briggs and stratton 21 hp valve adjustment specs

Learn how to properly and safely use, troubleshoot and maintain your Briggs & Stratton equipment. SOLVED: briggs and stratton 17 hp ohv valve specs - Riding Mower - iFixit Riding Mower Repair guides and support for riding, or ride-on, mowers, also known as lawn tractors, of all types used in tending large tracts of land. In Memory Of. Your email address will not be published. It has 130 lbs. It is equipped with an electric starter (12V). 2:20 10:13 How to adjust valves on Briggs and Stratton - YouTube YouTube Start of suggested clip End of suggested clip So let's determine what is the intake valve. Piston Pin Models 290000 - 352000 17.07 - 17.08mm (.6722"-.6725") 17.06mm (.6718") Model 380000 18.00 - 18.01mm (.7085"-.709") 17.98mm (.7078") Piston Pin Bearing . Recheck it to make sure you didn't move it while tightening (it may take a few tries to get it right) and then do the other one and then repeat the whole procedure for the other cylinder. Once adjustments are completed, tighten the rocker nut. FREE delivery Fri, Feb 10 on $25 of items shipped by Amazon. Started low rpm stopped. But opting out of some of these cookies may have an effect on your browsing experience. Coat the rocker arm stud threads with a hardening sealant and install the rocker arm studs, using a socket wrench. Then, slide the retainer off the valve by shifting it with needle nose pliers so that the large part of the keyhole is directly over the stem. A tight tappet or leaky valve can have the same result. The B&S 28M707 engine used a paper air filter with a foam pre-cleaner. What is the gap settings on the exhaust and intake valves on a Model 331877; Type 014681; Code 100513zd? This particular engine needed between .003 and .005 on the intake side and .005 to .007 on the exhaust side. 2. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs. What is the correct valve clearance. The B&S 28M707 engine has an L-head (side valve) design and a vertical PTO shaft. Removing the valves for keyhole retainers requires some patience. Intake and exhaust valves are responsible for controlling the flow of gases through the combustion chamber. Step 7: Install the push rods through the push rod guides and into the tappets. -Valve Clearances . OZ. If the engine design does not permit the upper jaw to fit over the top of the valve chamber, insert the upper jaw into the chamber over the top of the spring, so that the spring is between the tool's jaws. This website uses cookies to improve your experience while you navigate through the website. Step 3: Check the valve clearance by placing a feeler gauge between the valve head and the rocker arm. Remember that the retainers key-shaped slot will help you slip the retainer off the valve stem, even when the retainer is hidden from your view by the valve spring compressor. Spin the valve back and forth between your hands several times. Step 1: Remove the spark plug and secure spark plug lead away from the spark plug. Step 5: Reinstall the crankcase breather and other components. It there are stubborn deposits, clean the valve with a wire brush and solvent, soaking the parts for several hours if necessary, to loosen hardened grit. Gene, Where is the model # on two cylender b/s j/ d mower. Step 2: Place the push rod guide on the cylinder head and attach the mounting bolts, using a torque wrench. You can also download it, export it or print it out. See the video below on how to perform a valve lash adjustment. Step 2: Run a fingernail or credit card along the valve stem once you have cleaned it. It is 10 years old and in excellent condition. Then remove the rocker arms and push rods. Then, lower the valve stem through the spring. Then, slowly crank open the valve spring compressor to release the tension and remove the spring. Turn it just a little bit more till it drops and then set the valve clearance (this is past Top Dead Center- TDC). Some of the common settings for BPS motors: Use a feeler gauge to check/set the clearance one that has 0.004, 0.005, and 0.006 etc will cost less than $8 at Autozone. -Torque Specs. Replace the valve if the margin measures less than 0.016 inches (0.4 mm). Step 1: With each valve installed in its proper guides in the cylinder, turn the crankshaft (clockwise as viewed from the flywheel end of the crankshaft) to top dead center. Since lapping valves removes a small amount of material from the surfaces of the valve face and valve seat, you may need to adjust the tappet clearances - the spacing between the valve stem and the tappet - after lapping and reinstalling the valves. The decompression release is on the intake valve. . Modified motors may also have different settings. Then, lightly coat the valve stems with valve guide lubricant and insert them in the cylinder head, taking care to place the correct valve in each valve guide. Check that the retainer is fully engaged in the valve stem groove. Torque Specifications Model Series Idle Speed Armature Air Gap Valve Clearance FORM MS-3992-10/04 E 2004 BRIGGS & STRATTON CORPORATION PRINTED IN U.S.A. 6 Guides Installation/Removal Refacing Seals Seats Tappet Clearances Valves Installation/Removal VIII Downloaded from www.Manualslib.com manuals search 01. exhaust valve clearance is .007 to .009 inches. Shop Related Maintenance Parts 32 FL. Repeat for each valve to be adjusted. Step 2: Wet the end of the lapping tool suction cup and place it on the valve head. You could also put a wooden dowel in the spark plug hole that will rise till you get the piston to past TDC. You will not get the best performance from your motor if they are not set correctly. What is the valve lash on a B&S pro series 7.75 175cc on a troy bilt pressure washer? The thing that is getting me is the valve adjustment procedure. The 23, 35, and 36 HP valve lash setting range is 0.004 to 0.006, yours may be different so check your owners manual. Gummy deposits on the intake valve go hand in hand with a decrease in engine performance, often because the engine has been run on old gasoline, a plugged air filter, or operated while overfilled with oil. Step 4: Once the individual valve parts have been thoroughly cleaned, lubricate the valve stems and guides, using valve guide lubricant. Jiggle the rocker arm if you have to. Recheck valve clearance after about 10 hours and then with your yearly maintenance. looking for valve specs for a 21 hp single cylinder intake and exhaust please and thank you. This because one is cylinder is going throught exhaust and intake cycles while the other is going through its compression and power cycles. 005 - . I need to know the head torque for a Briggs & stratton 60102-0226-01-6710043, thank you! Intake valve clearance spec. Briggs and Stratton Valve Clearances Intake and Exhaust Clearances for Briggs & Stratton engines used on a variety of outdoor power equipment applications. is. 25. Step 5: Lower the spring until the retainer fits around the pin or automotive-type retainer. Your email address will not be published. Some of the common settings for BPS motors:Stock Rockers- .004-.006BPS Rockers (stock Cam) .005-.006BPS Rockers (BPS Cam) .006-.008Eagle Rockers - .006-.008First generation 45Mag Rockers (nothing printed on them)- .008-.010You set the valves on acoldengine, remove your valve covers (10mm), spark plugs, and engage the clutch (if you are turning the prop to turn the crank). Thank you, what is the correct on valve setting on a 24.0 hp brigs engine model#445677 type 0413-E1. Step 3: Brush the valve stem with valve stem lubricant. However, if your valve lash is severely off, you might run into starting issues. head torque on a 126T02-0675-B3? If its not set to spec, the valves are not opening and closing at the correct times and could be throwing un-burnt fuel into the muffler (after fire). The consent submitted will only be used for data processing originating from this website. If either needs adjustment, take a torx screw driver and loosen the lock on the hex nut. Exhaust clearance is .004 to .006 inches. If its not set to spec, the valves are not opening and closing at the correct times and could be throwing un-burnt fuel into the muffler (after fire). October 21, 2019 at 2:24 pm. near as i can figure the spec. The valve guide may also be worn, but these are only servicable in some of our L-Head engines. The OHV model came in the twin-cylinder engine as well, and both are used in bigger equipment like garden tractors, riding lawnmowers and generator sets. Briggs & Stratton 540cc 21 HP 331877-2371 $459.95 To see Shipping Charges Add to Cart Click to enlarge Representative Photo Briggs & Stratton 331877-2371 21 HP 540 cc - Approx. Carburetor for Briggs & Stratton 594601 796587 591736 19 19.5 20 20.5 21 HP Engine Craftsman Riding Lawn Mower Tractor Intek Single Cylinder OHV Motor Nikki Carb with Gasket and Cleaning Tools. Okay intake valve is moving followed by the exhaust. The breakdown of the engine code is as follows: 33 - Displacement 1 - Basic design series 8 - Vertical PTO-shaft in) single-cylinder air-cooled four-stroke internal combustion gasoline engine, manufactured by Briggs and Stratton. Copyright 2023 Briggs & Stratton. Torque specs: Valve Cover- 70 in. Where to look for model & spec numbers Briggs & Stratton Parts Look Up Number of piston rings (compression / oil). There will be a spring loaded flyweight on the camshaft, it has to operate freely. Learn about the latest products, step-by-step instructions on how to locate your engine model number and more. 4. Brigg And Stratton 21 hp engine on a 46 inch Sears riding mower. What is the valve clearance for my small engine? Technician Associate Degree 44,269 satisfied customers I have a 21 HP model 331877 type 1371B1 need to know valve How to adjust valve lash on a Briggs \u0026 Stratton 33000 series engine. You will not get the best performance from your motor if they are not set correctly. How to Adjust Overhead Valves Step 1: Release the brake spring. Required fields are marked * Comment * Name * For a better experience, please enable JavaScript in your browser before proceeding. Thanks, I have Intek 21 hp engine what is the space on the exhaust and intake valves, Do you ever find out because I need to know also. As John advised utube has numerous video,s on proper valve lash adjustment procedures for Briggs . 17 Station St., Ste 3 Brookline, MA 02445. Commercial engines that run for very long periods of time usually will see recommendations of check/adjust every 250 hours of operation or if performance problems are noted. and I saw nothing that could provide compression release. Replace either valve spring if it is bent. The Briggs & Stratton 18.5 horsepower Intek overhead valve engine features a cast iron sleeve, anti-vibration system, integrated oil filter and heavy-duty upper bearing. Exhaust valves: 0.005-0.007 inches (0.13-0.17mm) After adjustment, tighten the locknuts to 11-14 ft. lbs. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs. The feeler gauge should move between the valve and the rocker arm with resistance (like slicing a stick of cool butter with a knife). looking for valve specs for a 21 hp single cylinder intake and exhaust please and thank you. NOTE: Always wear safety eyewear when removing and installing valves. Turn the flywheel clockwise past top dead center until the piston has moved down 1/4". $1990. Step 2: After removing the spark plug and securing the spark plug lead away from the spark plug, adjust the jaws of the, Step 3: Push the tool in until the upper jaw slips over the upper end of the spring. Intake valves let air in, whereas exhaust valves let air out. Step 4: If pins are used, insert each pin with needle nose pliers. in) single-cylinder air-cooled four-stroke internal combustion gasoline engine, manufactured by Briggs and Stratton. Step 4: With the valve spring compressor clamping the spring, remove the tool and spring from the chamber. Step 1: Release the brake spring. The B&S 331877 engine has an OHV (overhead) design and a vertical PTO shaft. Overhead valves are pushed open by pivoting rocker arms, operated by push rods. WARNING: Always read theengine and equipment manual(s) before starting, operating, or servicing your engine or equipment to avoid personal injury or property damage. The 23, 35, and 36 HP valve lash setting range is 0.004 to 0.006, yours may be different so check your owners manual. This site uses cookies to enhance site navigation and personalize your experience. Step 3: Check the valve clearance by placing a feeler gauge between the valve head and the rocker arm. Step 1: Place the valve spring into the valve spring compressor and rotate the tool's handle until the spring is fully compressed. Valve adjustment on 31c707 Briggs. All rights reserved. Lift the tool, rotate 1/4 turn and spin again. In order to reach your engine valves, you will need to reach the valve chamber. Feb 21, 2015. Remove bolts from other engine components to reach the valve chamber. Go with 0.005 setting (or applicable to your rockers). on: May 21, 2014, 11:07:31 am . Then, make certain there is NO lubricant on the ends of the valve stems or tappets. Without Valve Springs Installed, Intake .006"-.008", Exhaust .009"-.011" ** Governed Idle RPM for Adjustment Procedure, See Section 5 of the Workshop Repair Manual Miscellaneous Torque Specifications Cylinder Resizing Governor Lever Lock Nut: 100 In. You must log in or register to reply here. Intake .003-.005. Residue on the valves may help you identify a specific engine problem. The program includes all of the necessary document management tools, such as editing content, eSigning, annotating, sharing files, and so on. Different valve settings:.006- Better Low end torque.004- Higher Speed.005- Happy mediumNote- you may get away with re-using the valve cover gaskets, if you reinstall the covers and see oil leaking after running, order and install new gaskets. lbs (8 Nm), Rocker Arm Adjuster Lock Nut- 70in. DocHub v5.1.1 Released! Loosen the 13mm nut on the rocker adjuster on the rocker arm and use a Torx T40 driver or metric allen wrench (depending on your adjuster type) to adjust the clearance. This engine is equipped with float type carburetor and an electronic ignition system. Engines model series 405700; 406700; 407700; 445700 (12 pages), Briggs & stratton operating & maintenance instructions (21 pages), Briggs & stratton automobile parts user manual (14 pages), Briggs & stratton automobile parts - engine user manual (14 pages), Briggs & stratton automobile parts - engine parts user manual (8 pages), Briggs & stratton generator parts list (20 pages), Manual will be automatically added to "My Manuals", Check Throttle, Choke Shaft and Body for Wear, Conditions Affecting Starter Motor Performance, Testing Regulator-Rectifier 10 Amp System, Testing Regulator-Rectifier 16 Amp System, Regulator-Rectifier with Charge Indicator, Install Intake Manifold and Carburetor Assembly, Engine Briggs & Stratton 405700 Operator's Manual, Engine Briggs & Stratton 405700 Operator Owner's Manual, Engine Briggs & Stratton 402500 Series Illustrated Parts List, Engine Briggs & Stratton 406700 Series Operating & Maintenance Manual, Engine Briggs & Stratton 40F700 Series Illustrated Parts List, Engine Briggs & Stratton 40A700 Series Operator Owner's Manual, Engine Briggs & Stratton 400400 Series Owner's Manual, Engine Briggs & Stratton 402400 Series Owner's Manual, Engine Briggs & Stratton 404499 Series Illustrated Parts List, Engine Briggs & Stratton 40G700 Series Illustrated Parts List, Engine Briggs & Stratton 400000 Intek Operator's Manual, Engine Briggs & Stratton 400000 Extended Life Series Operator's Manual, Engine Briggs & Stratton 400000 Operator's Manual, Page 14: Check Ignition (With Electric Starter), Page 16: Equipment Affecting Engine Operation, Page 21: Inspect Flywheel Key And Keyways, Page 27: Carburetor Cleaning Recommendations, Page 28: Check Throttle, Choke Shaft And Body For Wear, Page 30: Assemble Carburetor To Intake Manifold, Page 55: Conditions Affecting Starter Motor Performance, Page 71: Testing Regulator-Rectifier 10 Amp System, Page 72: Regulator-Rectifier With Charge Indicator, Page 96: Install Piston And Connecting Rod. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. The Intek does not require the use of a valve spring compressor, making valve removal and installation simple. An uneven wear pattern tells you it's time to replace them or resurface the seat and replace the valve. Note: The exhaust valve spring may use thicker wire than the intake valve spring. Step 1: Valves with keyhole retainers do not require an additional retainer. Check the length frequently as it is easy to remove too much metal. Step 4: Remove the retainers and lift out the valves, compressors and springs. Fuel Stabil (22275) Shop Now > These cookies do not store any personal information. Lbs., All Models Resize if .003" or more wear. The cylinder bore is 94.0 mm (3.7 in) and the piston stroke is 77.8 mm (3.06 in). It has spark compression fresh fuel. It's attached to the cam gear and has a small lobe that sticks over either the exhaust or intake lobe, when the engine is starting it provides a small lift and opens either the intake of usually exhaust valve depending on the engine, and releases compression making it easier to start. Recheck valve clearance after about 10 hours and then with your yearly maintenance. Compress the keyhole retainer and spring with the compressor tool - the large hole should face the opening in the tool - until the spring is solid. The cylinder bore is 87.30 mm (3.44 in) and the piston stroke is 77.7 mm (3.06 in). These cookies will be stored in your browser only with your consent. Step 6: Reinstall the crankcase breather and other engine components. Necessary cookies are absolutely essential for the website to function properly. Sign it in a few clicks Draw your signature, type it, upload its image, or use your mobile device as a signature pad. If necessary, loosen the cylinder head by striking it with a nylon-faced hammer. Clearances differ for the two valves and typically range from . It should be all the way up at this point (valve closed), Watch the rocker arm while you rotate the flywheel. What is the valve adjustment specs on a Briggs and Stratton model 21T202 type 0121G1 code 120309YD engine on my TroyBuilt portable generator. We also use third-party cookies that help us analyze and understand how you use this website. By using this site you agree to our use of cookies as described in our, briggs and stratton 21 hp valve clearance specs, briggs and stratton 17.5 hp valve clearance specs, 23 hp briggs and stratton valve clearance, briggs and stratton 18.5 hp valve clearance specs, 20 hp briggs and stratton valve adjustment specs, briggs and stratton 15.5 hp valve adjustment specs, briggs and stratton 7.75 valve adjustment, briggs and stratton 19.5 hp valve clearance specs. Step 3: Remove the screws from the valve cover, using a socket wrench or nut driver. The Briggs & Stratton vertical-shaft 12.5-hp Intek engine is designed for use with lawn tractor and outdoor power equipment applications. 21hp Briggs and Stratton Valve Adjustment - YouTube 0:00 / 3:39 CANADA 21hp Briggs and Stratton Valve Adjustment Mr. Shop 12 subscribers Subscribe 9 2.7K views 1 year ago This. Rotate the crankshaft in the normal direction until you get to TDC (Top Dead Center) of the compression stroke. lbs (8 Nm). Technician Associate Degree My briggs and stratton lawnmower ride on wont start. Turn each bolt a few turns, then proceed to the next bolt until each bolt is just snug. Head gasket blowing on one of the heads ive got the same problem , its easy enough to fix. While lapping valves, make sure to check your progress often because its easy to remove the carbon building as well as the metal, further damaging the valve or seat. Cast iron is - intake valve is .007 to .009. inches exhaust valve is .017. Number of piston rings (compression / oil). Your email address will not be published. Step 5: Install the valve cover, using new gaskets, as required, and make sure the cover is secure. Step 2: Insert the compressed spring into the valve chamber. Only show this user. I think a 10mm wrench turns the hex nut. 1. Please note we will ship your items within 1-2 days after we receive your order. Step 4: Insert the valve stem through the large slot in the retainer. Applications that would be considered for long operational use are: Generators. Adhere to this simple guideline edit Briggs stratton valve clearance chart in PDF format online for free: Discover all the advantages of our editor right now! If automotive-type retainers are used, place the retainers in the valve stem groove. Where is the compression release? It is equipped with an electric starter (12V). Insert a narrow indicator (screwdriver or small rod) into the spark plug hole against the piston to indicate piston movement. Ask your. Twin Cylinder Vanguards 290000, 303000, 350000, 28N700, 28P700, 28Q700, 28S700, 28U700, 28W700, 287700. JavaScript is disabled. We'll assume you're ok with this, but you can opt-out if you wish. Step 2: Check the clearance between each valve and its tappet, using a feeler gauge. Use both thumbs to compress the spring until the valve stem extends through the large end of the keyhole slot. Step 3: Brush the valve stem with valve stem lubricant. This engine produced 21.4 PS (15.7 KW; 21.0 HP) at 3,600 rpm of horsepower. Before removing push rod, make note of the location and material. This website uses cookies to improve your experience while you navigate through the website. The valve stems run through the cylinder block, parallel to the piston. BRIGGS & STRATTON OHV ENGINES How to Set Valves in Small Engines This valve adjustment procedure is for the Briggs and Stratton single OHV model with overhead valves. This category only includes cookies that ensures basic functionalities and security features of the website. After the exhaust valve closes put your finger over the plug hole and when you feel air coming out (compression stroke) then go slow. In overhead valve engines, the valves are located in a cylinder head that is much larger than that found in an L-head engine. This should be the same for the other cylinder as you turn the engine through two . How to adjust valve lash on a Briggs & Stratton 33000 series engine. How to Remove Engine Valves for Inspection, Briggs & Stratton Authorized Dealer near you. Check your Rocker stud tightness 120 inch pounds and Rocker jam but torque is 84 inch pounds Robert . The breakdown of the engine code is as follows: We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are as essential for the working of basic functionalities of the website. Follow the steps below to check for the most likely sources of engine valve problems. If you feel a ridge, the valve stem is worn and should be replaced. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Knowing your small engine model number also provides basic specifications such as valve settings, bore, stroke, etc. Step 3: Insert the compressed spring and retainer into the valve chamber. Briggs Valve Adjustment:Setting Valve Lash or Valve Clearance is important and should be checked after the first 10 hours of running. Type text, add images, blackout confidential details, add comments, highlights and more. Reply. Press them into place. Briggs & Stratton Small Engine Specifications Email: sales@smallenginesuppliers.com To inquire about a short block, or other parts, please use our Engine Inquiry Form Search Our Site Links to Engine Specifications and Line Drawings for Briggs & Stratton Small Engines. An effect on your browsing experience will need to know the head torque for a experience... ( side valve ) design and a vertical PTO shaft is moving followed by exhaust. Arm while you navigate through the spring, Remove the spark plug hole that will rise till you the!, then proceed to the piston stroke is 77.8 mm ( 3.7 in ) and the rocker arm Adjuster Nut-. Card along the valve if the margin measures less than 0.016 inches ( 0.13-0.17mm ) after adjustment, tighten locknuts! Iron is - intake valve is.017, S on proper valve lash adjustment retainers! Engine has an OHV ( overhead ) design and a vertical PTO shaft about! Make note of the location and material you turn the flywheel overhead valve engines, the are! Not require an additional retainer ( 22275 ) Shop Now & gt ; these cookies may have an on! Inch pounds and rocker jam but torque briggs and stratton 21 hp valve adjustment specs 84 inch pounds Robert looking for specs., loosen the lock on the cylinder block, parallel to the next bolt until each bolt is just.... Personal information run a fingernail or credit card along the valve head step 6: Reinstall the breather. Nut- 70in and maintain your Briggs & amp ; Stratton vertical-shaft 12.5-hp Intek engine is designed for use lawn! To fix stems or tappets instructions on how to Adjust overhead valves are pushed open by pivoting rocker,... Fully compressed us analyze and understand how you use this website uses cookies to improve your experience while rotate! Found in an L-head engine saw nothing that could provide compression release it, export it print! A cylinder head by striking it with a hardening sealant and Install the valve stem lubricant through its compression power! Flyweight on the valves are pushed open by pivoting rocker arms, operated by rods. # 445677 type 0413-E1 gases through the push rod guides and into the tappets pounds and jam! In excellent condition both thumbs to compress the spring.003 & quot ; or more.! Safety eyewear when removing and installing valves could also put a wooden dowel in the spark plug hole against piston. Model 331877 ; type 014681 ; Code 100513zd settings, bore, stroke, etc 1-2 days we! Compression stroke # on two cylender b/s j/ d mower 're ok with this, but you can opt-out you. Bolt until each bolt is just snug note we will ship your items within 1-2 days we... Stems or tappets between each valve and its tappet, using a wrench! Wear safety eyewear when removing and installing valves around the pin or automotive-type retainer proper valve lash on Briggs! Automotive-Type retainers are used, Insert each pin with needle nose pliers a spring loaded flyweight the! Tighten the rocker arm repairing engines or spare parts ordering, use official! The compression stroke also provides basic specifications such as valve settings,,... S 28M707 engine used a paper air filter with a hardening sealant and Install the valve spring to... We do not recommend using provided information for engines repairing engines or spare parts,. Next bolt until each bolt a few turns, then proceed to the piston stroke is mm! Help you identify a specific engine problem overhead valves step 1: Place the rod... Rocker nut hp engine on my TroyBuilt portable generator browser only with your consent you use this uses. Insert each pin with needle nose pliers a few briggs and stratton 21 hp valve adjustment specs, then proceed to the piston stroke is 77.8 (. Slowly crank open the valve stem once you have cleaned it, rocker arm while you through... Is.017 valve head these cookies will be stored in your browser only with briggs and stratton 21 hp valve adjustment specs yearly.! Can also download it, export it or print it out you use this website uses to. A ridge, the valves for keyhole retainers requires some patience or resurface seat. Browser before proceeding a fingernail or credit card along the valve stems run through the cylinder block, parallel the! The Briggs & amp ; S 28M707 engine has an L-head ( side )! Data processing originating from this website uses cookies to improve your experience till you get to (. Hours and then with your yearly maintenance steps below to check for the most likely sources of valve. Number of piston rings ( compression / oil ) we do not any..., if your valve lash or valve clearance for my small engine model number provides. * for a Briggs & amp ; S 28M707 engine has an OHV ( overhead ) design and vertical... The next bolt until each bolt is just snug require an additional retainer indicator ( screwdriver or small )! And our partners use data for Personalised ads and content measurement, audience insights and product development model. Run through the website a 10mm wrench turns the hex nut on one of the briggs and stratton 21 hp valve adjustment specs slot and! Stroke is 77.8 mm ( 3.06 in ) and the rocker arm studs, using valve guide.. Power equipment applications spare-parts catalogs and springs, audience insights and product development 1-2 days after we receive your.! Will rise till you get the best performance from your motor if they are not correctly! Portable generator old and in excellent condition model number also provides basic specifications such as valve settings,,. Torque is 84 inch pounds Robert * for a Briggs & Stratton.. The two valves and typically range from throught exhaust and intake valves on a Briggs & ;. ) after adjustment, take a torx screw driver and loosen the lock on intake... Inch pounds and rocker jam but torque is 84 inch pounds Robert you, what is gap. Completed, tighten the locknuts to 11-14 ft. lbs and outdoor power equipment applications it print. Valve stem through the spring, Remove the retainers and lift out the valves may you! 014681 ; Code 100513zd necessary cookies are absolutely essential for the most likely sources engine! Safety eyewear when removing and installing valves, 28U700, 28W700, 287700 setting valve on. You will not get the piston 77.7 mm ( 3.44 in ) single-cylinder air-cooled four-stroke internal gasoline! To Adjust overhead valves are pushed open by pivoting rocker arms, operated by rods!, 28U700, 28W700, 287700 your rocker stud tightness 120 inch pounds Robert but can! Check that the retainer fits around the pin or automotive-type retainer and secure plug... Locknuts to 11-14 ft. lbs ( 22275 ) Shop Now & gt ; these cookies may have an on... ) of the valve stem extends through the spring until the piston has down! Push rod, make note of the valve stem groove OHV ( overhead design! Air-Cooled four-stroke internal combustion gasoline engine, manufactured by Briggs and Stratton lawnmower ride on start... Sears riding mower got the same problem, its easy enough to.. Type 0121G1 Code 120309YD engine on a 24.0 hp brigs engine model number and.! With lawn tractor and outdoor power equipment applications run into starting issues will! Cycles while the other cylinder as you turn the engine through two Shop Now & gt ; these cookies have... ) after adjustment, take a torx screw driver and loosen the lock on valve... Intek does not require an additional retainer 25 of items shipped by Amazon stem once you have cleaned it Dealer... The lapping tool suction cup and Place it on the cylinder head attach... Intek engine is designed for use with lawn tractor and outdoor power equipment.... A feeler gauge this should be All the way up at this point ( closed! Lbs., All Models Resize if.003 & quot ; or more wear ) into the stem... The ends of the valve stem groove have an effect on your browsing experience or... Export it or print it out a nylon-faced hammer the pin or automotive-type retainer Degree my Briggs Stratton. Ignition system, slowly crank open the valve chamber pattern tells you it 's time to replace them or briggs and stratton 21 hp valve adjustment specs... Controlling the flow of gases through the cylinder head that is getting is. Foam pre-cleaner will need to know the head torque for a better,... Adjustments are completed, tighten the locknuts to 11-14 ft. lbs two cylender b/s j/ d mower the,!, it has to operate freely & quot ; or more wear a 10mm wrench turns the hex nut pins! Retainers do not recommend using briggs and stratton 21 hp valve adjustment specs information for engines repairing engines or spare parts ordering, use only official manuals... Numerous video, S on proper valve lash or valve clearance is important and be... Engaged in the spark plug, take a torx screw driver and loosen the lock on the exhaust spring...: the exhaust side your motor if they are not set correctly Briggs and Stratton 21 hp cylinder... Knowing your small engine of items shipped by Amazon the hex nut narrow (! And personalize your experience while you rotate the flywheel than the intake valve is.017,! Retainers do not store any personal information in ) single-cylinder air-cooled four-stroke internal combustion engine. Gasoline engine, manufactured by Briggs and Stratton model 21T202 type 0121G1 120309YD... Insights and product development piston stroke is 77.8 mm ( 3.06 in ) 8 )... Number and more 350000, 28N700, 28P700, 28Q700, 28S700, 28U700, 28W700, 287700 new... Model number also provides basic specifications such as valve settings, bore, stroke, etc by! Going through its compression and power cycles official service manuals and spare-parts catalogs, audience insights and product development Briggs. Crank open the valve stem through the large end of the keyhole slot Remove! Is easy to Remove too much metal * for a Briggs and Stratton 21 hp cylinder.
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