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Valve clearance on 31p977 e1 - Measuring Tools & Sensors

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What is the make model and year of the vehicle and engine type and size.

Posted on May 16, 2017

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How tocheck timing onbriggs stratton model44577


The timing is fixed, if you suspect the timing is off the only adjustments available are the .030 clearance from pickup to flywheel and the shear Key that positions the flywheel on the crankshaft. You would also want to make sure your valve clearance is .030 as well, the issue sounds like a valve leaking, a dead cylinder or mal adjusted valve clearance causing the exhaust valve to hang open just a bit.

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reset the valve clearance to .010 and .012 as they will holding open when hot and upsetting the carby flow

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How do I adjust the valves on a Briggs and Stratton Intek V Twin


Remove the valve covers look up your valve clearance specs turn the engine by hand until the piston is at top dead center then go 1/4 turn past that and then put a feeler gage for the valve clearance you need for that valve and snug up the adjustment nut. Check your oil when your done some oil will spill out when opening the valve cover.

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I have a briggs &straton intek 26 hp and the compresion seems to be not releasing.what can i do?


If the valves are adjusted too loose, the compression release will not work, and will make starting the engine difficult. I believe the clearance is supposed to be .005". If the clearance is too large, the 'bump' on the cam will not move the valve off its seat when cranked slowly, and compression will make the engine hard to crank over.

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Engine won't start and backfires


Did you loosen the coil when you changed the key? Check the setting between the flywheel and the coil. !0,000ths, I think.

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Have a 20hp vanguard on a go-devil long tail motor. engin runs at idle speed then when i put the propeller into the water it stalls. if i pull the choke and give full throttle it will run some and backfire


These engines seem to have problems maintaining the correct valve lash settings. try taking the valve covers off and checking the valve/pushrod clearance.on tdc compression stroke it should be .001-.003 clearance. then check exhaust stroke tdc on exhaust stroke. clearance should be same on the other valve then. hope this cures your problem.

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Sears 42 inch lawn tractor with model 31P977 type 0635-E1 20hp lost power when at half throttle. won't start at all. has spark and fuel in cylinder. Could it be a stuck valve? gas, oil is fresh. this is...


IT CAN BE A STUCK VALVE IVE BEEN SEEING A LOT OF THAT THIS YEAR CK TO SEE IF THE PUSH ROD IS BENT HOW YOU DO THAT IS REMOVE THE COVER ON THE FRONT OF THE MOTER ITS HELD ON WITH 4 BOLTS THEN ONCE THATS OFF YOU CAN PUSH ON THE VALVE TO SEE IF ITS STUCK SOME TIMES THE SET SCREW BACK OFF IF THATS ALL IT SI THAN PUT SOME LOCK TITE ON THE SET SCREW AND RESET IT LET ME KNOW IF YOU NEED THE SETINGS ILL TELL YA ILL LOOK THEM UP FOR YA

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Looking for Intake + Exhaust valve clearances for Craftsman 20hp lawn tractor model# 917.276813 Engine # 31P977


The cold setting is .002 for the intake and .004 for the exhaust.I just set them both at .003 and it works fine.

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