I have a Bridget and Stratton 16.5 horsepower model number 313-777 need specs on the valve clearance
With the valve cover removed, look at the valve and follow the pathway to the source. 1 chamber leads to the carburetor and the other leads to the muffler. Intake=carburetor Exhaust=muffler
Rotate the engine in the direction it runs, since the stroke sequence is intake, compression, power, exhaust, the exhaust valve will open and close followed closely by the intake. After the intake opens and closes there will be a pause before the exhaust opens and closes again.
SOURCE: Briggs and Stratton OHV V-Twin 24hp repetitive valve adjustment
Try pulling out the choke a little, if it stops backfiring the mixture is too lean, check the intake
pipes at the cyl head and also the plastic runners to the carb for leaks.
Dennis in Chicago
SOURCE: what is the valve clearance on a briggs &
.003-.005 intake, .005-.007 exhaust for single cylinder OHV
SOURCE: how do you adjust the valves on a 17.5 ohv briggs
Hi 1st remove the rocker cover and spark plug
hold a long skinny screwdriver down the plug hole and wind the engine by hand until you get top dead centre (NOTE WATCH ROCKERS) first the intake valve will open then close when it closes the piston should be coming up to top dead centre and both valves should be closed and the rocker loose setting should be 0.004 thou you need to undo the locking screw down the centre of the adjusting nut then you can adjust to setting, (DONT FORGET TO DO THE LOCKING SCREWS BACK UP) reassemble
SOURCE: how to adjust valves on briggs and stratton 17.5
Remove spark plug
Remove cover from engine that covers the flywheel
Remove rockerarm cover or valve cover
Find TDC (top dead center) by rotating the flywheel by hand and your finger over the spark plug hole as you rotate the flywheel you will feel pressure against you finger at some point then stop.
This is the compression stroke it is called now find a long slim round piece of plastic or plastic ink pen to stick in the spark plug hole (If you are careful a slim screwdriver can be used ) and find the piston top, then slowly rotate flywheel again (cw) as the piston is moving up pushing the plastic up as you rotate the flywheel slowly.
a max. piston up or tdc as you turn you will feel and then the piston starts to go the other way,at that transition this is tdc (piston is on top of stroke) leave it there,,both valves should be closed at that point.
Have a feeler gauge and set the exhaust valve at a loose .002 and the intake a loose .004 be sure engine is cold when valves are adjusted
Feeler gauge goes in between the rocker arm tip and valve stem top for each valve setting.
Note the rocker adjustment at the push rod side of each valve by tightening and loosening to make adjustments,lock your adjustments in place and rotate flywheel a few times and recheck settings
SOURCE: timing for briggs and stratton 15.5 engine
There are no timing marks, timing is correct when the flywheel key is in place, the flywheel is properly torqued and the air gap for the magneto is properly set
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