This video shows how to adjust valves on a 18.5 hp single cylinder Briggs & Stratton engine. This is a common engine found on John Deere Z225 riding mowers.

Nov 17, 2012 · Adjust the clearances as required by turning the rocker screw. Once adjustments are completed, tighten the rocker nut. Install the valve cover, using new gaskets, as required, …

Before making the adjustment, check the rocker studs at the head (bottom) w/ a 10 mm wrench and make sure they are tight. The adjustment is done cold, 1/4" either past TDC or 1/4" back …

Nov 30, 2010 · If you find that your engine becomes difficult to start, proper adjustments to the intake and exhaust valves may be necessary. Adjusting the valves for your 18.5 horsepower …

Mar 11, 2017 · Usually a too tight valve will cause the engine to die when its hot because then its open all the time. You are adjusting the valves with the piston part way down the cylinder after …

Backfiring after 10-15 seconds suggests incorrect valve clearance or ignition timing. Check exhaust and intake valve clearances per specs to ensure proper sealing.

Looking for valve maintenance and repair tips for your small engines? Follow our step-by-step guide to remove and clean your valves for better engine performance!

Aug 20, 2003 · You're the 1 in 1000 owners who would actually check/adjust the valve lash. Prolly a good thing to do. That, or buy a Kohler with hydraulic lash adjusters. What are the specs so …

Jan 20, 2018 · I typically have to do each valve a couple times before satisfied. Another skill for the newbie is judging when that feeler gauge strip gives off the "proper" feel so that you really …

To correctly adjust the valves, the valve springs must be removed (L-head engines only) and have the piston at 1/4″ past TDC on the power stroke.