Derek Duck

Thank you, Is there a video or link for valve adjustment on this engine. When I changed the oil I put about an ounce of Lucas oil stabilizer which says 100% petroleum, it is very thick and is designer to stick to all internal parts to prevent dry starts and extend engine life, how small it the acr is it possible this blocked the acr. I bought the mower in Spring 2015 new from a dealer so it should only have 2 mowing seasons.