Question about Craftsman Push Rear Bag Lawn Mower w High Wheel (CA)

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I have a craftsman 7.0 hp b&s. question is that, after 5min. of running, very hard to start back up. got new plug, cleaned carb. made sure float works properly. one thing i have noticed that it sounds like a little knock to it

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I would do a compression check. If compression is under 60lbs, it would be very hard to start. If compression is not good, don't junk it just yet, rather, check your valve clearance's. Intake should be .005 to .007 thousands and exaust should be .009 to .011. I have seen valve stems grow and have had to grind a few thousands off. If valve clearance is off you could be losing compresson thru a valve. If valves are ok, and compression is low, you have a ring problem. This is where and how i would start. Good luck.

Posted on May 29, 2010

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Posted on Jan 02, 2017

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