Engine was hard to start, wasn't releasing compression. Adjusted valves to .004-.006 at TDC. Ran great for about 4 or 5 hours and started popping/backfiring. Adjusted valves again. (exhaust valve was a little loose) Ran good 4 or 5 more hours and problem returned. I took it to a local shop this time. He called Briggs and was told to set the valves to .005 at TDC on both intake and exhaust. Once again, it ran great........for 4 or 5 hours.......popping again..........backfiring again!!!!!!! When I pull valve covers and check valves, the exhaust valve on both cylinders was a little lose. However, the locknuts on the adjusters were tight. I AM LOST. Any help would be greatly appreciated.
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
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When trying yo start the lawn moyer it acts like its hitting a tight spot. I checked the compression and the compression is much higher on one side than the other.
With the plugs out the engine turned over fine,
When it does start it runs fine.
Please tell me what to do to releive too much compression.I have never adjusted the values.Can you help? Thanks Jay
Hi, Jay. Try this link. http://www.smalleng.com/Repairvideos.htm...
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