Question about Briggs & Stratton Lawn-Boy Insight Series 21-Inch 190cc 650 Series Gas Powered Engine Variable Speed Self-Propelled Lawn Mower

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My Briggs & Stratton Quantum 65 starts perfectly from cold but refuses to re-start when hot. Any ideas?

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Do a compression check when cold, then again when hot. Sounds like when its hot your losing compression. If this is the case, it won't want to start when hot. Compression should be above 60 lbs. Thats where i would start. I hope this is of some help to you.

Posted on May 29, 2010

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Get some GUMOUT carburator cleaner GAS ADDITIVE. Put about 1/2 TEASPOON in the gas tank and about 1 tablespoon per gallon into your spare gas. The float pin is probably sticking from winter non-use. This will free it ip.

You can also remove the bowl from the carburator and spray everything to immediately dissolve the varnish. Be careful not to lose the pin spring.

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