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Mend Briggs & Stratton Quantum Compression Spark Plug

4.5 Quantum Briggs and Stratton?

Engine will not fire, on compression stoke will not pull.Have checked plug spark this is ok. When plug removed, movement is correct. It is as if there is too much compression.I have de-coked and checked valve movement which appears to be ok. Have also checked stop system which appears ok. please help

Howard Mitton
August 2009

Briggs & Stratton Briggs & Stratton Quantum Garden Tools, Lawn Mowers Compression Spark Plug Briggs & Stratton

Have you checked whether the flywheel key has sheered. Sure sounds like your problem.

John
September 2009

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Briggs & Stratton Quantum - No Start Issue