Specifications

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spark plug was screwed into.
6. Watching the compression tester gauge pull the starter cord a number of
times until the needle reaches a peak pressure.
Note: For a Video tutorial on how to compression test a Weed Eater engine
please follow this link.
Remember! A weed eater must generate more than 60 PSI or lb. per square
inch to be able to start the engine. If your weed eater is less than 60 psi then
your engine cylinder has a leak or the piston cannot compress enough air.