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notbob notbob is offline
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Default 2 cycle compression ......

On 2012-03-27, Steve B wrote:

would hit TDC, or fire with a spark. Does two strokes not have the "POP"
that four strokes have because of their different configuration?


Sounds like you want to know if there is enough compression in yer
2-stroke. When I was a motorcycle mechanic, lo these many yrs ago,
the rule of thumb for both 2 and 4 strokes was: Pull the spark plug.
Put yer thumb firmly over the plug hole, make sure the throttle is
wide open, and cycle the engine. If there is enough compression to
blow air past yer thumb, that's good enough. If not, you need a
rebuild. Typically a bore job and new rings.

nb


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