Home Forum Ask A Member Compression check question Re: Compression check question

#18647
legendre
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    quote Chris_P:

    quote legendre:

    The carb should always be held at WOT for a compression test, which is not all that different from not having a carb at all..

    Actually for our 2 stroke outboards throttle setting is totally irrelevant for a compression test. Hold it at no throttle, half throttle, full throttle, doesn’t matter.

    I can’t see any reason a 2-stroke OBM would be any different, but I’ll defer to your experience for now.

    But let me ask this – what kind of compression reading does your OBM give if you +plug+ the carb inlet(s)? How does that plug differ from a fully closed throttle plate?