Reply To: Johnson P-30 connecting rods: top or bottom

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December 1, 2023 at 6:47 pm #282958
Tom
Participant

    US Member

    It does make a difference.  If it’s wrong, you get spark when the pistons are at the bottom of the bores.  Pistons should be at top dead center with the keyway pointing to the arrow cast into the top of the crankcase.

    Tom