Reply To: 1956 Johnson 15HP Rod bearing clearance

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January 3, 2022 at 1:33 pm #252269
frankr
Participant

    Look inside the pistons. One side should be marked “LOOSE” or “L”. That side is a slip fit, while the other side is a press fit. If you intend to save or re-use the piston, you must drive the pin from the loose side (through the tight side (which you hopefully have supported). Driving it the wrong direction will distort the piston. Of course that doesn’t matter if you intend to scrap it anyway.