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Mystery engine vibration, gear box failure?
Hi Everyone, Our Sole Mini 26 has developed a severe vibration in the for-aft direction (side to side and up-down remain vibration free) when in forward gear. As we increase revs, the size of the vibrations increase to the point that at cruising speed the engine and shaft assembly is moving nearly an inch on its mounts, many times a second. Oddly, when in full ahead at 3400 revs say, everything is fine and normal. For this reason, we do not suspect a damaged prop or shaft. We have been told that perhaps the clutch cones in the RONIM V gearbox are worn and slipping, until sufficient thrust is applied in full ahead to hold them together. Accordingly, we have removed the gearbox ready to change them. Before its striped though, i thought ide ask on here to see if anyone has any other theories about our mystery vibrations, or any advice as what to look for in the gearbox. Thanks, Matt