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    Yamaha 3.0 Head Design - unique??

    Does anyone know if Yamaha designed / manufactured their own head for use on the GM 3.0 block? I think I have a leak from the exhaust gasket, and hoping I can use a gasket from a Mercruiser or similar. Advice...? Thanks in advance,
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    Overheated water shutter debris removal

    Hello all, I'm not only new to the forum but also a new -1st time boat owner. Issue; Overheated the Yamaha L4 3.0, (water pump drive belt failed) Belt replaced along with a 140* Thermostat. Prior to the Overheat, it always ran at 140*, now runs at 150*+, not the same power, and a very...
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