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    Headgasket for mercury 9.8 -74

    My friend burned his motors (mercury 9.8) headgasket doe to the faulty impeller (we changed it last year)and now Im asking where to get a new headgasket for his motor. I have just similar 9.8 and it is a great little motor, so my friend would want to get it to work again. Thanks for replies.
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    Yamaha 40 betol -91 cooling problem

    I have a -91 yamaha 40 betol outboard and I have recognized that it is cooling poorly when warm.Ok the problem is this : When I start the engine cold the water is coming out of the pee hole normally, but when I have driven cruising speed for a while and then slow to idle speed the water stream...
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    Is it possible to upgrade yamaha 40 to 50

    I have a yamaha betol 40 -91 and I have recognized that the 50 hp model is nearly the same engine as my 40 hp model. What is the difference between these engines? I would need the extra 10 hp to get on plane with more load onboard. Thanks for answers.
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