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    Mariner 40C Carburetor question

    Hi guys, I took my carburetors off and under the main plate on top of the carburetors, there are a couple rubber gaskets and a very thin metal plate that goes under the gasket in the carburetors. The rubber gaskets look like they are cracking, so I would like to replace them. However, the...
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    Can't remove power head off 1987 40 HP Mariner. Please help.

    Hi all. I need to remove the powerhead from my motor, and I can't get it to budge...not even a millimeter. Manual says to remove the cowling, spark plugs, starter, recoil starter assembly, carbs, fuel filter, magneto, CDI base, linkage rods, the 8 bolts and washers that secure the powerhead to...
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    I need a new piston for my motor, but have 2 different part numbers. Which one??? Please help!

    I need to replace one of the pistons on a 1990 40 HP Mariner (Mercury motor made by Yamaha). There are 2 standard pistons available (part#761-8563M and 761-811828T). Both items can be purchased through...
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