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  1. D

    96 Mercury 40hp C40 fuel system overhaul

    This is the two stroke, carbed prop model. I've been using this motor one week a year for the last few years. I only put 90+ octane E0 through it but I can't speak for previous owners. Anyway, last year it didn't want to start at the start of vacation week and the mechanic got it going by...
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    M70A running on one cylinder - bad check valve?

    I'm trying to get an M70A running again - last year it quit on us with a flooded lower cylinder and puking oil/gas out the exhaust. The mechanic at the nearby marina did not see a simple external fix - he saw good compression and the cylinder liners were not scratched up. He said the reed...
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    Source or substitute for Threebond 1107, exhaust gasket

    I pulled the powerhead off my friends M70A and the gasket to the engine base was trashed and blown through in a section. Based on the manual, I should apply Threebond 1107 to both sides of the replacement gasket. I could find very little on this other than that it's a non-hardening high temp...
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    Looking for advice on older M70A motor

    I go fishing each year with a retired fellow. We use his runabout boat that has an M70A s/n 13133. I don't think it has very many hours on it. Each year for the fishing trip it gets some TLC and runs ok, but there are ongoing issues. He takes it to a mechanic every year but I really can't...
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