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    Mercury 85hp runs fine on Muffs but Boggs down in Sea

    Hi All! I have a Mercury 85 HP Thunderbolt 1977(I think)serial 7101664 It runs fine on muffs connected to a hose but when I took her out in the sea it starts well but runs rough and will go into gear and can increase speed slightly but once I open her up abit more she bogs down and will stop if...
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    Mercury 850 Outboard super high Idle

    Hi Everyone, I have a 1977 Mercury 850 Outboard that was running fine last year and ran fine once this year but the next time I started it, it started with a super high idle. Now it wont start unless I block one of the air intakes and then it will be super high idle again. Any ideas would be...
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