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    1979 100HP 2 stroke, black tar around spark plugs on used motor

    1979 100HP 2 stroke has black tar around spark plugs. It seems to run ok but is getting a bit sluggish. Did a previous owner have the spark plugs loose? Or what do you think caused this?
  2. D

    25HP Mercury BigFoot 2001 overheating even after replacing impeller with kit and removing thermostat

    Hi everyone! I could really use some help here, I've got a 2001 Mercury Bigfoot, 25hp 4 stroke that's overheating after 3ish minutes if I run above an idle. It's running on a fairly shallow sandy river. Removed and replaced thermostat, no change, still overheats. Ran the motor with thermostat...
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