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    Rebuilding 82' 25 HP Johnson.

    After investigating some silvery deposits on my sparkplug, I discovered this...<br /> <br /> <br /> <br /><br />My fear is I will rebuild this motor and not fix the problem of why this occured in the first place. I use Chevron gas and Penziol TC-W3 synthetic blend oil and measure my mix out...
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    Spark plug deposit help please!

    I had my 82' 25 HP Johnson out on the lake yesterday and lost one cylinder. I stopped and replaced the plugs and everything ran fine. However, on the top cylinder, there were some silvery metallic looking deposits all over the plug (I assume that's the one I lost). The bottom cylinder plug...
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    Need some info on a Merc 9.9

    Hi all, I recently came into a Mercury 9.9 motor and was hoping to find out the year and maybe some tips about the motor. The serial number is 0D025951 I'm pretty sure the motor was dunked and then sat for a few years, after cleaning out the sludge from the carb it now seems to run fairly...
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