mercury outboard engine problem?

  • Thread starter Thread starter Larry G
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Larry G

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I have a mercury black max 150hp 1987, Engine has not ran much this year, (gas prices), engine runs great, but i fired it up to winterize it & everything was fine for about 3 minutes, when I noticed my PSI guage for the bottom end pressure went to 0,, I shut it down. this engine does not have an oil tank, it uses the mixture from the fuel tank to lube bottom end. Because of old gas in tank I susspected gum deposits in PSI guage or the line that connects it to engine, i checked that and it is all fine, any help on which direction to go next would be greatly appreciated, THANKS Larry G............
 
The only PSI gauge i'm familiar with measures water pressure to the block. I'd drop the gearcase and have a look at the W/P impeller.
 
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