Re: Anti-syphon valve ?????
I am having a similar problem. My motor starts and runs fine for hours but when I shut it off I have to pump the primer bulb to fill the carbs and get it to start, once running no problem. I was told that it could be vapor locking as the 1984 90hp merc does not have much air flow to cool the surrounds of the engine. Let me know how your repairs go or does anyone have my type of problem.
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