Re: Mercury 100 hp 4 cyl warning beep

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July 31, 2016 at 3:16 pm #41304
jerry-ahrens
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    Do yourself a favor, and go ahead and change the oil injection check valve while your at it. I believe yours has the 90 degree check valve threaded into the fuel pump. Or some models have the check valve teed into the fuel line, just ahead of the fuel pump. Post a couple of pics of the port side of the motor so we can have a look. [/size]