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  1. C

    Merc 402 mystery part

    I've just bought a Mercury model 402 (40 HP 2 cylinder). Model year is 1976, SN 4362XXX.<br /><br />What is the little round plug located above the cavitation plate on the exhaust housing?<br /><br />The one on my motor is in poor shape. Before I take it out, I want to find out what it is -...
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    V4 timing base sensors - is this how they work? 85 HP evinrude no spark one cyl

    Do I have this straight??<br /><br />One sensor is for cylinder 1 and 3.<br />The other sensor is for cylinders 2 and 4.<br /><br />Each sensor generates a differeent pulse depending upon the polarity of the magnet as it passes by, therefore, the single sensor can deliver two different...
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    85 HP Evinrude. No spark on #3 cylinder

    Just bought a 1977 85 HP Evinrude as part of a package deal.<br /><br />Before trying to run it I bought a new gas tank, new gas line and primer bulb. New gas and fresh mix.<br /><br />First try on the lake it started up OK, and seemed to run fine, although with a bit of vibration.<br /><br...
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