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    '78 Merc 50, spark & fuel but won't even cough

    Need some experienced advice on a 1978 Merc 50hp, please. It has the switchbox & 4 coils. I bought it with a dead switchbox, replaced same, and cleaned the carbs. At that point, I could rope start it, using no controls. I would manually set the throttle arm so that the spark arm was back...
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    Newbie whining about carb access on early 70's Merc 500s...

    I'm trying to 'do the right thing' and rebuild the carbs on a '74 Merc 50hp 4cylinder. The motor has sat for three years & I want to be sure I get the gum out of the jets before I run it hard. However on this motor the carbs are buried under a pile of other components. I've removed the front...
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    88hp OMC too cool on one head, OK on other...

    Here's a puzzler (at least to me). I just got a 1988 Johnson 88 SPL. On a test run, the starboard cylinder head is too cold (almost no heat at all after 5 minutes slow, just a bit of heat after 2 minutes full throttle). The port head is just about right - after 5 seconds, you've gotta pull...
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    '66 OMC 9.5 compression 75 & 75 - OK??

    Just picked up a nice 9.5 Johnson fishing motor, 1966. The compression is dead even cylinder to cylinder (75 & 75), but still that seems low. Does anyone have definite knowledge that this is OK? It's not the gauge - it's a good gauge and I am getting 120-135s out of mid-70s OMC V4s. (Maybe...
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