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    84 SeaRay Merc 470 vacuum lock

    Took the boat out yesterday after addressing some issues with coolant leakage. Boat ran great, temps were good. We stopped and swam for 30 minutes and the motor wouldn't start, the way it was sounding I suspected no fuel, checked fuel, there wasn't any, in the carb, in the fuel pump, in the line...
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    84 SeaRay 470 Mercruiser blowing anti-freeze

    So I've done quite a few things to try and fix a problem I've had with this 470 motor. When we were out on the lake last weekend it overheated and started blowing antifreeze out of the radiator cap. I've pulled the outdrive and confirmed the impeller is great, I've pulled the hoses off the heat...
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    Proper radiator cap for 3.7L

    What is the proper cap for this motor? What is the psi? The one that's on it is a vented cap, the overflow is full and not flowing back when the motor cools.
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    Mercruiser MC-1 trim will not go down

    I took the fittings off the cylinders and I still have to stand on the drive to get it to go down. The cylinders are real stiff, is this normal?
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    1984 Sea Ray with dreaded 3.7 problems

    I just bought a 1984 19 foot Sea Ray with the dreaded 3.7 motor. I wish I would have discovered this forum first. Took it out on the water and sure enough it overheated, I shut it down immediately. After investigating these forums, I looked into the raw water pump and it's brand new, the motor...
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