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  1. K

    Mercruiser 4.3 adjustments

    So I was able to take the boat out last night 1987 mercruiser alpha 1 gen 1. Started up fine. Let her sit for a couple min then put it in reverse from the dock. The barely went into gear when the motor went full throttle. So get it out on the water and try to get it through its paces. When...
  2. K

    Trouble with alpha 1 gen 1(1987) shifting adjustment

    So recently I took apart the outdrive to do seal job on upper unit and to inspect the lower unit water pump. Had replaced the motor as well. So went to readjust the shifting linkage I'm following the instructions and it says to push in on shift linkage and turn the prop counter clockwise...
  3. K

    Riser gasket help!!

    Looking to order new riser gaskets for my 1987 mercruiser 4.3 V6. With no expansion piece on the riser. The question is what is the difference between the restricted flow gasket and the full flow gasket? Does it matter which one I use? I would assume the full flow one is better as it allows more...
  4. K

    4.3 thermostat

    It has probably been best into the ground but can you run a motor without the thermostat installed? Advantages? Disadvantages?
  5. K

    1987 Starcraft 191 select trim switch

    Need help locating a new replacement trim switch for my Starcraft. The motor is a 4.3 alpha 1 gen 1. The trim lever is in the throttle handle. Everytime I type anything in to a search bar it always comes out with stuff for outdrive or side mounts.
  6. K

    1987 mercruiser 4.3 water in motor help!!!

    Hello everyone, Been looking for help on here since I started working on my boat. Have been able to peice through different threads but now I'm stuck and decided to open up my own thread for help. I have a 1987 starcraft 19ft I/O with a Mercruiser 4.3 the motor originally had an overheating...
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