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  1. Eric 3.7LX Alpha 1

    1993 mercruiser 4.3lx dies after a few minutes

    What he said ^^^^^^^
  2. Eric 3.7LX Alpha 1

    Carb advice, please.

    That's not getting into the fuel bowl and jets in the carb where the sediment will be, you will be wasting your time. Watch these couple of videos:
  3. Eric 3.7LX Alpha 1

    Carb advice, please.

    Ethanol gas is what does it. It's when it's allowed to sit, and separate, and cause corrosion. Run non ethanol gas, and you won't have problems with the fuel system. The gas tank in your boat is vented, the gas tank in a car is sealed, and that makes a difference why cars don't have problems...
  4. Eric 3.7LX Alpha 1

    3.7 mercrusier 165 horse engine

    Yes there are, and it sounds like what he has. Some older inboard engines ran opposite rotation when there were twins. All sterndrive engines turn the same as automotive.
  5. Eric 3.7LX Alpha 1

    3.7 mercrusier 165 horse engine

    That's what it sounds like. The starter should be a CW starter, and the engine is CCW. Here is a link to a page from Arco marine, who makes electrical components, to help determine which you have there. The wear on the starter gear should be on the left side of the gear for a CW starter...
  6. Eric 3.7LX Alpha 1

    3.7 mercrusier 165 horse engine

    In order for us to help advise you, we need to know what that engine is connected to, between it, and the propeller. Using Achris' photo, what set up do you have? It is not an outboard.
  7. Eric 3.7LX Alpha 1

    1968 mercruiser boat

    Read this from the "Adults Only" sticky at the beginning of this forum. Stop in there and check out all the other good info... How To: Troubleshoot a Points Ignition System https://forums.iboats.com/threads/how-to-troubleshoot-a-points-ignition-system.328601/
  8. Eric 3.7LX Alpha 1

    1968 mercruiser boat

    No it wont be.
  9. Eric 3.7LX Alpha 1

    3.7 470 amazing

    That's called torque... from that large 4.36 bore. There's no replacement for displacement. lol
  10. Eric 3.7LX Alpha 1

    3.7 mercrusier 165 horse engine

    Engine rotation is determined by observing flywheel rotation from the rear of the engine looking forward. Propeller rotation is not necessarily the same as engine rotation. This engine will be/should be a left hand rotation. The Distributor rotation will be clockwise looking top down with...
  11. Eric 3.7LX Alpha 1

    Push rod

    You could take one of the other pushrods off, and use it in the bent rods place just to measure the clearance, and see if the same size will work in that cylinder.
  12. Eric 3.7LX Alpha 1

    Push rod

    See the link I have attached from another poster with the same issue: https://forums.iboats.com/threads/3-7-mercruiser-push-rod-questions.623870/
  13. Eric 3.7LX Alpha 1

    Question about whether to leave boat in drive or not

    My 15 hp Mercury 4 stroke manual recommends putting it in forward when trailering to prevent the prop from spinning freely. Will it cause any damage if left to spin in the wind, I doubt it, but that is what it says. I would not put my sterndrive in gear while trailering or left sitting on the...
  14. Eric 3.7LX Alpha 1

    Replaced rubber impeller now won't shift to neutral??

    No... It won't work right. They both have to be in forward.
  15. Eric 3.7LX Alpha 1

    Replaced rubber impeller now won't shift to neutral??

    Since you left the upper half bolted up still, have the shifter in the boat in forward gear. Look in the front of the drive you will see the shift shaft I'm referring to... It should be pointing straight ahead. The splined shift shaft on the lower half gets rotated clockwise while turning the...
  16. Eric 3.7LX Alpha 1

    Mercruiser 5.0 dies while idling - no fuel from line

    Better than a fuel pressure gauge, is a fuel pressure/vacuum gauge. Something like a Craftsman 282179, which is an old part. You can put the gauge before the pump also and it will show a restriction with increased vacuum.
  17. Eric 3.7LX Alpha 1

    Mercruiser 3.0 electronic ignition, no spark

    Wade1969 hasn't been on here since this last post. You should start your own thread for your engine and problem.
  18. Eric 3.7LX Alpha 1

    Alignment help!

    The term stern refers to the back of the boat not the drive. You could use the terms: sterndrive, drive, outdrive to refer to the drive. Your drive should be a MC-1 model. There should be a round lift ring built into the top cover of the drive.
  19. Eric 3.7LX Alpha 1

    Change Trans Fluid on a 1978 470 MerCruiser

    Your outdrive model is called a MC-1. It was made before the Alpha One drive, many call it a pre-Alpha, but there were a few models before the Alpha One so the correct name is best. I have an MC-1 as a spare, and have some photos of where the serial number would be. The engine should have a...
  20. Eric 3.7LX Alpha 1

    Change Trans Fluid on a 1978 470 MerCruiser

    I cut the side out of a gallon sized Prestone antifreeze container, and squeeze it under the drain plug, and drain mine by gravity, it just fits. There is no transmission. It should be bolted to an outdrive as I don't think the 470/3.7's were used on inboards. What's the serial number of the...
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