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  1. Bt Doctur

    2001 Mag MPI Alpha lugs

    are you absolutely sure you have a 350ci inch 5.7 motor? Almost sure the boat performed well before the cracked block and now it never did. Makes you wonder A 5.0 220 hp cannot turn the gear ratio of a 5.7 .will not allow you to get on plane. A buddy did the same thing .bought a motor dressed...
  2. Bt Doctur

    2001 Mag MPI Alpha lugs

    sounds like you replaced a 5.7 with a 5.0 and you lost about 60 horses
  3. Bt Doctur

    NLA shift interrupt micro switch

    additional research shows that the part number 87-81428A5 is listed as a normally open switch , this type applies a ground to the circuit and this one 8M0052936 is a later type being a normally closed that open a circuit on activating Lots on ebay
  4. Bt Doctur

    NLA shift interrupt micro switch

    Should your switch go bad/not working you can update to the newer style with a small wiring mod. Remove and tape off the Green /White wire .Then go to the purple power wire that feeds the coil positive -remove it and connect to one side of the new switch, connect the other side of the switch...
  5. Bt Doctur

    Mercruiser Cool Fuel Module (Gen III) cooling passages routing question

    https://manuals.plus/m/36a636068f214705e7c0802c87ac41af7c7aa9aabb136ff1d53fa7c0f6b534d9 cool fuel III supplement
  6. Bt Doctur

    Alpha 1 Gen 2 shift question

    I like where it said to replace the very expensive ECM like us boaters have tons of cash. Why not send the ECM out for recalibration?
  7. Bt Doctur

    2005 bravo 3 leak but no leak

    if you find it has oil on it ASK how to remove it first before you snap the plastic fitting
  8. Bt Doctur

    2003 5.7 Volvo Penta water in oil

    the most likely cause is a leaking riser a leaning manifold blown head gasket cracked block from improper winterizatin
  9. Bt Doctur

    3.0 intake interchangeablultu

    it should not be an issue PROVIDING the riser bolts are a match to it
  10. Bt Doctur

    Omc 4.3l won’t stay running after 60 sec

    we would need to know if it has an electric pump
  11. Bt Doctur

    exhaust valve stuck open

    Yes sir, one of the easiest was to ruin a exaust valve, leaky manifold or riser.
  12. Bt Doctur

    Power steering mount

    double check the belt width, most squealing is from the alt pully slipping on the belt. Belt width should be at or slightly above the pully V groove. On my motor it turned out the pully was slightly over width and depth. too deep.pbelt would bottom out and the V section would just slip With the...
  13. Bt Doctur

    Loss of power

    plug condition, firing order correct?
  14. Bt Doctur

    Shimming a gimbal bearing?

    save yourself the destruction and buy a new bearing with the ring already for install instead of trying to get by with just a bearing and not its carrier. you can use a late style , remove the snap ring and everything else in there and install the new perma-lube bearing and install with the...
  15. Bt Doctur

    2001 5.7 GSI stalls on throttle up.

    how low are the compression readings and is there significant blow-by?
  16. Bt Doctur

    What are the symptoms of cracks in an Exhaust Manifold?

    too much cast iron removed from the water passages, these cause water to enter the manifolds/cylinders
  17. Bt Doctur

    Mercruiser 120 will not shut off constant 12v to coil

    disconnect the orange output wire at the back of the alt .If this power is gone the alt is backfeeding
  18. Bt Doctur

    1986 Baretta 3.0 mercruiser

    Most 3.0s that have had a severe overheat usually just blow the head gasket and maybe warp the head. A reasonable repair
  19. Bt Doctur

    gen 2 or gen 1

    If there are 4 nuts and bolts on the side its a GEN II just 2 nuts on the side, a nut up front and 2 nuts below the cavitation plate is a alpha 1
  20. Bt Doctur

    1976 mercruiser 140 carb

    I found a place on ebay that has a new 2bbl UNPAINTED inside and out for under$96 Can pm the item number if your interested, I purchased 2 so far and work perfectly
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