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  1. Bt Doctur

    1989 OMC 4.3 Trim and Tilt Cylinder rebuild question

  2. Bt Doctur

    What is this reservoir for? Coolant? Where does the line run to?

    and if empty you have a leak that needs fixing
  3. Bt Doctur

    Harmonic Balancer pulley of Mercruiser 3.0 replacement

    running the serial numbers you list there both bolt on pullys
  4. Bt Doctur

    Can't trim up ?

    If you can trailer up the pump and solenoids are working ,whats not working is the trim limit switch on the transom. Locate the black lamp cord type wire ,unplug from the pump and jumper the pump side with 2 male connectors
  5. Bt Doctur

    Alpha I SN6749102 Outdrive Lower Unit. Can't lock prop in FWD to re-attach to Upper

    If you rotate the prop ccw in fwd then the drive shaft should be turning ccw also. If this is not the case the lower unit is somehow been damaged/broken
  6. Bt Doctur

    Alpha I SN6749102 Outdrive Lower Unit. Can't lock prop in FWD to re-attach to Upper

    I used vice grips to turn the drive shaft and break it free, and now it turns easily clockwise and CCW. Should not turn easily because of the impeller and you should only turn it in a clockwise direction When shifted in FWD or reverse, and prop turns as it should. However, when I shift it to...
  7. Bt Doctur

    Impeller replacement after engine overheating - 3.0L Mercruiser

    impeller is toast along with the top cover, One item looks like part of a exaust shutter
  8. Bt Doctur

    1988 Alpha one Gen one lower unit

    moisture in the gear oil is not good, if the unit was drained and left empty the bearings could have rusted. Remove the pump top cover and the shaft must turn by hand. If not something got seized
  9. Bt Doctur

    Engine water flow issue

    Impeller - brand new (key is in it, lol) it spins freely with the shaft Once installed in the housing its very hard to just turn by hand. Most cases are from clogged exaust risers
  10. Bt Doctur

    1988 Alpha one Gen one lower unit

    oil based products will destroy rubber. If you removed the impeller and it still wont turn the lower unit is damaged
  11. Bt Doctur

    89. Mercruiser engine swap problems

    #1 cylinder on compression stroke, rotate engine until timing mark on balancer is at at 6 degrees, install dist pointing to #1 in the cap or if cap is not marked point to #1cylinder , time accordingly. recheck compression readings, check for correct firing order It works better if you tell us...
  12. Bt Doctur

    Coupler alignment

    all depends on your front motor mounts, how you removed the old engine and how you swapped the motor mounts to the new motor It your mounts are slotted ,loosen the lags/bolts loosen the rear mounts, and shift the motor, then retighten and recheck
  13. Bt Doctur

    Lower gear oil drain plug seal for Johnson outboard

    a impact is the worst thing to do
  14. Bt Doctur

    alpha one gen 2 bellhousing broke at exhaust bellow mount (nipple?)

    you sure its a bellow and not a sleeve?
  15. Bt Doctur

    1986 Four Winns Horizon 190, Carb Linkage?

    a Rochester normal operation is primary with a choke plate, the plate in the rear is the secondary and the actual throttle plates that open are below the plate your moving with your fingers https://www.carburetor-parts.com/rochester-quadrajet-carburetor-complete-guide
  16. Bt Doctur

    Emergency Starter Solenoid

    its a solenoid crossover to connect the batterys together for emergency starting. A isolated base solenoid will do the job
  17. Bt Doctur

    1993 Mercruiser 350 Ski Magnum carbed oil type

    with high zinc for flat tappets, I see better oil pressure and lower temps using it .
  18. Bt Doctur

    Electric Steering for 2005 Volvo Penta?

    SeaStar hydrolic system
  19. Bt Doctur

    1993 Mercruiser 350 Ski Magnum carbed oil type

    Rotella15 w-40
  20. Bt Doctur

    Old Bravo3 Outdrive Reassembly problem connecting gear oil line

    I attach the hose to the brass nipple first and I use a hose 2 inches longer than factory. install the housing and using some Power-Tune and a special hose pliers simply CAREFULLY push the hose on the plastic nipple. Its a very tight fit and have found that no clamp is necessary
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