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  1. 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
  2. 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
  3. 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
  4. 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
  5. 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...
  6. 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
  7. Bt Doctur

    Lower gear oil drain plug seal for Johnson outboard

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

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

    you sure its a bellow and not a sleeve?
  9. 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
  10. 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
  11. 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 .
  12. Bt Doctur

    Electric Steering for 2005 Volvo Penta?

    SeaStar hydrolic system
  13. Bt Doctur

    1993 Mercruiser 350 Ski Magnum carbed oil type

    Rotella15 w-40
  14. 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
  15. Bt Doctur

    Snapped the dreaded Mercruiser transom Drive Lube Fitting....

    I have replaced it without removing the housing or drive Turned fully to the post side there is JUST enough room. Easiest way I have found is remove the manifold, the pin going to the steering arm (A PITA) , remove the locking tabs from the cylinder mounting bolts, possible using a adjustable...
  16. Bt Doctur

    Install a used engine from one seller and outdrive from another not a matched set

    There is no need to kick a drive on, properly adjusted you can push the drive on to within a 1/8th inch. do you have the old mount with the double wound washer or the newer mount with the thin flat washer?
  17. Bt Doctur

    4.3GL VP Fuel Pump Issues

    with a lot of fuel pump issues, I have changed them to the mercruiser design using a oil pressure switch, wired thru the cube relay.
  18. Bt Doctur

    Bent push rods….calling engine builders

    would be more helpful posting a engine serial number too
  19. Bt Doctur

    Mercruiser 3.0L LX - Black Smoke / Rough Idle

    make sure the choke is opening fully
  20. Bt Doctur

    lower shift shaft positioning for gear selection

    This is the correct way it turns. If yours is reversed the shaft was not located correctly when the drive was split, If this is a Alpha GEN II counter rotation than what you describe is correct split the drive, turn the splined shaft fully clockwise while turning the prop CCW This is forward...
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