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  1. Bt Doctur

    470 trim pump leak

    reverse valve not adjusted properly
  2. Bt Doctur

    Motor out of alignment

    To leave room for adjustment have atleast 1 inch above the top nut. To actually set the exact height you will need ,tighten the rear mounts ,support the front of the engine by the lift ring on the thermostat housing and raise or lower the front if the engine until the alignment bar goes in...
  3. Bt Doctur

    Is My Impeller Bad? Mercruiser 228

    Imperller is totally wasted, and the pump base is also damaged from overheating. If the video is of you on a hose the high rpm destroyed the impeller. On a hose your limited to about 1500 rpm max or impeller gets destroyed
  4. Bt Doctur

    1988 4.3 ltr engine starter wiring

    Remove the exaust manifold, then you gain access to the starter wiring and bolts
  5. Bt Doctur

    1984 Merc 120 trim sender plug location

    the limit switch wiring goes directly to the trim pump , there are 2 bullet connectors at the pump wiring blue/white and purple I think
  6. Bt Doctur

    1984 Merc 120 trim sender plug location

    trim sender is the brown and the other side goes to a ground
  7. Bt Doctur

    Engine Fire

    Vents have duct hose on them so no real entry into the eng compartment Got lucky it worked
  8. Bt Doctur

    Volvo penta trim pump circuit breaker

    only if you have the system that raises both drives at the same tine but you have switches to lower each one separately
  9. Bt Doctur

    Repair Manual for newer MerCruiser 4.5L 250hp

    https://www.simmercury.com/service-manual-8m0119305/
  10. Bt Doctur

    Which way does a Mercruiser MIE 260 distributor spin?

    except for a reverse rotation motor, dist turns CW, crank turns CCW An aft entry starter is just the reverse of a block mounted starter
  11. Bt Doctur

    Which way does a Mercruiser MIE 260 distributor spin?

    all gm dist turn clockwise
  12. Bt Doctur

    Merc 120 shift interrupt issue

    the switch never operates on land, if it does the lower shift cable is bad
  13. Bt Doctur

    1984 Mercruiser GM 350 engine no start, not even trying to fire

    A aft mounted starter like for a inboard? If Yes, starter rotation is just the opposite of engine rotation. All gm dist turn clockwise even the reverse rotation engines. So if Aft entry, a standard rotation motor uses a reverse rotation starter and a reverse rotation motor uses a standard...
  14. Bt Doctur

    Merc 5.7, alpha 1 gen2, Rochester marine 4bbl flood gushing up out of bowl/float vent!?!

    check the fuel pump pressure
  15. Bt Doctur

    Noisy water pump? 4.3MPI

    Well, when was the drive off for service last? Is there any water leaking into the boat?
  16. Bt Doctur

    Intake manifold gasket replacement advice and tips

    Only thing I do different is use PermaTex Aviation sealant around the water ports and gasket area around the water ports.and the intake bolts ,and a generous amount of Black RTV on the front and rear of the block. The oil leaks from the intake manifolds Only 3 places for that to happen, the...
  17. Bt Doctur

    sudden grinding noise then stallked.

    Oil was changed after last season and i didn't bother checking, Your really supposd to check the fluids EVERYTIME you start the motor the first time.
  18. Bt Doctur

    Noisy water pump? 4.3MPI

    Take the belt off first, no need to buy anything yet. Simply turning the circ pully by hand will tell you if it is the problem
  19. Bt Doctur

    1988 4.3 ltr engine starter wiring

    Why do people take things apart without pictures? Why do people do things without a manual?
  20. Bt Doctur

    Alpha Gen II Oil Supply Line Cracked and Leaking

    I have done this on a Bravo twin. Had to make some special tools and buy the special hose pliers. Make sure you cut the hose first
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