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  1. Bt Doctur

    y pipe leak or something else

    Check to see if it coming in from a hole directly under the inmputshaft. If yes ,the water inlet O ring is damaged /dislodges and water is being forced into the main bellow
  2. Bt Doctur

    Hard to turn crank while rebuilding GM 350

    mic the journals, install the bearings in the caps and torque to spec, mic the ID of the bearings
  3. Bt Doctur

    y pipe leak or something else

    that is the water inlet fitting, has nothing to do with the Y pipe. clamp loose or split hose or clamp tightened way to much and kinked the plastic fitting
  4. Bt Doctur

    Oil filter for Volvo Penta 3.0, 1998

    The short gm inline 6 230 or 250 cu inch works just fine
  5. Bt Doctur

    Volvo Penta 4.3 Gi Conversion to 4.3 GL

    Follow the Red lines, there you will find the problem.
  6. Bt Doctur

    2001 496 HO - IAC 99% Missing 1000 RPM

    injector issue?
  7. Bt Doctur

    Mercruiser 165 shift cable bellows

    It can be changed if your replacing the shift cable with the newer rear entry type without disassembly. Cut the old cable remove the front entry retap with the straight tap, Before removing old core , remove the cable and insert a control cable solid core to the bellow area. remove old...
  8. Bt Doctur

    1996 Horizon 220 5.0Fi raw water pump issues.

    If the pic of the impeller also has the front pully it looks like the rotation is backwards. pump and pully rotate clockwise for a standard rotation engine
  9. Bt Doctur

    Swapping out ujoint splines?

    your serial number come back as Find MerCruiser 120 GM 153 I / L4 1972-1978 Engine & Stern Drive by Serial Number Range ans shows the inputshaft as 39385A1
  10. Bt Doctur

    Swapping out ujoint splines?

    Is this the same drive that came off and was any work done to it? Did you check the alignment with an alignment bar? Is the length of the inputshaft the same?
  11. Bt Doctur

    Gear Lube Hose

  12. Bt Doctur

    Thrust washer issue

    https://www.perfprotech.com/mercury-marine-parts-catalog/collection/01/mercury?category=15-hp#hp-table
  13. Bt Doctur

    Hunting for Gen 1 SN

    without the inner small ring you must use the rolling torque method or find a small ring and install it and then just torque it
  14. Bt Doctur

    79' Merccruiser 260 fuel pushrod question

  15. Bt Doctur

    79' Merccruiser 260 fuel pushrod question

    I have used a fuel pump blockoff plate and the original bolts to mount the bracket for the pump. In most cases you can still use the steel line to the carb by adding the correct fitting. You can use the Carter style or the mercruiser low pressure electric one. Iboats has the pressure switch and...
  16. Bt Doctur

    Hunting for Gen 1 SN

  17. Bt Doctur

    Hunting for Gen 1 SN

    If your the original owner is this a GEN II ?. If the upper gears were replaced the new type says leave it out and use rolling torque method. I prefer to leave it in place and just torque the nut down. Serial number should be visable in the mercruiser decal If the decal has been replaced ...
  18. Bt Doctur

    Gear Lube Hose

    inside the boat or outside the boat
  19. Bt Doctur

    Thrust washer issue

    https://www.marineengine.com/parts/mercury-quicksilver-propellers/page79.html whats your engine serial number and what is that part number have never seen one like that with a stem on it
  20. Bt Doctur

    Mercruiser mpi ecu mapping

    trying to get a 5.0 to perform like a 6.2 is just nonsense
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