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  1. Bt Doctur

    prop remove to replace seal kit mercury 402 40hp

    maybe in this manual https://www.manualslib.com/manual/1198862/Mercury-40.html
  2. Bt Doctur

    1987 Mercruiser 350 wiring question

    goes to the trim gauge and the trim sender wires go there
  3. Bt Doctur

    Small drain plug?

    if you tell us whats its for
  4. Bt Doctur

    Bought this boat from Auction need help!

    I`d be leery about all those plastic thru hulls
  5. Bt Doctur

    engine pinging and backfires and stalls

    Some type of intake leak causing a over lean condition?
  6. Bt Doctur

    Noob question: where does the sea water enter the engine?

    At what point in the system does the water enter the water circulating pump? And does it exit the pump via the big rubber hose into the T-stat housing? Google gm v8 cooling systems
  7. Bt Doctur

    Noob question: where does the sea water enter the engine?

    If you locate a online manual those questions are answered From the drive, thru a ps cooler, to the thermostat housing , thru the engine and manifolds and out the exaust elbow There are many methods, some good ,some bad. Most flush and fog the motor till it stalls. Remove drain plugs and probe...
  8. Bt Doctur

    switching out lower unit on Mercruiser MC-1 - what to look for?

    the old is 1 .65 and the other is 1.98 so you will need a higher pitch and/or diameter
  9. Bt Doctur

    2005 VP 5.0Gxi 2500-3000rpm max. Low pressure Pump 0 psi

    you would be surprised how well MR44LTS work too in these engines too also BPR6EFS
  10. Bt Doctur

    Small hole warm water exit lower drive unit opposite drain plug.

    that is a drain hole for the shift shaft cavity. water from there could mean a leaking water pump /impeller housing/etc
  11. Bt Doctur

    Trick to get alternator belt off on the water 3.0l mercruiser

    you tie the spare belt to the front mount out of the way
  12. Bt Doctur

    y pipe leak or something else

    vent hole 6 O Clock bottom
  13. Bt Doctur

    y pipe leak or something else

  14. 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
  15. 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
  16. 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
  17. Bt Doctur

    Oil filter for Volvo Penta 3.0, 1998

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

    Volvo Penta 4.3 Gi Conversion to 4.3 GL

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

    2001 496 HO - IAC 99% Missing 1000 RPM

    injector issue?
  20. 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...
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