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  1. Bt Doctur

    Which gasket is better for impeller install, metal or fiber?

  2. Bt Doctur

    Which gasket is better for impeller install, metal or fiber?

    If you would look at how the pump functions you would see that you need a gasket below and above the ss wear plate to prevent it from sucking air. Look at where the pump lives. At planing speed the pump is above the water line in a cavity full of hot exaust and water exiting the elbows. IT IS...
  3. Bt Doctur

    Bravo Shift Cable Adjjustment

    thats how the guide rod is installed. screwed all the way in and jam nut tightened
  4. Bt Doctur

    Alpha one Gen II upper steering bushing

    let me find the pics
  5. Bt Doctur

    Alpha one Gen II upper steering bushing

    those fittings can be installed without disassembly too. I have a write up and pics in one of my posts and directions
  6. Bt Doctur

    Seal orientation

    The lower seal helps keep water out of the shaft splines ,most are spring upwards. THe upper oil seal must face the gear spring side up
  7. Bt Doctur

    Mercury Inboard taking on water and splashing on engine

    Not knowing what your working on make an answer vert difficult
  8. Bt Doctur

    prop remove to replace seal kit mercury 402 40hp

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

    1987 Mercruiser 350 wiring question

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

    Small drain plug?

    if you tell us whats its for
  11. Bt Doctur

    Bought this boat from Auction need help!

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

    engine pinging and backfires and stalls

    Some type of intake leak causing a over lean condition?
  13. 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
  14. 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...
  15. 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
  16. 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
  17. 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
  18. 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
  19. Bt Doctur

    y pipe leak or something else

    vent hole 6 O Clock bottom
  20. Bt Doctur

    y pipe leak or something else

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