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  1. Bt Doctur

    New elbows on a 5.7 LX.

    I think it is because of the 3 point and single point drain systems. Theory is it drains everything and no need for any drain plugs. That is until it clogs and you lose a block and/or manifolds
  2. Bt Doctur

    Trim hose to pump

  3. Bt Doctur

    New elbows on a 5.7 LX.

    or use one that has the drain plug
  4. Bt Doctur

    Possibly Purchasing 70s Mercruiser 140... Overheated

    your going nowhere with 140 hp in a 29 toon
  5. Bt Doctur

    3.0L Manifold Removal- Frozen

    If you remove ALL 5 bolts comes off very easily
  6. Bt Doctur

    IN SERIOUS NEED of spark plug wire help 5.7

    The flat cap found on Crusaders and some others will accept wires that go into the cap and also the round cap. The next design has them going ON the cap ,the brass end protrudes up on the cap. The latest flat cap takes a special plug that goes into the cap but looks nothing like a standard boot
  7. Bt Doctur

    Bravo 3 bell housing removal. (lube leak)

    replacement is still plastic, cut the hose before removing the housing, then with a razor knife slit the hose at the transom fitting and remove it
  8. Bt Doctur

    Fuel gauge issues

    Is this gauge a stand alone or does it have 4 combined together cause your diagram makes no sense
  9. Bt Doctur

    IN SERIOUS NEED of spark plug wire help 5.7

    he may have the flat cap instead of a round one. the dist end is completely different, cap,rotor, and wires from the gm K1500 also will work
  10. Bt Doctur

    Trim hose to pump

    older ot not, I`v never seen that type on a merc pump from any year might need to replace the trim hoses with oem
  11. Bt Doctur

    Marvel Mystery oil in a 2004 5.0 engine

    it no mecanic in a bottle but my f250 went over 400K using it in both gas and oil
  12. Bt Doctur

    SX-M Gimbal Bellows Spring

    it supports the bellow,
  13. Bt Doctur

    MC-1 New Shift Cable Won't go Through?

    just cant pull it thru, it has to pass thru a small hole in the transom housing .Once thru the shift bellow, just feel your way thru but be careful not to enter the flywheel housing
  14. Bt Doctur

    Fuel gauge issues

    In the 4th pic polarity does not matter Most show Black as the hot. but unit should work in either direction.For the gauge, Blue is lighting, Purple is ign power, Black is ground, Pink to sender
  15. Bt Doctur

    looking for a service manual

    OMC 502Aphue put that in your search bar ,you will see the link
  16. Bt Doctur

    4.3 tb IV no fire from coil

    sparkplug firing order correct?
  17. Bt Doctur

    Electric fuel pump issues

    I install a priming button either on helm or engine compartment. Aids in refilling the fuel filters
  18. Bt Doctur

    alpha one gen 2 install lower driveshaft

    I can only add it somewhat confusing. when inserting the prop shaft on an angle you catch the shift selector ,(the "C" shape) in the shift spool, straighten the prop shaft and see with the shift rod in a straight line the prop shaft turns ccw when turning the lower drive shaft cw
  19. Bt Doctur

    Mercruiser 165 4 cylinder running hot

    I`ve heard of people placing the guide tube on the copper tube and miss the pump top
  20. Bt Doctur

    Single point drain winterization

    its a 3 way fitting ,no can do
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