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  1. Bt Doctur

    impeller in need

    I`ll try to explain it When you installed the lower did the shaft socket connect with the splined lower shaft? Did you place the lower unit if fwd gear ? Rotate the lower splined shaft untill the prop is locked in a CCW direction, this is fwd gear. If you go past that point continue to rotate...
  2. Bt Doctur

    Worth flame arrestor upgrade for Mercruiser engines?

    a metal one will also works just as well, try ebay https://www.ebay.com/itm/185462659926?epid=11017011131&hash=item2b2e6f9b56:g:t-kAAOSwq-1ipomS
  3. Bt Doctur

    Boat switch panel and mystery button

    If the motor now runs, remove 1 wire and see if it still runs. If No ,its a man overboard safety switch that has a red lanyard on it. Usually uses a purple ign feed wire
  4. Bt Doctur

    correct plugs and wires for points type distributor on 140 engine

    unless the coil is rated for the full 12v and does not say on its side "use ballast resistor" it used full 12v because the coil is internally ballasted
  5. Bt Doctur

    Merc 350 sputters, dies, won't restart after heating up

    plug in a outboard tank and retest.
  6. Bt Doctur

    Timing chain & camshaft replace

    Yes, oil pan should be lowered instead of cutting the gasket,especially if a one piece neoprene type ,you need 3 feet in front to do the cam Intake manifold off, valve covers off, loosen and remove push rods, pull lifters out , timing chain and cam gear.
  7. Bt Doctur

    Merc 350 sputters, dies, won't restart after heating up

    Remove the fuel pickup tube from the tank, unscrew the tube from the 90deg fitting , remove the stent filter
  8. Bt Doctur

    Making sure I purchased the correct coil for a 1996 5.7L

    JB weld can fix that lol cold water on a hot valve will pucker it. But it could e worse
  9. Bt Doctur

    Have 2000 sea ray 190 signature cuddly 5.0 L. Trim goes down and trailering works but not up. Any ideas what’s wrong

    trim limit switch is bad
  10. Bt Doctur

    Cracked 5.7 engine

    did you probe the holes to remove the scale and rust clogging the drains? without draining and just pouring AF in the hoses is useless
  11. Bt Doctur

    Mercruiser 470 service manuals

    A few things to check remove dist cap, bring balancer to the 0 mark , watch rotor and turn motor backwards. Note how many degrees before the rotor moves. This will determine how much slack is in the tining chain and gears. Next verify #1 TDC . TDC and timing mark on balancer should agree. If not...
  12. Bt Doctur

    Belt length for 470 Alternator conversion

    contact the seller, I installed 2 of these but gave the paperwork to the customer...
  13. Bt Doctur

    Volvo Penta | Holley Carb Leak - Fuel Line Connection

    And tell the Butcher yo use the correct line wrench not vise grips
  14. Bt Doctur

    Is it the engine coupler that has gone bad?

    with motor off, shift into full fwd. prop should lock ccw. stand on a blade while someone watches the input shaft. Prop turns,shaft turns=coupler issue. Prop turns ,shaft does not= drive issue
  15. Bt Doctur

    4.3 electric fuel pump no power. Puzzled…

    testing voltage is fine but where are you testing for the ground side?
  16. Bt Doctur

    Serpentine belt pulleys

    Being a serpentine belt application if the pully moves, the pump or idler/tensioner is bad
  17. Bt Doctur

    Mercruiser 3.0 Exhaust Riser Leak / Compatibility?

    If you only have two threaded holes in the manifold you need a riser for the 3.0 LX It uses two bolts only
  18. Bt Doctur

    Alpha one gen1 water coming from lower shift shaft.

    that leaking from the top of the water pump ,slinger missing?
  19. Bt Doctur

    New lower shift cable

    If it was working before and now its not, recheck your installation. Did you bottom out the shift cable in the housing? Did you set the screw in the shift slide correctly? Does the shift slide bottom out in the housing? Is the guide sleeve threaded all the way into the outer sheath?
  20. Bt Doctur

    New lower shift cable

    You could tell us what your working on
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