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  1. Scott Danforth

    Are Impellers Unique?

    Yes, impellers are unique to manufactures
  2. Scott Danforth

    1989 Mercruiser 5.7 slight overheating at lower RPMs

    Start with a new impeller check raw water flow
  3. Scott Danforth

    1989 Sea Ray 160

    Do the diagnostic work before throwing parts at it
  4. Scott Danforth

    Mercruiser 5.7 won’t make power

    That cam pulls more torque from 1500 RPM to 5200 than stock cam. It's not the cam unless you washed out the lobes Carb is a bit small, however should get you to 4400 rom under load You do need to verify fuel pressure under load You do need to verify TDC with a piston stop tool You do need...
  5. Scott Danforth

    1989 Sea Ray 160

    Look at the fuel system
  6. Scott Danforth

    Mercruiser 5.7 won’t make power

    marine carb will have a port in the plenum. there is none on the engine something is wrong with the dizzy or TDC on the balancer is not TDC on the engine or you are starving for fuel - see post #16 additionally, with a flat tappet cam, you need to run that motor at 2000 RPM's for 20...
  7. Scott Danforth

    Rusted clogged cooling lines in the block 5.7 merc alpha 1 gen 2

    if the block is that rusted, it may not be long for the world however, with that stated, here is what I have done. with a large tub, a submersible sump pump (or a pond pump), vaporust or oxalic acid pull the outdrive off put tub under the stern of the boat and fill with vaporust or oxalic...
  8. Scott Danforth

    1988 Invader 240 aft berth instrument panel

    trace the wiring for the rest
  9. Scott Danforth

    Ford 302 alternator proper amp size

    that is the problem with single wire alternators. turn the battery off with the battery switch
  10. Scott Danforth

    Mercruiser 5.7 won’t make power

    simple test done with a piston stop tool if you dont have a piston stop tool, make one: take an old spark plug and knock the electrode out of it, then weld a nut on it and use a bolt with a rounded end. plenty of how-too's on the web. using the piston stop tool turn the engine by hand (from...
  11. Scott Danforth

    1988 Invader 240 aft berth instrument panel

    flip them to see what comes on. should be the following: (not in any order) nav lights, horn, bilge blower, bilge pump (auto/manual), accessory. or chase the wiring
  12. Scott Danforth

    Mercruiser 5.7 won’t make power

    not changing RPM means that something is limiting RPM either fuel supply, such as the fuel tank anti-siphon valve, etc. or ignition. with the engine under load, what is your fuel pressure at the carb inlet? try running the engine from a 5 gallon outboard fuel tank if you have one holley...
  13. Scott Danforth

    Taking my 1984 LaveyCraft out of moth-balls

    there are two shift cables. the one from the controls to the ESA unit. and the lower one. the lower one, the best place is probably at the only OMC stringer specialty site. http://sterndrive.info/ or if you find an dealer that used to service OMC that may have a NOS one
  14. Scott Danforth

    Mercruiser 5.7 won’t make power

    Try a 17p prop or a 15. Make sure you verify the drive ratio Toons are a different animal. Have you measured the SWL to riser height? How is the cam installed? Straight up, 4deg advanced, or 4 degrees retarded? Vortec motor and that cam should be closer to 10-12 degrees of base timing...
  15. Scott Danforth

    Tilt trim motor getting hung up

    welcome aboard. sounds like the brushes in the motor need maintenance.
  16. Scott Danforth

    Mercruiser 4.3 ThunderBolt - Need help summerizing

    looks like an anode for exhaust or a heat exchanger the anode looks like it needs changing too
  17. Scott Danforth

    Bearing grease / water leaked out on rim

    your seal is shot. pull the bearing and the hub and look
  18. Scott Danforth

    hot Coil

    this means that there is power to your coil. did you leave the key on, or did someone mis-wire the boat?
  19. Scott Danforth

    hot Coil

    welcome aboard coils do get warm, about 175 or so. which is too warm to put your hand on. if you have points, there should be a resistor
  20. Scott Danforth

    Mercruiser 3.0 diagnosis / serial number decode

    dwell is 32 degrees
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