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  1. Scott Danforth

    Am I missing a step in gear lube swap?

    besides the beer or three, you may have to switch hands doing the pumping.
  2. Scott Danforth

    Is it a 283 or 307 ?

    BTW, 3.875" bore and 3" stroke is 283, 3.875" bore and 3.25" stroke is 307 move to a 4" bore and 3.25" stroke and you have 327
  3. Scott Danforth

    1989 Volvo Penta AQ271c cooling system

    if you are concerned about the power steering cooler, pull it out and have it pressure tested. they are a simple pile of plumbing tubing and parts.
  4. Scott Danforth

    Is it a 283 or 307 ?

    the only official source for OMC manuals https://outboardbooks.com/
  5. Scott Danforth

    Is it a 283 or 307 ?

    clymer manuals make really bad toilet paper, and worse manuals.
  6. Scott Danforth

    Propeller swap Volvo dp 290 and newer dps outdrive.

    no. you can use A series (for diesels), B series (aluminum for petrol engines), C series (stainless versions of the B series), and the J series (new design supposed to replace the B series.
  7. Scott Danforth

    Mercruiser 5,7 speed

    Start with a compression test
  8. Scott Danforth

    1989 5.7 350 Mercruiser ignition replacement help - possible upgrade to DUI unit

    I would look at a Delco Voyager dizzy over the DUI
  9. Scott Danforth

    how to pressure test the fuel

    You buy the mercruiser fuel test fitting
  10. Scott Danforth

    Mercruiser 140 Points to Delco EST results in low RPM at WOT

    The motor has the same architecture. The same bad head design. The same bad combustion chamber. Your old points dizzy was set to 4 degrees of base timing with a maximum advance of 24 degrees for a total timing of 28. The est dizzy will adjust up to 28 degrees.
  11. Scott Danforth

    Mercruiser 5,7 speed

    What RpM are you turning?
  12. Scott Danforth

    Water in 4 cylinders

    To get water in cylinders @ 3200 RPM means something else failed first
  13. Scott Danforth

    Mercruiser 140 Points to Delco EST results in low RPM at WOT

    Timing with est is -1 degree ,( the Dizzy takes it from there). Max timing on an inline motor is about 28 degrees
  14. Scott Danforth

    Mercruiser 140 Points to Delco EST results in low RPM at WOT

    The 3.0 is limited on how far you can advance the ignition. Exceed the limit and the motor eats itself
  15. Scott Danforth

    Gas tank pressure fueling up!! 🤬

    Check your tank vent line. The vent itself is fine from your description also check the fill line
  16. Scott Danforth

    1990 MeriCrusier 3.0

    Did you file them, did you set the dwell with a meter? Did you reset the timing
  17. Scott Danforth

    Mercruiser 140 Points to Delco EST results in low RPM at WOT

    That marble sound is most likely detonation which is your motor eating itself
  18. Scott Danforth

    1990 MeriCrusier 3.0

    Did you service the points?
  19. Scott Danforth

    Just need to know what wires go to what?

    You can't just splice into your system without adding a bunch of diodes
  20. Scott Danforth

    I'm lost

    Pull the drive and address your impeller Overheating is a lack of water flow
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