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  1. Scott Danforth

    Question on 30 year old boat

    Generally, there are no manuals for boats. Only about 12-15 boat manufacturers out of about 250,000 ever provided manuals Which drive do you have, the 280 or 290? Looks like a SP290. Is your hydraulic actuator servo valve sticking? The motor is an AQ 230 which is a GM 305 with a holley carb...
  2. Scott Danforth

    Water in oil, could this be the issue?

    If you boat in salt water, exhaust manifolds last only 7-10 years max. The manifold to elbow gasket joint fails and leaks water down the ports Not to mention the intake manifolds rust thru
  3. Scott Danforth

    Water in oil, could this be the issue?

    Most likely its bad exhaust manifolds However if you had the plug in and water got as high as you say, your starter is now junk, or will fail very soon, and if the alternator was under water, that will fail too. So will any wire harness that was under. Doubtful water got in the crank case...
  4. Scott Danforth

    Volvo 290DP Trim will go down not up

    Then check the relay at the gauge (not the two at the pump)
  5. Scott Danforth

    fuel pump frustration

    Carter 4389 is about $85
  6. Scott Danforth

    Transom replacement

    I usually cut the transom oversized before gluing and trim after. But I have done it both ways I pour the glu on and use a v-notch trowel to spread the glue, I start clamping in the middle. Most oozes out
  7. Scott Danforth

    Transom replacement

    use tite-bond 3 to glue the wood together use drywall screws to clamp - insert on the aluminum side of the piece once dry, remove the screws
  8. Scott Danforth

    How is capacity plate attached?

    most likely they used rivets that were too short to reach all the way thru the fiberglass. maybe they were in a hurry and wanted to do a half-fast job
  9. Scott Danforth

    Disintegrating rivets

    generally no, not directly. there usually is a volt or two potential difference between the hull and the battery ground. power heads and engines are usually rubber mounted, so there is that isolation. it when people assume they can use an aluminum boat as a ground that most of the time...
  10. Scott Danforth

    Vp aq270

    yes, better design than the gimbal bearing. from an engineering perspective, its brilliantly simple.
  11. Scott Danforth

    Overheated water shutter debris removal

    Running without water you burned all the rubber bits between the elbow and the drive This is the rubber hoses, the rubber bellows and the rubber on the flapper. So get to replacing the rubber bits
  12. Scott Danforth

    Volvo 290DP Trim will go down not up

    What angle is the drive at? If more than 8 degrees, you need to trigger the finger switch and the thumb switch
  13. Scott Danforth

    1992 Mercruiser 4.3 w/ balance shaft and 1 piece rear main seal swap to newer year Vortec.

    about $500. truck heads are $850 a pair new, more if you buy them as "marine" litterally the exact same part. comes out of the same parts bin in Tonawanda engine plant. some light reading: https://forums.iboats.com/threads/complete-history-of-the-4-3-liter-with-casting-numbers.693935/
  14. Scott Danforth

    electronic ignition 3.7 lx (470)

    FWIW....I have had 100% of the pertronix kits I ever bought fail. I have never been stranded by a set of points. however prior to ripping anything out, simply ground and unground the coil repeatedly and every time you unground, the coil should fire.
  15. Scott Danforth

    VP 5.0 to 5.7 high idle

    running the 5.7 on a 5.0 calibration means the motor will be running lean. even with the electric toilet on top (TBI) make sure the throttle cables are not holding the throttle open.
  16. Scott Danforth

    Disintegrating rivets

    there should not be any connection between the electrical system and the boat.
  17. Scott Danforth

    Need help with my 3.7l mcm 180

    buy a new SEI drive
  18. Scott Danforth

    Need help with my 3.7l mcm 180

    power steering pulley on a power steering pump
  19. Scott Danforth

    Mercury wear pads missing cause of vibration?

    if the motor is severely out of alignment, you can get a vibration. hence the reason I asked when the motor was last aligned
  20. Scott Danforth

    Disintegrating rivets

    did you add any electronics or electrical? if so, did you ground anything to the hull?
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