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  1. Scott Danforth

    5.7 Automotive Intake manifold

    boat motors do not wear out. most people panic when they see over 1000 hours. however a properly maintained motor will go over 5000 hours I would not worry about the hours on the boat. bet if you pulled the heads, you can still feel the cross-hatching with your fingernail. there are used...
  2. Scott Danforth

    4.3 Mercruiser ignition control module Thunderbolt IV

    if timing is too far advanced, it would be fighting the motor as well.
  3. Scott Danforth

    4.3 Mercruiser ignition control module Thunderbolt IV

    Look at the troubleshooting guide in the stickies Sounds like plug wires or timing are off
  4. Scott Danforth

    Double engine failure in ten minutes

    Define "orangey" Sounds like fuel is old and turning to sludge with some contamination Good fuel should be almost perfectly clear with a very slight amber/blue hue
  5. Scott Danforth

    Orange peel on gel coat.

    If your thick enough, then keep sanding
  6. Scott Danforth

    Polishing or paint

    wetsand and polish polish and wax should be done every year I would spray gel prior to spraying paint.
  7. Scott Danforth

    Orange peel on gel coat.

    welcome aboard best way is to spray with duratec 904 additive and it lays down like paint did 3-4 layers on the boat in my signature that way prior to sanding. even then, I had to sand (using a DA) with 320, 400, 600, 800, then cut-n-buff However in your case, I would sand completely with...
  8. Scott Danforth

    5.7 Automotive Intake manifold

    I would be tempted to switch to vortec heads since you have to buy an intake. good for an honest 30hp on the 5.7 your looking for the edelbrock 2506 vs the 2516 (vortec)
  9. Scott Danforth

    Fuel gauge always says full. Which variable resistor/potentiometer?

    glad you got to the bottom of the problem
  10. Scott Danforth

    Finishing before gelcoat

    Teleflex became SeaStar. look up the same at SeaStar
  11. Scott Danforth

    5.7 Automotive Intake manifold

    just realized, you have a 1986-1995.
  12. Scott Danforth

    5.7 Automotive Intake manifold

    couldnt have looked too hard - $490 and if you call summit, they will match price https://marineenginedepot.com/edlebrock-intake-manifold-50l305ci-to-57l350ci-performance-with-brass-lining
  13. Scott Danforth

    Finishing before gelcoat

    No, and you answered your own question.
  14. Scott Danforth

    MAG 350 loses power after 20 minutes, need help

    Your minor changes to the SBC won't get you to 50MPH while only turning 3500 RPM unless it's in a truck pulling the boat on a trailer Based on only turning 4000 RPM at WOT in past, you're lugging the motor. Lugging a motor kills them. Prop the boat so the motor turns 4800-5100 RPM at WOT...
  15. Scott Danforth

    Mercruiser 5.0 crankshaft front oil seal replacement

    Yes, auto makers now make plastic intakes, plastic oil pans, valve covers, timing covers. For a vehicle that lasts 4-8 years it's not a problem. However in a boat that lasts 15+, it's a real issue One of the many reasons I prefer to refurb/rebuild vs buy new Luckily the aftermarket SBC...
  16. Scott Danforth

    alpha 1 Gen 2 sterndrive broken lower drive shaft

    Boat that big needs a bravo and a big block. My guess is the drive is at its limit with that large a boat
  17. Scott Danforth

    Fuel tank removeal

    Welcome aboard. Not familiar with all SeaRays Check if there is a deck panel above the fuel tank Also, SeaRay's website has some manuals. Assuming the tank is directly in front of the motors
  18. Scott Danforth

    Correct time to winterize stern drive engine?

    Also drain the big J hose
  19. Scott Danforth

    Mercruiser 5.0 crankshaft front oil seal replacement

    1996 and later motors went plastic. Aftermarket solution is aluminum
  20. Scott Danforth

    Boat reclaim

    Boat without paperwork is a yard ornament
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