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  1. Scott Danforth

    Intake port cc question for 5.7l sbc

    best bang for the dollar is to call machine shops near dirt tracks and oval tracks. a used set of heads, ready to go with screw in rockers studs modified valve guides, etc. all set up for about $400 a set. any machine shop that serviced the track would have had a few dozen sets on the shelf...
  2. Scott Danforth

    Surge brakes lasted 1200 miles of highway, whats wrong

    good point
  3. Scott Danforth

    How to Switch to Antifreeze Cooled Engine

    look at it from our confusion post #1, you are calling it a 1960's something SeaRay with a 301 Then in post number 22 its a 1982 boat with a 5.7 since the owner is deaf, my guess also original owner making him well above retirement age. that new motor with only 50 hours on it could have...
  4. Scott Danforth

    Just 3 Words

    Screw in tire Big #14 one missed my meeting its cold here
  5. Scott Danforth

    Surge brakes lasted 1200 miles of highway, whats wrong

    what brand of calipers? what brand of master cylinder? at highway speeds, there is enough air flow that if you are draging your calipers slightly, you wont heat the hubs a loose damper may cause the brakes to come on and release a bit. however only if the trailer is bucking where in florida are...
  6. Scott Danforth

    How to Switch to Antifreeze Cooled Engine

    if the block is fresh water only, then yes, you can clean the debris (rocks, sand, small fish, seaweed, etc) if the block has been run in salt, no.
  7. Scott Danforth

    Holley Dual Feed Fuel Rail/Log Question

    if you didnt kink the tube, you are fine. its glorified brake line with chrome plating
  8. Scott Danforth

    Longer steering cable

    the rack doesnt care how it sits, however many are horizontal-ish I agree with Bondo that a rotary may be better for the narrow center console
  9. Scott Danforth

    How to Switch to Antifreeze Cooled Engine

    coming from a prior life were we built heat exchangers for Volvo Penta and Mercruiser (along with John Deere, Cummins, Cat and others). the gap between the tubes in the bundle on a heat exchanger are between 0.02 inches and 0.040 inches depending on which tube size, and bundle spacing. the...
  10. Scott Danforth

    Used boat I might buy

    condition is king on any boat that is not brand new.
  11. Scott Danforth

    Holley Dual Feed Fuel Rail/Log Question

    Marine rated means its metal factory installations are custom fabricated assemblies. I have re-made them a few times. Mercury Racing had the two lines coming together near the center of the carb for the HP500 motor. you can flip the line around to go aft and re-route the fuel line if needed.
  12. Scott Danforth

    Spider Cracks Repair

    like doing body filler. suggest a few layers and sanding in between
  13. Scott Danforth

    Wiring diagram for 5.7 GSi PEFS? Or AQ271C? Ideally both?

    each of the engines use standard wiring colors about 10" upstream of the trappezoidal shaped connector is a standard 8 pin harness adapter. just buy a different 8-pin https://forums.iboats.com/threads/generic-boat-wiring-information-updated-verified.726970/ here is the trim wiring for the 271C
  14. Scott Danforth

    How to Switch to Antifreeze Cooled Engine

    if your motor was fresh water only, there may be a chance, however you do need to pull the motor out get it on the stand to clean out the cooling water passages if the motor was ever in salt water, too late, rust is already forming on the insides of the block, and those rust flakes will come...
  15. Scott Danforth

    Spider Cracks Repair

    the paste is just thickened gel, used primarily for fixing chips. you spread it like body filler. you can add a bit of styrene or even just a dab of acetone to thin it
  16. Scott Danforth

    Removal / Fitting Duoprop

    Volvo Penta also sells prop grease
  17. Scott Danforth

    MerCrusider Fuel Rail - is there an alternative?

    the 8.1 was in the 3/4 and 1 ton trucks from 2001 to 2008. AD posted the part number. however the parts are on national back-order meaning do not hold your breath. However, the factory fuel rail has issues. one is they rust out in a marine environment. the biggest one is they restrict the...
  18. Scott Danforth

    Spider Cracks Repair

    did you get gel or paste?
  19. Scott Danforth

    MerCrusider Fuel Rail - is there an alternative?

    Welcome aboard. the best source to answer your question is Raylar. They would know since they are the Gen VII / 8.1 liter specialists for marine power adders, and they may have take-offs of the fuel rails. give them a call. https://www.raylarengineering.com/
  20. Scott Danforth

    Inboard replacing

    need to tune the vent sizes, try smaller and open up as needed.
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