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  1. Scott Danforth

    Mercruiser 5.0 TKS vs 4.3 MPI

    No, i have been involved with engines and turning wrenches since I was 3. Definately not thinking MPI. I know the limitations of EFI vs Carb, I know the benefits, limitations and realities. Prove to me that EFI adds more power. Having been involved with EFI motors since the 80s, unless you...
  2. Scott Danforth

    Automatic bilge pump

    I wont click on any PDF's for security reasons. however if you had it linked to the attwood site, then maybe I would. many OEMs have a switch that in one position is automatic (being feed by the batteries direct) and the other the manual side. most available schematics are only the engine...
  3. Scott Danforth

    5.0L MPI Idle Air Control Valve OEM vs Aftermarket

    its threads like this that make me glad I have a carb......
  4. Scott Danforth

    speedo gauge wrapped around.

    no way enough air coming in the pitot tube would spin the speedo around. because of the density difference of air and water, you would have had to be towing about 230mph in air to read about 50mph on the speedo. most likely the bordon tube in the speedo simply broke or the spring came...
  5. Scott Danforth

    Considering a swap

    I would build a pair of 377's or use used blocks and build 383's
  6. Scott Danforth

    Automatic bilge pump

    the float switch is what makes it automatic. the float switch goes up when water is in the bilge and then the pump comes on...... the water level drops and the float switch drops, shutting the pump off. some of the "sensing" bilge pumps cant get the last bit of water out of the bilge so they...
  7. Scott Danforth

    Volvo Penta 5.7 AQ271C Electric Fuel pump coversion

    put a dab of grease on the fuel pump push rod, holds it in place
  8. Scott Danforth

    Volvo Penta 5.7 AQ271C Electric Fuel pump coversion

    'cuz the V6's are a little daft....LOL:p:p:p:p:p:p:p
  9. Scott Danforth

    Mercruiser 5.0 TKS vs 4.3 MPI

    the 5.0 is an SBC. any SBC powered boat that comes with a 2 barrel cast-iron intake such as the 220hp can be upgraded by bolting on a 4-barrel intake in either cast-iron or dual-alloy aluminum. I suggest the edelbrock marine intake and the edelbrock 1409 marine carb. that will take the 220hp...
  10. Scott Danforth

    Two Trolling motor on one Inflatable boat

    the OP never mentioned trolling or fishing. only that they wanted to go faster with two trolling motors. generally a "trolling motor" usually electric as Jim mentioned. nothing was ever stated about fishing or trolling until Sea Rider made that assumption in post #3 until the OP comes back...
  11. Scott Danforth

    Best adhesive remover?

    just so you are aware, your 1978 fiberglass tri-hull most likely has soft transom and stringers as well as water-soaked foam - especially if it was exposed to the elements for several years like you mention. your carpet may be the least of your issues. if you have to replace the transom and...
  12. Scott Danforth

    Volvo Penta 5.7 AQ271C Electric Fuel pump coversion

    it is a carter marine pump, it is $49 on Summit's site, and most importantly, why do you want or think you need to change it? they will last for about 4000 hours on the boat with minimal maintenance (like not sinking the boat)
  13. Scott Danforth

    Volvo Penta 5.7 AQ271C Electric Fuel pump coversion

    I wouldn't do it unless you replace the block and there was no mechanical pump pad available. first, the mechanical fuel pump is 100 times more reliable than the electric. secondly, with electric you need either an oil pressure switch and relay or you need to run off the AC tap if you have it...
  14. Scott Danforth

    Best adhesive remover?

    I have tried the following (in about this order): acetone lacquer thinner mineral spirits isopropyl alcohol paint stripper gasoline carburetor cleaner brake cleaner simple green 409 freon (cans of keyboard cleaner to try to freeze it and bust it off) 2" metal scraper razor blades heat gun the...
  15. Scott Danforth

    Mercruiser 5.0 TKS vs 4.3 MPI

    internal combustion engines used in boats burn 0.4# of fuel per HP per hour. so two motors at exact same hp will burn nearly the exact same amount of fuel (slight variations engine to engine prevent it from being exactly the same). there is no fuel savings on a 220hp V6 vs a 220hp V8. you can...
  16. Scott Danforth

    Best adhesive remover?

    wear heavy clothing, a face shield and goggles as well as a respirator. you will get bits of wire in your skin otherwise. have the shop vac hose close by for dust control.
  17. Scott Danforth

    Best adhesive remover?

    4-1/2" angle grinder with a wire cup brush. there isnt a solvent made that will work if they used the right adhesive.
  18. Scott Danforth

    OMC manual/service/how to

    the one and only source for factory OMC manuals https://www.outboardbooks.com/brand/OMC/ the manual will have everything you need. Not sure where you would get a GM service manual for the industrial only engine used in marine service. mostly there was only parts manuals.
  19. Scott Danforth

    Engine removal with boat in the water

    caution, you may have opened yourself up to ridicule for that..... BTW, many of us are engineers....... And I have the picture of me driving the train to prove it..... LOL going off experience as well as personally knowing the engineers at Volvo, Mercruiser, PCM, Indmar, Ilmor, etc. as well...
  20. Scott Danforth

    Pro or amatuer hull repair?

    my first thought is the original in-dash depth finder was a 2" thru-hull fitting and they removed it.
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