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  1. Scott Danforth

    1996 Volvo Penta 7.4 will not stay running

    carb?, injected?
  2. Scott Danforth

    No spark plug spark... 170 MC , 1985 Sea Ray

    you have a bad wire to the I/R terminal on your starter. start with the factory service manual and follow the wiring schematics.
  3. Scott Danforth

    2003 SeaRay 200 Bowrider seized engine????!!!!

    Need to know what is wrong with the OP's motor first. could be something minor, could be major. hasnt been back since he started this thread.
  4. Scott Danforth

    Specific paint for outboard motor?

    factory mercury paint is PPG / Ditzler 9000 black
  5. Scott Danforth

    Specific paint for outboard motor?

    you will get better results if you use straight rustoleum, mix in some hardener and spray with a real spray gun that way you get a hardened finish with out the rattle can zebra stripes
  6. Scott Danforth

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    are they balancing the motor?
  7. Scott Danforth

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    stock blocks with roller cams do not have the machined fuel pump boss. you want a roller cam. they could fly-cut the mounting surface and drill the hole for the push-rod and oil return
  8. Scott Danforth

    No spark plug spark... 170 MC , 1985 Sea Ray

    no, the boat uses a 1.5 ohm coil requiring a balast resistor for running and gets full 12 volts when cranking via the I/R terminal on the starter. that is the way the boat is wired.
  9. Scott Danforth

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    so..... what heads will you be running? that is where you start with the determination of piston. the next question is new or used block to determine bore and deck height
  10. Scott Danforth

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    keep the compression ratio about 9.4 and dont worry about the fuel.
  11. Scott Danforth

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    you need the quench pad. make sure the final quench distance is in the .040 range are they using a used block, or a new block? the GMPP blocks have the mechanical fuel pump boss machined. the stock GM blocks do not.
  12. Scott Danforth

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    and this is
  13. Scott Danforth

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    that isnt a D-shapped piston. this is
  14. Scott Danforth

    Mercury 7.5 steering arm bracket help

    when I swapped power heads on my 9.8's to give me an electric start shorty for the hellion, once I had the power heads off, swapping steering stuff was easy.
  15. Scott Danforth

    What´s the best replacement for AQ271C (or 570) 5.7 GM engine, ideally stroker?

    you pick the pistons based on the combustion chamber shape of the heads, stroke, compression height, deck height and rod length. The KB D-shapped recess with 2 reliefs is a LCQ style piston when used with a vortec combustion chamber. if they are starting with virgin blocks, deck height is a...
  16. Scott Danforth

    Mercury 7.5 steering arm bracket help

    to me it would be easier.
  17. Scott Danforth

    Mercury 7.5 steering arm bracket help

    isnt it easier to pull the 6 nuts and remove the power head, then unbolt the steering arm, and get a new power head gasket than removing the mounts?
  18. Scott Danforth

    hello new guy here

    regal medalion years are 1984-1989. http://boatspecs.iboats.com/Regal_Boats__Medallion__Medallion_185/bp/43br1373s3978m25599 guaranteed there is issues with the stringers and transom on a 32-37 year old boat. especially any boat made in the 80's
  19. Scott Danforth

    Spark plugs, Volvo numbers don't match

    volvo doesnt make spark plugs, they buy them. they assigned a part number to the AC plug that came in the motor from GM to begin with. should be AC delco MR43-LTS The M stands for Marine (stainless body) the 41-993 is an iridium spark plug with a nickel alloy body. it will be fine for the...
  20. Scott Danforth

    No spark plug spark... 170 MC , 1985 Sea Ray

    without proper dwell time, the magnetic field can not build properly, therefor the energy is not there when the points open and the quality of spark suffers. some high end multi meters can do dwell functionality using the % duty cycle function, however you have to do math.
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