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  1. Scott Danforth

    Mercruiser 120/140

    your mechanic is an idiot. there is the 1990 and older with the 153 tooth flywheel and the 1991 and later with the 168 tooth flywheel. the mounting patterns on the flywheel housing is the same for all years which is the SBC bolt pattern.
  2. Scott Danforth

    7.4 /454 Gen VI identification

    98 RON is basically similar to 93 R+M/2 here in the US AD is correct on checking the cam.
  3. Scott Danforth

    7.4 /454 Gen VI identification

    the cylinder heads are standard 118cc open chambers. the pistons look to be 20 to 30 cc domes. assuming a .030 overbore. the compression ratio is in the 9.6-10.5 range. which is pushing it with iron heads unless you run high octane.
  4. Scott Danforth

    Why o' why?

    What trouble shooting steps have you done to indicate it is the carbs?
  5. Scott Danforth

    Wiring in 2003 seaswirl striper 2601 Volvo Penta Diesel I/O

    From Volvo Penta. https://www.volvopenta.com/en-us/your-engine/manuals-and-handbooks/
  6. Scott Danforth

    Wiring in 2003 seaswirl striper 2601 Volvo Penta Diesel I/O

    The factory Volvo service manual will have the motor related wiring. Everything else is covered by the ABYC wiring colors you can find in the electrical sticky
  7. Scott Danforth

    cannot get fuel to prime to engine. 1994 ranger 361v

    Is the primer bulb in good condition?
  8. Scott Danforth

    7.4 /454 Gen VI identification

    That motor in the pics is already build well over 425hp Measure the bore to see what you have Post the head casting numbers as AD asked in post #2
  9. Scott Danforth

    Cost of a metal box to hold a large home generator.

    ISO containers are 10', 20', 30' and 40'. If the genny has wheels, it's considered a portable generator and has the CO sensor
  10. Scott Danforth

    Volvo Penta 8.1 gas down tubes

    No soliciting
  11. Scott Danforth

    Astro 1970

    Astro started in 1989 and went out of business in 2003 Astroglass was around in the 70s The paperwork (bill of sale, title, etc) is all you need. Without it, you have a yard planter
  12. Scott Danforth

    Cost of a metal box to hold a large home generator.

    If it's a whole house genny, it comes in the sound attenuated enclosure. The radiator fan will keep air moving past the radiator and muffler If you build one, you need to keep air flow thru the most as the CO monitor will shut it down in a box. It will also overheat
  13. Scott Danforth

    Stock Windshield Height?

    And what are you working on?
  14. Scott Danforth

    7.4 /454 Gen VI identification

    The compression ratio needs to be seriously looked at for a marine build. Forged internals generally not needed unless running WOT for a really long time. A full neutral balance rotating assembly will do more to keep the motor together
  15. Scott Danforth

    7.4 /454 Gen VI identification

    The motor is a lot more HP than the 330 HP L29 Measure the bore. 4.250-4.313 is a 454. 4.470-4.500 is a 502 The pistons are not flat tops, however domed, so the compression ratio is most likely 10:1 or more
  16. Scott Danforth

    Fuel tank mounting

    I would use a cushion on the end. The shape edge will wear thru the tank otherwise
  17. Scott Danforth

    Stringer rotten

    It's most likely a cooler for your beer with a drain
  18. Scott Danforth

    volvo coil design error

    That's more of boat builders not giving crap vs Volvo using a stock GM coil.
  19. Scott Danforth

    Another MPI fogging question

    the fuel pumps simply suck in the fuel and air. there may be a momentary (undetectable) lean fire of a single cylinder or two. however dont over-think it. Now if you do not get a good connection when re-connecting it up and the pump constantly draws in air. that is another issue.
  20. Scott Danforth

    Removing OD Out Drive - It is Stuck

    Hey @Lou C , didnt you have experience with a stuck cobra in your past.
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