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  1. Scott Danforth

    Info on Mercruiser 0A494867 170Hp engine.

    your mercruiser 470 is a platypus engine it is unique to mercruiser and mercruiser only, and it has been obsolete for over 30 years it is a mercruiser designed block, a mercruiser designed crank, a modified ford 460 head and pistons, a GM flywheel and a mercruiser outboard charging coil and...
  2. Scott Danforth

    Vacuum Gauge Connection

    If there is a port, it would be just aft of the carb on one of the runners. however I believe Mercruiser got rid of that port long ago. It is on the aftermarket intakes and the volvo intakes (edelbrock), however I believe not on the mercruiser intakes as they added threaded bosses for mounting...
  3. Scott Danforth

    Vacuum Gauge Connection

    no, the 357 is a reman'd 350 with between a .030 and .040 overbore (355 to 357 cubic inch) and a 4-barrel carb
  4. Scott Danforth

    Tuning Holley 80551 (4160)

    read your plugs.... what is your secondary jets? what is your spring color? should be the light white. https://documents.holley.com/199r8219-3.pdf
  5. Scott Danforth

    Gelcoat

    I would get non-waxed until the last layer. in the summer, doubt you could move fast enough between coats to not have to sand with waxed gel.
  6. Scott Danforth

    Engine is in, successful run?

    boat could have been setup for high altitude with a 1.62 drive or it could have originally had a 5.0 as SeaRay often paired the 1.62 with a 5.0 easy to determine, pull plug wire, crank engine 10 revolutions, how many turns does the prop make? the 210 for 96-2002 and its smaller 190 sister...
  7. Scott Danforth

    Are Four Winns know to have strong hulls? Installing a tower

    Fourwinns were not designed for the loads of towers. so you have to add reinforcing as needed. not sure backing plates will provide enough reinforcing just as an FYI, on my build, I added braces from the top of the gunwale down to the deck (and the top of my gunwales have 3/8" aluminum plates...
  8. Scott Danforth

    Transferring fuel from truck to garage to dock to boats (PITB)

    so your drinking old style? FYI - case of beer in 12 ounce bottles is 36#, 5 gallon gas in plastic jug is 36#
  9. Scott Danforth

    1995 Mercruiser 3.0 starter will not engage flywheel

    clean every connection from the battery to the starter. by clean, use 150 grit sand paper or a wire brush on the cordless drill and clean them until they are shiny enough your mother would eat off them. if you come across a cable that is crunchy, throw it away then when every connection is...
  10. Scott Danforth

    Another blown head gasket - Fuel Mixture?

    my guess is the tach is way off and you are actually lugging the motor
  11. Scott Danforth

    Mercruiser 350 poor performance

    your low on fuel pressure for both a 2-bar and 3-bar system never re-use a fuel filter (its like putting on a used diaper) re-check your fuel pressure under load at WOT
  12. Scott Danforth

    Timing issue 3.0 TKS

    @achris Grande SA coming out there
  13. Scott Danforth

    Another blown head gasket - Fuel Mixture?

    at 4600 RPM, the motor starts go come apart (literally, the deck starts to flex and the bolts start to loose clamp force) at 4800 RPM, the deck moves a bit more, the head bolts stretch a bit more, the head warps from the crappy design in cooling and the motor spits the head gaskets at 5500 RPM...
  14. Scott Danforth

    Timing issue 3.0 TKS

    pǝʇɐʇs ʇɐoƃ uᴉɐʇunoɯ ɐ uɐɥʇ ɥsᴉɟ ǝɹoW ∀ʞ∀ 'sᴉɹɥɔ∀ ʇɐɥM
  15. Scott Danforth

    Mercury Carbureted vs Fuel injection timeline

    if you look at overall carbon footprint at end of life (the only place it matters), a 1948 chevrolet pickup truck pulling a 18 foot wooden boat with a 75hp merc TOP spewing gas has a smaller carbon foot print over 74 years than a 10 year old prius pulling a row boat. and that truck is still...
  16. Scott Danforth

    Transferring fuel from truck to garage to dock to boats (PITB)

    a 5-gallon can of fuel weighs the same as a case of beer...... consider it cross-training
  17. Scott Danforth

    Mercruiser 260 stern drive serial No. 5384708 knocking sound HELP!!

    first, run the motor without the drive (could be your u-joints and gimbal)
  18. Scott Danforth

    Volvo 5.7gxi-a

    that is good, those pins are worth their weight in platinum no need for the starter, buy new PMGR new flywheel is $55. so its up to you to track down the prior owner. however the exhaust manifolds would also be helpful link to flywheel...
  19. Scott Danforth

    Timing issue 3.0 TKS

    no, you adjust idle separate from timing doesnt matter on the shunt
  20. Scott Danforth

    Tuning Holley 80551 (4160)

    that 600 CFM carb will be a bit small for a 5.7 (considering they installed 600 CFM carbs on 4.3's and 715 CFM carbs on 5.7's) to answer @kenny nunez , yes its a 600 CFM vac secondary 4160 marine carb However you are most likely going lean base on what you are describing best you can do with...
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