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  1. Scott06

    Hole shot, Mercruiser 4.3L

    In a similar situation with my old boat ( worse on power -3.0) i used Michigan vortex 4 blades 18” fir cruising, 16” fir skiing. saw better holeshot, sternlift and lower planning speed than with my 19”&17” three blades. alternatively i bought all my ss props used off ebay. Took a couple years to...
  2. Scott06

    1990 vs 1992 4.3 block swap

    Sounds just like my 5.0 dont worry about it. Might be exhaust flapper nothing with engine. These pushrod V engines are not super quiet. Either turn up the radio, add more throttle, or drink more beer. Any combo of the three makes noise go away….
  3. Scott06

    seriously need some experts help on this one, no water exits manifolds

    Great to hear.
  4. Scott06

    Slow plane at high altitude 5.0L MPI, please help

    Yes dropping pitch 2” will be basically the same as swapping a 1.62 drive. go through all the checks suggested and verify tach if all is good drop pitch .
  5. Scott06

    boat storage

    Dry slip seems nice as long as it allows for sour of the moment use . How long in advance do they need to get your boat in the water ?
  6. Scott06

    Risers - think I caught this just in time?

    I dont think that is from cooling water more likely condensation. The dry joint manifold prevents the leakage potential by separating the water and exhaust passages. also dont see any water streaks on them just rust and soot.
  7. Scott06

    2002 Mastercraft 5.7 harmonic balancer moving in and out

    broken and using it for a door stop. I think you will have a door stop too unfortunately...
  8. Scott06

    2002 Mastercraft 5.7 harmonic balancer moving in and out

    You can use GM parts or aftermarket crank intended for a chevy vortec 5.7 from a place like summit racing or jegs
  9. Scott06

    2002 Mastercraft 5.7 harmonic balancer moving in and out

    That is the crank moving- did you break the crank ? what is the history here either way motor needs a tear down to find out
  10. Scott06

    new 5.7 vortec parts

    put the right amount of oil in and find out. You can make a new mark as needed on the old dipstick with a hacksaw....
  11. Scott06

    new 5.7 vortec parts

    Id call them they were not really good responding to emails in my experience until I spoke with some one about the replacement engine, yes frustrating from a customer perspective... You will be getting a nice increase in power probably have to go up in pitch on the prop assuming it was propped...
  12. Scott06

    new 5.7 vortec parts

    Was your older engine a non vortec or older two piece RMS? I think this would probably work but you may want to call mich motorz to make sure https://www.michiganmotorz.com/5-7l-dipstick-tube-assembly I have a similar jackalope engine with out a serial number as I took out a 4.3 and put in...
  13. Scott06

    Gear Ratio?

    Yes. Qbouys boat has 5.0 mpi w a 1.47 drive. In my sea ray 200 (heavy and beamy) the drives were the following based on engine - 4.3 carb 190 hp - 1.81 4.3 mpi 220 hp- 1.62 5.0 carb 220 hp - 1.62 5.0 MPI 260 hp- 1.62 When I repowered from a 4.3 carb=>5.0 with 4 bbl carb and intake (260 hp) I...
  14. Scott06

    Crank, no spark. Need advice.

    any TB module will in theory work on any TB distributor... The catch is the wiring connections. if the connectors between existing wiring and proposed module work then yes , if not you have to splice and rewire. Not knowing what connections you have / are trying to connect its not possible to...
  15. Scott06

    Gear Ratio?

    Also i believe some 5.0 powered boats came with a 1.62 drive from factory. My boat and three of my neighbors were factory shipped with 1.62 drives if equipped with a 5.0 carb or mpi.
  16. Scott06

    Standard vs metric

    the 4.3 that was original to my boat was a 4.3 that was metric. Not sure why gm did it this way but the side motor mounts, starter bolts, and flywheel cover bolts were metric, all other fasteners were US. ordered the correct US starter bolts online, a trip to the hardware store for correct...
  17. Scott06

    MerCruiser 4.3L V6 milkshake oil from cracked intake manifold, how to remove milkshake oil?

    Once you get it back together pressure test the cooling system to make sure there are no other cracks. If ok use mineral spirits or kerosene, crank it on starter drain and then get it running and change oil repeatedly until clear. You can let it idle on 3 qts of cheap oil, change oil and filter...
  18. Scott06

    3.0 engine temp never gets over 160 F

    Whose service manual are you using? Get a factory one if you haven't already. Pay attention to where your temp gauge sits now - as the impeller in the drive ages you will see the idle temp creep up, or at lest I did on my 3.0. Bottom line get used to knowing where they should be
  19. Scott06

    3.0 engine temp never gets over 160 F

    No marine engines run cooler than automotive applications. On a 140 thermostat 150 is normal. This helps with mineral deposits from the open cooling system and also at normal car temps in an open (non pressurized) cooling system it keeps cooling water from boiling
  20. Scott06

    New valve cover gaskets and still leaking V6 4.3

    Take it off put rtv on both side of gasket and reinstall is cover cracked ? Are u using new seals on bolts in center of valve cover
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