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  1. Scott Danforth

    5.7LX rebuild question

    with a boat that big, I would probably go with a 6.2 (377 cubic inch) https://www.michiganmotorz.com/6-2l-377ci-stroker-base-marine-engine-2000-2019-replacement or you can build it yourself heads https://www.summitracing.com/parts/sum-151124 short block...
  2. Scott Danforth

    Evinrude 115Hp V4 Project Rebuild / Repowering a Fourwinns Fling Turbo jet boat

    The most expensive boats are free, not running and full of water Use a moisture meter to make sure the cored hull is not water soaked
  3. Scott Danforth

    Motor question

    Yes, assuming both are mk4 motors (both should have stamped steel valve covers
  4. Scott Danforth

    Long term reliability?

    My opinion Tahoe doesnt make the motor, so remove motor and controls and treat separate from the boat itself Those types of infantile failures are why there is a warranty process for the motor. Your issue with the tahoe is screws backing out, broken latch and mis adjusted latches. This is...
  5. Scott Danforth

    Valve lifter reassembly SBC

    I soak the lifters in oil (big tuperware container) and then prior to assembly, I cycle the plunger under the oil to expel air and draw in oil since you have a flat tappet block you are putting back together. make sure that if you are using used cam and lifters that the lifters are mated to...
  6. Scott Danforth

    Lower Transom/Keel repair

    ouch the bottom of the hull is wrinkled. that will severely affect performance most likely you will need to pull the motor/drive remove rivets from between the seams straighten out the transom straighten out the bottom re-seal and re-rivet the bits. however I would be calling the insurance...
  7. Scott Danforth

    Motor question

    motors with transmissions are set up different than motors with outdrives the long block is the same, some of the accessories are the same. however exhaust, flywheel housing, and coupler is different. See post #5
  8. Scott Danforth

    5.7LX rebuild question

    where they sonically check the wall thicknesses prior to machining you to know that a new block is less money than a line-hone, re-size of mains, deck, bore and hone of a used block
  9. Scott Danforth

    Why does the 4.3 not rev higher if it's oversquare?

    I have broken buick cranks in a few motors I built over the years...... if you dont break parts racing, your not trying
  10. Scott Danforth

    5.7LX rebuild question

    check with your machine shop, need to run a bore gauge down the holes and do a sonic check every block is different. generally, .060 is doable on most blocks, however core shifts, etc happen
  11. Scott Danforth

    Motor question

    See post #5
  12. Scott Danforth

    25hp compared to 20hp

    depends on the outboards. look at the parts breakdown
  13. Scott Danforth

    Painting Aluminum

    most small aluminum boats are made out of 5052 large aluminum yachts are made out of 5083 or 5086
  14. Scott Danforth

    Penta 4.3 Overheating

    removing the outdrive is an annual service requirement it also makes getting to the fitting I mentioned in post #2
  15. Scott Danforth

    Why does the 4.3 not rev higher if it's oversquare?

    factory GM balancing is +/- 29 grams - lots of shaking going on the 4.3 also has a really bad firing imbalance (look at the crank throws and you get the picture. this is tied to the cam comment above while you can get more RPM out of a 4.3 with a fat wallet, by the time you are done, you...
  16. Scott Danforth

    Motor question

    if your 1990 SR has a Mk 4 motor and not a Gen V motor the long block will swap over (the accessories wont) generally inboards have different flywheel housings, starters, exhaust, etc.
  17. Scott Danforth

    Buying a automotive engine to replace my mercruiser, need opinions

    @2550SX do you have the cam duration and the LSA for the cam? many marine cams are between 108 and 214 lobe centerline, however need to know the overlap (marine engines you do not want any overlap) post the complete cam card with duration at both 0" and the published 0.050" as well as the lobe...
  18. Scott Danforth

    Painting Aluminum

    https://www.finishmaster.com/locations/ look up your local finishmaster
  19. Scott Danforth

    Need Help Installing Distributor in 4.3MPI

    Start with rotor at bottom notch (at 7 oclock), as you drop it in, it will spin around to notch at 3 oclock. May have to spin motor to get dizzy to drop into pump shaft
  20. Scott Danforth

    5.7L 1984, Rough idle at start up, then ok after a minute or so

    I would test the sensor prior to throwing money at it.
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