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Thread: Flywheel or Flexplate???

  1. #1
    MISSING
    My engine builder told me he had a flywheel and I bought a power adapter for it. Today he told me he didn't have a flywheel. So he bought the adapter for a flexplate cause its cheaper for him. Is there a difference between using a flywheel or a flexplate? Most importantly is it bad to use a flexplate? Its a big block chevy 550hp. Thanks for your time

  2. #2
    YumaBiesemeyer
    6 one way, half dozen the other. Does not make alot of difference. The flexplate will rev faster. Make sure it is a good one and not a cheap Autozone deal.

  3. #3
    Second "PLACE"
    My engine builder told me he had a flywheel and I bought a power adapter for it. Today he told me he didn't have a flywheel. So he bought the adapter for a flexplate cause its cheaper for him. Is there a difference between using a flywheel or a flexplate? Most importantly is it bad to use a flexplate? Its a big block chevy 550hp. Thanks for your time
    I had a flexplate break on my second trip to the lake with my BRAND NEW 496HO last year. Apparently the gear is "sweated" on instead of welded. While cranking the motor, the flex plate failed on the launch ramp. Outer ring gear slipped off and spun free! Obviously Mercury Marine covered this repair under it's warranty. No problems since.
    Does your builder not recommend a flywheel ?

  4. #4
    MISSING
    Apparently its SFI??? He said its approved for racing (cars), I'm guessing it will be alright...

  5. #5
    LakesOnly
    Apparently its SFI??? You're good to go with your flexplate on your jet boat.
    LO

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