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MerCruiser 220-8775 Flywheel GM 4cyl 120hp 140hp 2.5L 3.0L 3791021 3781021

MerCruiser 220-8775 Flywheel GM 4cyl 120hp 140hp 2.5L 3.0L 3791021 3781021
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MerCruiser 220-8775 Flywheel GM 4cyl 120hp 140hp 2.5L 3.0L 3791021 3781021 MerCruiser 220-8775 Flywheel GM 4cyl 120hp 140hp 2.5L 3.0L 3791021 3781021 MerCruiser 220-8775 Flywheel GM 4cyl 120hp 140hp 2.5L 3.0L 3791021 3781021 MerCruiser 220-8775 Flywheel GM 4cyl 120hp 140hp 2.5L 3.0L 3791021 3781021 MerCruiser 220-8775 Flywheel GM 4cyl 120hp 140hp 2.5L 3.0L 3791021 3781021 MerCruiser 220-8775 Flywheel GM 4cyl 120hp 140hp 2.5L 3.0L 3791021 3781021
$ 80.00
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Item Details

  • MerCruiser 220-8775 Flywheel (used with hub style couplers)
    • Stamped 3791021 (which sometimes looks like 3781021)
      • Interchangeable with 2778810
  • 12 3/4" Diameter! NOT FOR V6 or V8 applications!
  • Used from 1970-1989 on virtually all MerCruiser 2.5L & 3.0L 120hp 140hp GM 4cyl applications
  • Only for use with 2-piece rear main seal engines (1989 & Before)
    • It was roughly 1990 when they switched over to 1-piece rear main seal engines will measure 3" across between the bolt holes on the crankshaft vs. this one which measures 3.5" across.
  • Yours should look just like this.
  • 153 tooth unit. Center hole is 2.5"
  • If you are unsure if this will work for you, just ask.
  • Purchase with confidence!
Compatibility List
  • MerCruiser 120hp 2.5L / 140hp 3.0L 1969-1989

3781021 8781021 2778809


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