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MerCruiser 222-4521 Flywheel 3973455N GM 250 6cyl 165hp 4.1L 12-3/4" 153 Teeth

MerCruiser 222-4521 Flywheel 3973455N GM 250 6cyl 165hp 4.1L 12-3/4" 153 Teeth
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MerCruiser 222-4521 Flywheel 3973455N GM 250 6cyl 165hp 4.1L 12-3/4" 153 Teeth MerCruiser 222-4521 Flywheel 3973455N GM 250 6cyl 165hp 4.1L 12-3/4" 153 Teeth MerCruiser 222-4521 Flywheel 3973455N GM 250 6cyl 165hp 4.1L 12-3/4" 153 Teeth MerCruiser 222-4521 Flywheel 3973455N GM 250 6cyl 165hp 4.1L 12-3/4" 153 Teeth MerCruiser 222-4521 Flywheel 3973455N GM 250 6cyl 165hp 4.1L 12-3/4" 153 Teeth MerCruiser 222-4521 Flywheel 3973455N GM 250 6cyl 165hp 4.1L 12-3/4" 153 Teeth MerCruiser 222-4521 Flywheel 3973455N GM 250 6cyl 165hp 4.1L 12-3/4" 153 Teeth
$ 100.00
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Item Details

  • Removed from a MerCruiser GM 6cyl 165hp 4.1L 250CID  From the Early 70's (SN 351XXXX).
  • 12 3/4" Diameter! For 2-piece rear oil seal engines 3.5" across for the stud mounting holes.
  • Yours should look just like this.
  • PLEASE DO NOT BUY THIS WITHOUT CHECKING THE NUMBER STAMPED / CAST ON YOUR EXISTING ONE OR CONSULTING US FIRST. Trust me it will be worth your time and I'll point you in the right direction even if I don't have the right one.
  • Cleaned & Repainted
  • 153 tooth unit. Center hole is 2.5" 12-3/4" Diameter
  • Cast Number is 3973455N
  • If you are unsure if this will work for you, just ask.
  • Purchase with confidence!
Compatibility List
  • MerCruiser 165hp
  • Also has ties to 228hp 305 & 250hp 1977-1978

3781021 8781021 2778809

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