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