MerCruiser 220-8775 120hp 2.5 140hp 3.0L Heavy Duty Flywheel 2768972 12-3/4" New Parts Extension Housing: 307179

Extension Housing: 307179

Stamped part numbers are 98704 & 98703

Reverse Lock Push Rod (short shaft): A-25190

This was used on 1974-1994 Various 35hp

Cast# 436-4422 or 36-4422 (same)

MerCruiser 220-8775 120hp 2.5 140hp 3.0L Heavy Duty Flywheel 2768972 12-3/4" New Parts Extension Housing: 307179MerCruiser 220 8775 Flywheel Assembly 12 3 4" Diameter! 153 tooth (2 Piece Rear Main Seal Applications) 3. 5" Diameter Across Between the bolt holes. GM Part stamped # usually GM 2768972 2 (this is the earlier version that does not have holes for triangle coupler only found on Pre 1983 models with hub style coupler) or GM 3790366 (later version with the holes for perimeter mount triangle coupler) This is the heavy duty model of flywheel it does have