MerCruiser 220-8775 Flywheel GM 4cyl 120hp 140hp 2.5L 3.0L 2778810 3791021
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MerCruiser 220-8775 Flywheel GM 4cyl 120hp 140hp 2.5L 3.0L 2778810 3791021

$80.00
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Item Details MerCruiser 220-8775 Flywheel (used with hub style couplers) Stamped 2778810 Interchangeable with 3791021 / 03781021 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 man 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. Cleaned & Repainted 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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