MerCruiser 78403A2 Alternator 37 Amp 12V Motorola 120hp 140hp 4cyl 3.0L 1979-89 Bow Rail but is applicable for all

but is applicable for all of the years 1978-1985 as even though there were different housings for mechanical shift 1982-1985 & hydro-mechanical shift 1978-1981

If you are unsure if this will work for your

Chevy / GM

-32-76327 Intake manifold to heat exchanger (MCM)

0393751 / 393751 Crankshaft Assembly

MerCruiser 78403A2 Alternator 37 Amp 12V Motorola 120hp 140hp 4cyl 3.0L 1979-89 Bow Rail but is applicable for allPart Number(s) Included Manufacturer Motorola Stamped Part Number 8MR2024F 8MR2023F Rated Amperage 37 Amp 12V 37 amp Internal Regulator 2 inch mounting foot Equivalent Part Numbers MerCruiser 78403A2 Sierra 18 5957 & 18 5966 General Application Compatibility Found on various mid 80's MerCruiser 4cyl & some BBC 454 models Please check with your parts manual to ensure the indicated part number matches as each alternator is specific to it's surround