MerCruiser 43-18411A2 Upper Unit Gear Set V8 305 350 1.50:1 Alpha One Gearcase

• The gears are For All V8 applications for Pre-Alpha/R/MR/ALPHA ONE Gen 1, so 1970-1990 as a general rule.
• (Actually these were also used on Gen II drives 1991-1997 but you would have to swap out the shafts and bearings)
• The gear set here is MerCruiser 43-18410 / 43-18411-1 > 43-18411A2 (Also Equivalent to Sierra 18-2202)
• 20-22 (tooth count) 1.50:1 / 1.47:1 Ratio for V8 GM Chevy 5.0L 305 & 5.7L 350 sterndrive engines. (Early Ford as well)
• Driveshaft and other bearings still installed on this.

• If you have any questions on compatibility, or any other questions about this item, please don't hesitate to contact me.
• The existing bearings are probably fine, but please inspect bearings beforehand to make sure they are to your liking as your races may be different than the bearings here, its always recommended to start with fresh bearings & races when performing this type of service work, but this is ultimately up to your discretion.
• Freshwater Used Parts.
• These look great and were removed from a completely functional upper gearcase.
• Purchase with confidence!

1970 1971 1972 1973 1974 1975 1976 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990

GM 305 350 5.0L 5.7L V8 198hp 200hp 228hp 230hp 260hp