MerCruiser 43-55765A2 Upper Pre R MR Alpha One 1.65 Gearset Gearcase 165hp 6cyl
Item Details
- All MerCruiser 165hp (Inline-6 Cylinder) 4.1L 6cyl applications (165hp) for Pre-Alpha/R/MR/ALPHA ONE Gen 1, so 1970-1982 as a general rule (Gears were found on subsequent years)
- (Actually the actual gears minus the shafts were also used on some Gen II drives 1991-1997)
- The gear set here is MerCruiser 43-55765A2
- (Also equivalent to Sierra 18-2203) & 43-55765A3 & 43-45814A5 (Gears Only – none of the other parts are applicable to the Gen II application)
- 24-24 (tooth count)Â 1.65 Ratio
- 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.
- These are a NOS new set of gears
- These look great and were removed from a completely functional upper gearcase.
- Purchase with confidence!
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