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Description
gear 43 MerCruiser 43-59832A2 Upper Unit Gear Set V8 305 350 1.50:1 Alpha One – NLA MarineItem Details The gears are For All V8 applications for Pre Alpha R MR ALPHA ONE Gen 1, so 1970 1990 as a general rule. (You may need to replace the bearing on top of the shaft depending on whether you have a 1970 1982 vs 1982 & Up application as they each used different bearing sizes) 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 59831 & 43 59832 > 43 59832A2
Item Details
- The gears are For All V8 applications for Pre-Alpha/R/MR/ALPHA ONE Gen 1, so 1970-1990 as a general rule.
- (You may need to replace the bearing on top of the shaft depending on whether you have a 1970-1982 vs 1982 & Up application as they each used different bearing sizes)
- ...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 43-59831 & 43-59832 > 43-59832A2
- This set supersedes to 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
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4.6 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 4
X-Large is about a size 12-13 shoe size foot USA.
Material Type: Black - 3 Pairs, Size: X-Large
I love them they work fantastic. I am a big guy with swollen feet. Wear size 12 to 13 USA Shoes. They fit me just fine not tight. My feet felt good after wearing them for two days. Some dry skin pulled off with them and it says to wash by hand. I dont know about the durability but I am hoping to get about 5 uses per pair. Before they become unusable.
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Reviewed in the United States on February 7, 2026
★★★★★ 5
Comfortable
Material Type: Black - 2 Pairs, Size: X-Large, Material Type: Black - 2 Pairs, Size: X-Large
I have very sensitive skin, so I usually need to wear socks at all times. These are especially comfortable because they don’t cover the toes, which helps with temperature control. The material is well-balanced—not too thick or too thin—and has just the right amount of stretch. I also appreciate the large traction area, which adds stability. Another plus is that they are completely fragrance-free.
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Reviewed in the United States on April 21, 2026
★★★★★ 5
Great Heel Socks
Material Type: Black - 3 Pairs, Size: Large
I don't know how they work but it's wonderful. I've had rough heel problems for a long time. I wear these everyday and my heels are not rough. They're not baby bottom smooth, but they are not ever going to be. These heel socks also oncce they are properly positioned snap onto the heel. Properly positioning them is easy when you put them on your foot with the heel cup in the correct orientation.
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Reviewed in the United States on April 14, 2026
★★★★★ 3
Too small
Material Type: Gray - 3 Pairs, Size: X-Large
Too tight! Even size large used for a man with smaller feet is too tight. Also, no instructions for use or care.
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Good fit
Material Type: Black - 3 Pairs, Size: X-Large
My husband just started using these and they feel comfortable. Hasn't used them long enough to see if his heels are better. He has a high arch so I bought him the XL and they fit perfectly.
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Reviewed in the United States on April 24, 2026