Pay in installments of $30.00 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Sep 5 - Sep 10
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
MerCruiser Lower Unit Gearcase Gear Set Carrier 43-878087A4 Alpha One 1983-1990Item Details MerCruiser Sterndrive Alpha One Lower Unit Complete Gearset 43 878087A4 (Pinion, Forward, Reverse) Used in MerCruiser MR & Gen I lower units 1983 1990 These are the correct gears if your lower gearcase DOES NOT HAVE A PRELOAD PIN on top of the driveshaft ****If your gearcase HAS A PRELOAD PIN, then these are not the correct gears***** If you are looking for a 1970 1982 Gearset please contact me and I should be able to help. Pinion Gear
Item Details
- MerCruiser Sterndrive Alpha One Lower Unit Complete Gearset 43-878087A4 (Pinion, Forward, Reverse)
-
Used in MerCruiser MR & Gen I lower units 1983-1990
- These are the correct gears if your lower gearcase DOES NOT HAVE A PRELOAD PIN on top of the driveshaft
- ****If your gearcase HAS A PRELOAD PIN, then these are not the correct gears*****
- If you are looking for a 1970-1982 Gearset please contact me and I should be able to help.
- These are the correct gears if your lower gearcase DOES NOT HAVE A PRELOAD PIN on top of the driveshaft
- Pinion Gear (17 Teeth): 43-42932 (Same as 43-89060)
- Forward Gear (28 Teeth): 43-42933 ( Sometimes Stamped 17064-6022)
- Reverse Gear (28 Teeth): 43-42934 / 43-824109A1
- Bearing Carrier 73020 / 73020C / 73020A14
- This was the earlier style Bearing carrier, but it will still fit in the drive from this time period. You just have to use the Tab washer included.
- Tab Washer 14-79447 (For use with 73020C Carrier)
- Retainer Screw 79448 / 83201127
- Don't worry too much about the numbers here as the numbers changed, but the gears didn't 1983-1990
- Used but in great shape!
- I highly recommend that the bearings that are included (still attached to the gears) should be replaced. However it is up to your discretion as to whether or not bearings should be replaced.
-
Application
-
For MR & Alpha One Gen I Units which have the pre-load pin in the top of the drive shaft. (If your unsure what this means, just ask)
- This gear set will not work in a MC-1/Pre-alpha & R gearcase (I apologize for the redundancy of this statement)
-
They used the same lower gearcase with all of the engines 1983-1990 so you're particular engine is not a factor here so this basically covers most (120hp 140hp 4cyl 165hp 6cyl 170hp 305 350 470 260hp 2.5L 3.0L 4.1L 3.7L 3.8L 4.3L V6 205hp 185hp 5.0L 5.7L V8 etc...
-
For MR & Alpha One Gen I Units which have the pre-load pin in the top of the drive shaft. (If your unsure what this means, just ask)
- Freshwater Used Parts
- Purchase with confidence!
Relevant Part Number List
- 43-878087A4
- 18-2206-1 Sierra
- 18-2407
Please inspect pictures closely to to ensure product satisfaction.
1983 1984 1985 1986 1987 1988 1989 1990
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 26 reviews
Sort
Product Reviews
★★★★★ 5
AMAZING
This lotion smells so good and is very moisturizing. helps keep my skin soft and silky all day long.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 10, 2025
★★★★★ 5
Great products
Scent: Peach Hibiscus Bundle, Size: 26 Fl Oz (Pack of 2)
Product smells delicious and works great.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 15, 2025
★★★★★ 4
Missing pump top makes it difficult to use...
Scent: Pomaberry, Size: 18 Fl Oz (Pack of 1), Scent: Pomaberry, Size: 18 Fl Oz (Pack of 1)
I love the smell and the way it feels on my skin but I'm not sure how I'm going to access it without the pump top. I'm not sure if it broke before shipping or if a piece was not included in the shipment but there is no way to pump the lotion out of the bottle as it is now. I'd seen other reviews about issues like this but when mine arrived in a box I thought I was in the clear, I was not. I'd love to have a bottle with a pump attached so I could use the lotion easily as intended without having to find another container to put it in.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 25, 2026
★★★★★ 5
Great Lotion!
Scent: Original, Size: 18 Fl Oz (Pack of 1)
Great lotion! Leaves skin feeling hydrated!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 1, 2025
★★★★★ 5
great smell and provides moisture
Scent: Cookie Bundle, Size: 26 Fl Oz (Pack of 2)
I do enjoy the smell, haven't used the body wash however. would recommend but not my fav. but does smell great. does keep skin soft. smell is very attractive. i use it after tanning. i like different lotions different times of year and this would be my summer/fall smell
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2025
recommand products
Wilwood Dynapro Radial4 / MC4 Rear Kit 12.88 Drilled 2006-15 Miata w/Lines & Cables
1144.27
The Real Book Volume III Second Edition E-flat Instruments | 400 Jazz and Standard Songs for Alto Sax, Baritone Sax, and More | Lead Sheets for ... Leonard Songbook (Real Books (Hal Leonard))
66.09
Envy Tattoo Cartridges & Needles — Box of 10
16.39
Miami Heat 2025 City Edition Pom Knit Hat
37.99
Los Angeles Rams 2025 Inspire Change Split Panel 9FIFTY Snapback Hat
35.74