Description
Mercury 12635T Reverse Gear
The Mercury 12635T reverse gear is a genuine OEM gearcase component designed for select Mercury and Mariner 100HP to 125HP 2-cycle outboards. Built for dependable fit and function, this reverse gear is used with a 3-jaw reverse clutch and helps restore proper lower unit operation during repair or rebuild service.
Key Features
- Genuine Mercury OEM reverse gear
- Part number: 12635T
- Old part number: 12635
- Used with 3-jaw reverse clutch applications
- Designed for dependable gearcase repair and replacement service
- Built for reliable fit, function, and marine durability
Fitment
- Fits select Mercury 100HP 2-cycle outboards
- Fits select Mercury 115HP 2-cycle outboards
- Fits select Mercury 125HP 2-cycle outboards
- Fits select Mariner 100HP, 115HP, and 125HP 2-cycle outboards
- Commonly used on USA serial 0B209468 and newer applications
- Also commonly listed for BEL serial 9523034 and newer applications
Product Details
- Brand: Mercury
- Manufacturer part number: 12635T
- Old part number: 12635
- Product type: Reverse gear
- Application: Gearcase service
- OEM replacement component
Why You Should Buy
- Helps restore proper reverse gear function in compatible lower units
- OEM design supports correct fit and dependable operation
- Ideal for gearcase repair, rebuild, and replacement service
- Built for reliable marine performance in demanding conditions
Important Service Note
This reverse gear is used with a 3-jaw reverse clutch. Depending on your repair needs, a pinion and forward gear assembly plus a seal or seal and bearing kit may also be required.
Common Applications
Commonly used as a replacement reverse gear for compatible Mercury and Mariner 100HP to 125HP 2-cycle outboards during lower unit repair or rebuild work.
FAQ
What does this part do?
This reverse gear provides reverse drive function inside the gearcase on compatible outboard applications.
What engines does this fit?
It fits select Mercury and Mariner 100HP, 115HP, and 125HP 2-cycle outboards using a 3-jaw reverse clutch. Always confirm fitment by serial number before ordering.
Is 12635 the same as 12635T?
Yes, 12635 is the older part number and 12635T is the updated part number.
Is this a genuine OEM Mercury part?
Yes, Mercury 12635T is a genuine OEM reverse gear.