SEI Gear Bushing Late Series (Mercury Compatible)
The SEI Late Series Shift Bushing is specifically designed for Mercury Outboard Motors, replacing the original OE# 858934 reference code part. It is manufactured from heat-treated steel to ensure smooth gear shifting in the gearbox and to transmit the clutching motion between the shaft and the forward/reverse gears without wear.
Late Series Shift Bushing Advantages and Features
- Precise Engagement: Components such as the clutch dog and shift cam ensure smooth and play-free gear changes.
- High Surface Hardness: Subjected to a special case hardening heat treatment to make it resistant to friction and wear.
- OEM Tolerances: Manufactured to micro-tolerances that will not disrupt precise internal gearbox alignment.
Technical Specifications
| Brand | SEI (Aftermarket / Replacement) |
| OEM Reference Number | 858934 |
| Compatible Systems | Mercury Outboard Motors |
| Product Group | Gearbox Shift and Gear Parts (Gears) |
Application and Use
Worn clutch dogs and shift components should be replaced if there is gear jumping, difficulty shifting, or clunking noises from the gearbox.
Maintenance and Installation Recommendations
Metal shavings found in the gearbox oil indicate worn gears or clutch dogs. After installation, the shift cable free play must be precisely adjusted.
Frequently Asked Questions
What is the difference between a late series and an early series bushing?
Mercury made revisions to the shift mechanism during the production process; choosing the wrong type will lead to incompatible installation. Confirm with your engine serial number.
Is this part an equivalent of an OEM number?
No, this product is an aftermarket (replacement) product that works perfectly with the original part. It replaces the original Mercury part with OE# 858934.
Related Products and Categories
- Anode Products
- Gearbox Oil Products
- Seal Products
- Impeller Products
- Mercury Products
- Mercury Spare Parts
- Gear Products
- Bearing Products
- Inboard Engine Products
Is this the Right Product for Your Boat?
Provide your engine brand, model, and transom serial number to the Clever Marin team, and we will confirm together that the SEI Late Series Shift Bushing model will work 100% compatibly with your boat.
Delivery Information
Your orders are dispatched within an average of 28 business days. Free shipping on orders of 5000 TL and above.
Return Policy
You can return the products you purchased unconditionally within 14 days, provided they are unused and in their original packaging. You can contact us through our Customer Service page for return processes.