Boot Protector 822158 – Fits Mercury 25-50HP Outboard (Replaces Mercury 822158)
This boot protector is designed for a precise fit on Mercury 25-50HP 4-Stroke (1997–2025) and 30-50HP 2-Stroke (1995–2025) outboard engines. It serves as a direct replacement for the original shift boot, protecting the shift rod and internal components from water, dust, and debris.
It directly replaces OEM and aftermarket part numbers: Mercury 822158, SEI Marine 98-263-23, GLM 89083, and UANOFCN 822158.
-
Installation Method: Simple press-fit installation with no special tools required.
-
Material: Constructed from a durable, marine-grade rubber compound resistant to saltwater, UV, and oil.
-
Package Includes: 1 x Shift Boot (822158).
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand |
Part Number |
| Mercury |
822158 |
| SEI Marine |
98-263-23 |
| GLM |
89083 |
| UANOFCN |
822158 |
Compatible Engine Models
Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.
| Brand |
Model |
Rated HP |
Stroke |
Years |
OEM Part No. |
Notes |
| Mercury |
25 HP |
25 |
4-Stroke |
1997-2025 |
822158 |
All serial ranges |
| Mercury |
30 HP (2 CYL) |
30 |
2-Stroke |
1995-2025 |
822158 |
Standard and EFI |
| Mercury |
30 HP (3 CYL) |
30 |
4-Stroke |
1997-2025 |
822158 |
Carb, EFI, and JET |
| Mercury |
40 HP (2 CYL) |
40 |
2-Stroke |
1995-2025 |
822158 |
Standard configuration |
| Mercury |
40 HP (3 CYL) |
40 |
4-Stroke |
1997-2025 |
822158 |
Carb and EFI versions |
| Mercury |
40 HP Italy |
40 |
4-Stroke |
2000-2015 |
822158 |
European market |
| Mercury |
45 HP Bodensee |
45 |
4-Stroke |
2000-2015 |
822158 |
Italy manufactured |
| Mercury |
50 HP (3 CYL) |
50 |
2-Stroke |
1995-2025 |
822158 |
Standard configuration |
| Mercury |
50 HP |
50 |
4-Stroke |
1997-2025 |
822158 |
Standard and Bigfoot |
| Mercury |
50 HP Bigfoot |
50 |
4-Stroke |
1997-2025 |
822158 |
Extended lower unit |
Technical Specifications
| Specification |
Value |
| Product Type |
Boot Protector / Shift Boot |
| Installation |
Direct OEM replacement, press-fit |
| Fuel Type |
Compatible with all fuel types |
| Connection |
Press-fit installation |
| Housing Material |
Marine-grade rubber compound |
| Housing Color |
Black |
| Dimensions |
63.5 mm L x 44.45 mm W x 31.75 mm H (2.50" x 1.75" x 1.25") |
| Weight |
13.6 g (0.03 lbs) |
| Fitting Type |
Shift rod cap boot |
| Working Pressure |
Standard marine operating pressure |
| Burst Pressure |
Exceeds OEM specifications |
| Operating Temperature |
-40°C to 93°C (-40°F to 200°F) |
| Warranty |
1 Year manufacturer warranty |
| Other Technical Attributes |
Saltwater resistant, UV stable, oil resistant |
Package Contents
Installation Guide
-
Safety First: Ensure the outboard engine is turned off and the shifter is in the neutral position. Disconnect the battery for added safety.
-
Access the Shift Rod: Remove the engine cowl to gain access to the shift mechanism and the old boot protector.
-
Remove the Old Boot: Carefully pry or pull the old, deteriorated boot off the shift rod cap. Clean any residue or debris from the mounting area.
-
Install the New Boot: Align the new boot protector over the shift rod cap.
-
Press to Secure: Apply firm and even pressure to press the boot down until it snaps or seats securely into place, creating a tight seal.
-
Final Check: Test the shift lever to ensure it moves smoothly through all gears without any binding or obstruction from the new boot. Reinstall the engine cowl.
Troubleshooting & FAQ
Q: How do I confirm this fits my engine?
A: This boot protector fits a wide range of Mercury outboards from 25-50HP. Please review the "Compatible Engine Models" table on this page and cross-reference your engine's model, year, and OEM part number. This part is a direct replacement for Mercury part number 822158.
Q: What are the signs that my old shift boot needs replacing?
A: Common signs of a failed boot include visible cracks, brittleness, tearing, or discoloration in the rubber. A damaged boot can allow water and debris to enter the lower cowl, potentially harming the shift mechanism and other components.
Q: Is installation difficult?
A: Installation is generally straightforward. As a press-fit component, it does not typically require special tools. Simply remove the old boot and press the new one firmly into place over the shift rod cap until it is fully seated.
Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
-
Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
-
Fast Global Shipping: Free delivery worldwide in 5–15 days.
-
Direct from Manufacturer: Competitive pricing without compromising quality.