Boot Protector – Fits Mercury 25-50HP Outboard (Replaces Mercury 822158)
Boot Protector – Fits Mercury 25-50HP Outboard (Replaces Mercury 822158) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
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Boot Protector – Fits Mercury 25-50HP Outboard (Replaces Mercury 82...
Boot Protector – Fits Mercury 25-50HP Outboard (Replaces Mercury 822158) is backordered and will ship as soon as it is back in stock.
Product Details
This Boot Protector 822158 serves as a direct-fit replacement shift rod boot for a wide range of Mercury outboard engines. It is designed for Mercury 25-50HP 4-Stroke models from 1997–2025 and Mercury 30-50HP 2-Stroke models from 1995–2025, ensuring a precise seal to protect internal components.
It provides a direct interchange for Mercury 822158, SEI Marine 98-263-23, GLM 89083, and UANOFCN 822158.
- Installs via a simple press-fit connection, requiring no special tools.
- Engineered with a UV and saltwater-resistant rubber compound suitable for harsh marine environments.
- The package includes one shift boot for a complete replacement.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 822158 |
| SEI Marine | 98-263-23 |
| GLM | 89083 |
| UANOFCN | 822158 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This part is designed exclusively for the Mercury models listed. Please verify your engine's specifications match the details provided.
| 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 Specs
- 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
What’s in the Box
- 1 x Shift Boot (822158)
Installation Notes
Installation is a direct replacement for the original boot. Ensure the shift rod is clean and free of debris. The new boot is installed via a press-fit connection, seating it firmly to create a proper seal. No special tools are required, but ensure it is fully seated to prevent water intrusion.
Troubleshooting & FAQ
How do I know if this boot protector fits my engine?
This part fits specific Mercury models from 25HP to 50HP manufactured between 1995 and 2025. Please check the "Engine & Model Compatibility" table and verify your engine model and year against the list to ensure a correct fit.
What are the signs my old shift boot needs replacing?
Look for visible cracks, brittleness, or tearing in the rubber. A loose or improper fit can also allow water and debris into the lower casing, indicating a need for replacement.
How often should this boot be inspected or replaced?
It is good practice to inspect the shift boot during regular lower unit maintenance or at least once per season. Replace it at the first sign of wear, degradation, or damage to protect internal components.
Is this part different from the original Mercury part?
While this is an aftermarket part, it is designed to meet or exceed OEM specifications for fit, material, and function, offering a reliable alternative to the original 822158 boot.
My engine isn't listed, but the part looks similar. Can I use it?
We do not recommend using this part if your engine model is not explicitly listed in the compatibility chart. Small differences in design can affect the seal and performance, potentially leading to damage. Always use the specified part for your engine.
What is the main function of this boot?
This boot creates a seal around the shift rod as it enters the lower unit (gearcase), preventing water, salt, and debris from contaminating the gear lube and internal mechanisms.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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