Mercury Outboard Maintenance Kit – Fits Mercury 100 Hour Service Intervals (Multiple Models)
Mercury Outboard Maintenance Kit – Fits Mercury 100 Hour Service Intervals (Multiple Models) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This Mercury Outboard Maintenance Kit contains all the necessary components for performing routine 100-hour or 300-hour service on a wide range of Mercury outboard engines. These kits simplify maintenance by packaging genuine-specification parts together, ensuring proper engine care and longevity. Regular service helps maintain optimal performance and reliability on the water.
Each kit serves as a direct replacement for the specific OEM part number listed in the compatibility tables. Please verify your engine model and serial number to select the correct kit.
- Installation: Can be installed by a DIY enthusiast or a professional marine mechanic.
- Core Components: Includes essential service items like an oil filter, fuel filter, and drain plug seal.
- Fitment Type: Designed for an OEM-equivalent fit and function.
Engine & Model Compatibility
Confirm your engine model and serial number in the tables below. It is critical to select the correct kit for your specific engine to ensure proper fit and function.
Mercury 100 Hour Maintenance Kits
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury | 40/50/60 HP FourStroke EFI | 40-60 | 4-Stroke | 8M0090558 | Command Thrust models use different kit |
| Mercury | 40-60 HP FourStroke EFI | 40-60 | 4-Stroke | 8M0232733 | Newer part number |
| Mercury | 75-115 HP (2.1L) FourStroke | 75-115 | 4-Stroke | 8M0097854 | For S/N 2B094996 & Up |
| Mercury | 75-115 HP (1.7L) FourStroke | 75-115 | 4-Stroke | 8M0097856 | For S/N 1B366823 - 2B094995 |
| Mercury | 150 HP FourStroke EFI | 150 | 4-Stroke | 8M0094232 | |
| Mercury | V6 3.4L and V8 4.6L FourStroke | 175-300 | 4-Stroke | 8M0149929 | |
| Mercury | 15-20 HP FourStroke EFI | 15-20 | 4-Stroke | 8M0151469 | For S/N 0R833820 & above |
| Mercury | L6 Verado | 200-300 | 4-Stroke | 8M0097858 | For S/N 2B144122 & below |
| Mercury | L6 Verado | 200-300 | 4-Stroke | 8M0120657 | For S/N 2B144123 & above |
Mercury 300 Hour Maintenance Kits
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury | 40-60 HP FourStroke | 40-60 | 4-Stroke | 8M0113483 | For S/N 0R106999 and above |
| Mercury | 40-60 HP FourStroke Command Thrust | 40-60 | 4-Stroke | 8M0090559 | For S/N 1C000001 & up |
| Mercury | 75-115 HP (2.1 L) FourStroke | 75-115 | 4-Stroke | 8M0097855 | For S/N 2B094996 and up |
| Mercury | 75-115 HP (1.7 L) FourStroke | 75-115 | 4-Stroke | 8M0097857 | For S/N 1B366823-2B094995 |
| Mercury | 150 HP FourStroke | 150 | 4-Stroke | 8M0094233 | |
| Mercury | 15-20 HP FourStroke EFI | 15-20 | 4-Stroke | 8M0151470 | For S/N 0R833820 and above |
| Mercury | 25-30 HP FourStroke | 25-30 | 4-Stroke | 8M0120839 | For S/N 0R106999 and above |
| Mercury | L6 Verado | 200-300 | 4-Stroke | 8M0097859 | S/N 2B144122 & Below (with Anodes) |
| Mercury | L6 Verado | 200-300 | 4-Stroke | 8M0149427 | S/N 2B144122 & Below (without Anodes) |
Technical Specs
- Product Type
- Outboard Engine Maintenance Kit
- Installation
- DIY or Professional Service
- Fuel Type
- Gasoline
- Connection
- Model-specific
- Box Dimensions
- 11.0" L × 11.0" W × 7.5" H
- Fitting Type
- OEM fit
- Thread Size
- Model-specific
- Warranty
- 1-Year Manufacturer Warranty
What’s in the Box
Contents vary by kit model. A typical service kit includes the following core components:
- 1 x Oil Filter
- 1 x Fuel Filter
- 1 x Oil Drain Seal
- Additional components for specific engine applications (e.g., spark plugs, thermostats, anodes, etc., are often in 300-hour kits).
Installation Notes
Follow your outboard manufacturer’s service manual for detailed instructions. The general steps for an oil and filter change are as follows:
- Position the engine in a tilted or vertical position as specified by the manufacturer for oil service.
- Place a suitable drain pan under the engine's drain plug.
- Remove the drain plug and allow all the old oil to drain completely.
- Replace the old oil drain seal with the new one provided and reinstall the drain plug, torquing it to specification.
- Remove the old oil filter. A filter wrench may be required.
- Lightly lubricate the gasket of the new oil filter with fresh oil and install it, hand-tightening it per the instructions.
- Locate and replace the fuel filter(s) as required by your engine model.
- Fill the engine with the correct amount and type of new engine oil. Do not overfill.
- Verify the oil level using the dipstick.
- Start the engine and let it run for a minute to circulate the oil, checking for any leaks around the filter or drain plug.
- Stop the engine, wait a few minutes, and re-check the oil level, topping off if necessary.
- Dispose of all used oil, filters, and seals according to local environmental regulations.
Troubleshooting & FAQ
How do I know which kit is right for my Mercury outboard?
Check your engine's model, horsepower, and serial number. Compare this information against the compatibility tables on this page to find the correct OEM part number for your service kit.
What's the difference between a 100-hour and 300-hour kit?
The 100-hour kit convers basic annual service items like oil and fuel filters. The 300-hour kit includes these items plus more comprehensive components for deeper maintenance, such as spark plugs, thermostats, or water pump impellers.
Do these kits include engine oil?
Genuine Mercury maintenance kits are designed to include the proper amount of engine oil for your specific outboard. This aftermarket kit is based on those same specifications and is intended to provide all parts needed for a standard service interval.
My engine's serial number is not listed. Can I still use one of these kits?
We recommend only using a kit if your specific serial number range is listed. Using the wrong kit can result in improper fitment or engine damage. If in doubt, contact us with your engine details before purchasing.
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
