8M0097855 Annual Service Kit for Mercury 75HP 80HP 90HP 100HP 115HP EFI 2.1L | JLM Marine

Annual Service Kit for Mercury 75HP 80HP 90HP 100HP 115HP EFI 2.1L

This comprehensive annual service kit is engineered for Mercury 75HP, 80HP, 90HP, 100HP, and 115HP EFI 2.1L outboard engines (serial number 2B094996 and above). It includes all essential maintenance components required for a complete yearly service, ensuring optimal engine performance and longevity.

Direct replacement for Mercury OEM part number 8M0097855, this kit provides a cost-effective solution for routine maintenance without compromising on quality.

• Complete service kit with 20+ components including impeller, seals, gaskets, filters, and thermostat
• Designed specifically for Mercury EFI 2.1L engines
• Includes fuel filter, oil filter, and gear oil pump for comprehensive maintenance

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

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.

Technical Specifications

Package Contents

This comprehensive annual service kit includes the following components:

• 47-43026Q02 - Impeller × 1
• 26-8M2014338 - Seal × 1
• 2210 - Seal × 1
• 8172761 - Plate × 1
• 25-21836 - O-ring × 2
• 27-8M0142616 - Gasket × 1
• 27-8172771 - Gasket × 1
• 28-8M0032833 - Key × 1
• 26-45577 - Seal × 1
• 25-90196 - O-ring × 1
• 26-830749 - Gasket × 3
• 8M0090819 - Thermostat × 1
• 35-879885Q - Fuel Filter × 1
• 35-8M0162829 - Oil Filter × 1
• 8M0036238 - Coupling × 1
• 8M0057748 - Base × 1
• 8M007119 - Drain Gasket × 1
• 830749 - Drain Gasket × 3
• 24OP149 - Gear Oil Pump × 1

Installation Guide

1. Preparation: Ensure the engine is off and cool. Gather all necessary tools including screwdrivers, wrenches, and a drain pan.
2. Water Pump Service: Remove the lower unit and access the water pump housing. Replace the impeller (47-43026Q02), plate (8172761), and all seals and gaskets included in the kit.
3. Thermostat Replacement: Locate the thermostat housing on the engine block. Remove the old thermostat and install the new one (8M0090819) with the provided gasket.
4. Fuel Filter: Locate the fuel filter assembly and replace the fuel filter element (35-879885Q). Ensure all connections are secure to prevent fuel leaks.
5. Oil Filter: Remove the old oil filter and install the new oil filter (35-8M0162829). Apply a thin coat of clean oil to the gasket before installation.
6. Drain and Refill Gear Oil: Use the gear oil pump (24OP149) to drain old gear oil from the lower unit. Install new drain gaskets and refill with manufacturer-recommended gear oil.
7. O-rings and Seals: Replace all O-rings and seals as indicated in the service manual. Pay special attention to proper seating to prevent leaks.
8. Reassembly: Reinstall the lower unit, ensuring all bolts are torqued to specification. Double-check all connections and fittings.
9. System Check: Start the engine and check for leaks around all replaced components. Verify proper water pump operation by confirming water flow from the telltale.
10. Test Run: Perform a brief test run at idle and higher RPMs. Monitor engine temperature and performance.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my specific Mercury engine?
A: Verify that your engine is a Mercury 75HP, 80HP, 90HP, 100HP, or 115HP EFI 2.1L model with serial number 2B094996 or above. You can locate your serial number on the mounting bracket and cross-reference it using the Mercury Serial Number Guide linked above.

Q: How often should I perform this annual service?
A: Mercury recommends performing this complete service annually or every 100 hours of operation, whichever comes first. More frequent service may be required in saltwater or harsh operating conditions.

Q: What are the signs that my engine needs this service kit?
A: Common indicators include overheating, reduced water flow from the telltale, difficulty starting, reduced performance, or visible gear oil contamination. Regular annual maintenance prevents these issues.

Q: Can I use individual parts from this kit separately?
A: Yes, all components can be installed individually as needed. However, performing the complete annual service ensures all wear items are replaced together for optimal engine health.

Q: What's the difference between this kit and the OEM Mercury kit?
A: This aftermarket kit is manufactured to OEM specifications using comparable materials and includes all the same components as the OEM 8M0097855 kit. It provides a cost-effective alternative without sacrificing quality or performance.

Q: Is this an OEM part or 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.