8M0097857 Maintenance Kit for Mercury Quicksilver | JLM Marine

8M0097857 Maintenance Kit for Mercury Quicksilver | JLM Marine

This comprehensive maintenance kit is designed for Mercury Quicksilver Marine outboard motors rated 75–115 HP with 1.7L FourStroke engines. It provides all essential service components—water pump repair kit, thermostat, fuel filters, oil filter, and drain gaskets—in a single package to keep your engine running at peak performance.

Direct Replacement for OEM Number: 8M0097857. This kit streamlines routine maintenance by bundling critical wear items, reducing downtime and ensuring reliable operation season after season.

• Includes water pump rebuild components, thermostat assembly, fuel and oil filters, plus drain gaskets
• Designed for Mercury FourStroke 1.7L engines in the 75–115 HP range
• Covers serial numbers 1B366823 through 2B094995

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 maintenance kit includes the following components:

• 1 × Water Pump Repair Kit (47-8M0113799)
• 1 × Thermostat (8M0090819)
• 1 × Thermostat Seal
• 2 × Fuel Filter Assembly (35-879885Q)
• 1 × Oil Filter (35-877761K01)
• 1+3 × Drain Gaskets (828816 & 12-191833)

Installation Guide

1. Preparation: Ensure the engine is cool and disconnected from the fuel supply. Gather necessary tools including screwdrivers, wrenches, and a drain pan.
2. Oil Filter Replacement: Locate the oil filter and unscrew the old unit using a filter wrench. Install the new oil filter hand-tight after applying a thin layer of oil to the gasket.
3. Drain Old Oil: Remove the drain plug and allow old engine oil to drain completely into the pan. Replace the drain gasket with a new one from the kit.
4. Fuel Filter Installation: Disconnect fuel lines from the old filter assemblies and replace with the two new fuel filters. Ensure all connections are secure to prevent leaks.
5. Water Pump Disassembly: Remove the lower unit to access the water pump housing. Carefully disassemble the pump, noting the position of all components.
6. Water Pump Rebuild: Install the new impeller, gaskets, seals, and O-rings from the repair kit following the manufacturer's orientation marks. Lubricate rubber components with glycerin or soapy water.
7. Thermostat Replacement: Locate the thermostat housing on the cylinder head and remove the cover bolts. Replace the old thermostat and seal with new components from the kit.
8. Reassemble Lower Unit: Reinstall the water pump housing and lower unit, torquing all fasteners to specification. Check that the water pump drive shaft engages properly.
9. Refill Engine Oil: Add the recommended grade and quantity of marine engine oil through the fill port. Check the dipstick to confirm proper level.
10. Bleed Fuel System: Prime the fuel system by squeezing the primer bulb until firm. Check all fuel connections for leaks before starting the engine.
11. Test Run: Start the engine and verify water discharge from the telltale (pee hole). Allow the engine to reach operating temperature and check for leaks around all service points.
12. Final Inspection: Shut down the engine and perform a visual inspection of all replaced components. Tighten any connections as needed and dispose of old parts properly.

Troubleshooting & FAQ

Q: How do I confirm this maintenance kit fits my specific Mercury outboard?
A: Verify that your engine is a Mercury FourStroke 1.7L model rated between 75–115 HP with a serial number between 1B366823 and 2B094995. Cross-reference your engine's serial number plate with the compatibility table above, or consult the Mercury serial number guide linked in this listing.

Q: How often should I perform maintenance using this kit?
A: Mercury recommends annual maintenance or every 100 hours of operation, whichever comes first. Water pump impellers should be inspected yearly, and fuel/oil filters replaced at each service interval to ensure optimal performance and prevent costly repairs.

Q: What are the signs that my water pump or thermostat needs replacement?
A: Common symptoms include weak or no water discharge from the telltale, engine overheating, steam from the engine cover, or the temperature alarm sounding. If you notice any of these signs, inspect the water pump impeller and thermostat immediately.

Q: Can I use this aftermarket kit instead of the Mercury OEM 8M0097857?
A: Yes, this kit is manufactured to OEM specifications and includes all the components found in the original Mercury kit. It provides the same fitment and performance at a competitive price point.

Q: Do I need special tools to install the water pump repair kit?
A: Basic hand tools are sufficient—socket set, screwdrivers, and a torque wrench. A lower unit removal may require a service manual for torque specs and proper reassembly sequence for your specific model.

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.