811287 Accelerator Pump Repair Kit for Mercury 80HP 100HP 115HP 125HP | JLM Marine

Accelerator Pump Repair Kit for Mercury 80HP 100HP 115HP 125HP

This accelerator pump repair kit is engineered for Mercury 4-cylinder outboard motors ranging from 80HP to 125HP, covering model years 1988 through 2004. It ensures reliable fuel delivery and smooth throttle response across a wide range of Mercury JET and standard 4-cylinder configurations.

This kit directly replaces OEM part numbers 811287, 8M0138942, 1395-811287, and 14687A4, providing a cost-effective solution for maintaining your carburetor's accelerator pump system.

• Comprehensive repair kit for accelerator pump rebuilds
• Fits Mercury 80HP JET, 100HP, 115HP, and 125HP 4-cylinder engines
• Covers serial number ranges 9793577 through 0P016999 and 0D283222 through 0G760299

Part Number Cross-Reference

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

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 repair kit includes all necessary components to rebuild your accelerator pump:

• Complete accelerator pump repair kit with seals, gaskets, and hardware

Installation Guide

1. Disconnect the fuel line and ensure the engine is cool. Remove the carburetor from the engine following your service manual.
2. Disassemble the accelerator pump section by removing retaining screws or clips. Take note of component orientation for reassembly.
3. Remove old seals, gaskets, and O-rings from the pump housing and plunger. Clean all surfaces thoroughly with carburetor cleaner.
4. Inspect the pump housing and plunger for wear, cracks, or damage. Replace components if necessary.
5. Install new seals and O-rings from the repair kit onto the plunger and into the housing grooves. Lightly lubricate with clean engine oil.
6. Reassemble the accelerator pump assembly in reverse order, ensuring all parts are properly seated. Tighten fasteners to manufacturer specifications.
7. Reinstall the carburetor onto the engine and reconnect all fuel lines and linkages. Double-check all connections for security.
8. Prime the fuel system and start the engine. Check for fuel leaks around the pump area and verify smooth throttle response.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my Mercury engine?
A: Verify your engine's horsepower (80HP, 100HP, 115HP, or 125HP), that it is a 4-cylinder model, and that the serial number falls within the ranges 9793577 through 0P016999 or 0D283222 through 0G760299. You can also cross-reference OEM part numbers 811287, 8M0138942, 1395-811287, or 14687A4.

Q: What are the signs that my accelerator pump needs rebuilding?
A: Common symptoms include hesitation or stumbling during acceleration, poor throttle response, fuel leaking from the carburetor, or difficulty starting. If you notice any of these issues, inspect and rebuild the accelerator pump.

Q: How often should I replace or rebuild the accelerator pump?
A: Rebuild intervals depend on usage and fuel quality, but typically every 2–3 years or whenever you notice performance issues. Regular carburetor maintenance and using fresh fuel will extend pump life.

Q: Can I install this kit without removing the entire carburetor?
A: While some experienced technicians may access the accelerator pump with the carburetor in place, we recommend full removal for thorough cleaning and inspection. This ensures all seals seat properly and no debris remains.

Q: Is this an OEM or aftermarket part?
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.