JLM Marine 42909A4 Fuel Pump Kit for Mercury Mariner 3-Cyl 70-90 HP & 4-Cyl 115 HP Outboards

Precision replacement for Mercury Mariner outboards

When it’s time to service your Mercury Mariner, the JLM MARINE 42909A4 Fuel Pump Kit offers a precise, OEM-focused option. This kit gathers all the essential components you need to refurbish a fuel pump, from seals to gaskets, with an eye toward straightforward installation and lasting performance. Expect a thoughtful, hands-on maintenance experience rather than a quick fix.

What’s covered by this kit

The kit is designed for Mercury models and replaces multiple references, including 42909A1, 42909A2, 42909A3, and 42909A4, plus Sierra 18-7818-1, Mallory 9-37754, and GLM 40280. It fits:

• Mercury 3-cylinder engines: 70 HP, 75 HP, 80 HP, 90 HP
• Mercury 4-cylinder engine: 115 HP

What’s inside and how it helps

• All essential seals, gaskets, and diaphragm components included for refurbishing the fuel pump
• Parts designed to meet or exceed OEM standards for reliable, long-lasting performance
• Replacement coverage across common Mercury aftermarket references, reducing the need to source individual parts

Real-world use and benefits

On a weekend fishing trip or a day of coastal cruising, this kit can help you restore consistent fuel delivery and smooth engine operation. While it doesn’t guarantee outcomes, the kit is crafted to support accurate rebuilds and durable results under typical operating conditions.

Installation and maintenance notes

• Follow standard safety practices and consult your engine manual during maintenance
• Inspect related fuel system components for signs of wear to maximize benefits