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Mercury 35-80365M Fuel Filter for 9.9–15 HP Outboard Engine (Mercury/Yamaha Inline Filter)
The Quicksilver 35-80365M is a genuine replacement fuel filter designed to fit certain small Mercury as well as Yamaha outboard engines. Also known by Yamaha part number 646-24251-02-00, this filter was widely used on Mercury’s 9.9 HP and 15 HP four-stroke motors in the late 1990s and the equivalent Yamaha-built engines. In fact, during that era Mercury’s 9.9/15HP four-strokes were jointly developed with Yamaha, so this filter is interchangeable between the two brands.
Compatibility: It covers Mercury/Mariner 9.9 HP 4-stroke outboards (around model years 1995–1998) and all 15 HP 4-strokes from 1998 onward. It also fits a range of smaller Yamaha engines – for example, the Yamaha F4 (4 HP 4-stroke 1999–02), Yamaha 6 HP two-stroke (late 1980s through 1990s), 8 HP outboards up to 2002, and many Yamaha 9.9 HP models (both two-stroke and early four-stroke variants). This broad coverage makes the filter a convenient solution for owners of older outboards who need the correct replacement filter.
The filter’s design is a compact in-line unit with 5/16″ (approx. 8 mm) hose connections, making it easy to swap in. Its clear plastic body lets you visually monitor fuel condition – you can spot any trapped debris or water at a glance. Advantages: As an OEM Quicksilver/Mercury part, it delivers the exact filtration performance and fuel flow that the manufacturer intended. The filter effectively captures fine contaminants and protects the sensitive components of your fuel system from wear or clogging. Replacing it on a regular schedule (Mercury and Yamaha generally recommend annual replacement or every 50–100 hours) will keep your engine running smoothly.
By investing in this cross-compatible filter, you’re preventing potential issues caused by dirty fuel. Whether you own an older Mercury 9.9/15 HP or the corresponding Yamaha outboard, the Quicksilver 80365M inline filter will ensure only clean fuel reaches your engine, helping you avoid downtime and enjoy worry-free boating.
