Impeller for Yamaha/Mariner 9.9-15 HP (Older Models) – Reliable 6-Blade Water Pump Impeller

The 52.400.02 impeller is designed for earlier generations of Yamaha and Mariner 9.9-15 HP outboard engines. It replaces the original impeller (OEM part no. 682-44352-01 or latest revision 682-44352-03) and restores full cooling efficiency to your engine. This part is compatible with classic 9.9 HP and 15 HP two-stroke models, as well as certain Yamaha 8 HP and 9.9 HP four-stroke engines from the early series. The robust marine-grade rubber construction ensures the water pump operates reliably in freshwater and saltwater conditions without warping or cracking.
By installing this impeller, your older engine will maintain optimal running temperature even under heavy use. The impeller is a precise fit, requiring no modifications—simply swap out the old part. Replacing a worn impeller with a new one provides proper cylinder cooling and safeguards the engine from overheating, especially on hot summer days.
This impeller model is a critical maintenance component for the legendary Yamaha/Mariner 15 HP engines of the 1980s and 1990s. Regular inspection and replacement of the impeller (for example, at the start of each season) will save you from costly repairs and unwanted breakdowns on the water. Trust this quality replacement to continue protecting the life of your reliable outboard motor.

• Application: Suitable for classic small-to-medium boats equipped with earlier-model Yamaha/Mariner 9.9-15 HP engines. Whether it's a vintage fishing skiff or a utility dinghy, this impeller provides the necessary cooling performance.
• Recommendation: Recommended for vessels around 3–5 meters long using older model Yamaha/Mariner 9.9-15 HP outboards. Changing this impeller regularly (every 12 months) ensures that even an older engine runs smoothly and stays cool under all conditions.