Water Pump Impeller SIERRA 118-3099

Compatible Engines

The SIERRA 118-3099 water pump impeller is a critical component of the cooling system, engineered for reliability and long service life. This part is specifically designed for 4-cylinder outboard engines with 9.9 and 15 HP, including models such as JOHNSON/EVINRUDE/SUZUKI DT9.9, 15 (1983-1997) and DF9.9, 15 (1996-Up). It is also compatible with DF20 (2013-19) engines. Due to variations in cooling system configurations across different model years, we strongly recommend verifying compatibility using the manufacturer's catalog number or OE number before purchasing. If you have any doubts about selecting the correct part, please contact our customer service team to ensure that 118-3099 is the right choice for your engine.

Installation and Maintenance

Regular replacement of the water pump impeller is essential for maintaining optimal engine operating temperatures. A worn or seized impeller can lead to engine overheating, resulting in costly repairs. Installation requires removing the pump housing and carefully extracting the old element. Before installing the new SIERRA impeller, ensure the pump chamber is clean and the seals are undamaged. The new impeller should slide in smoothly without excessive resistance. Remember that genuine replacement parts guarantee precise dimensional fit (42x20x12 mm) and material durability, ensuring stable coolant flow. Do not delay replacement at the first signs of reduced cooling performance.

• Original SIERRA manufacturer quality ensures durability
• Perfect dimensional fit for selected 9.9-15 HP models
• Prevents outboard engine overheating
• Easy installation in standard pump housing
• Effective protection against corrosion and wear