we recommend inspecting the impeller annually and replacing it every 1-2 years or 100-200 hours of operation
The best way to ensure fitment is to check your engine's model
86 lb) Fitting Type 5/16-inch (8 mm) Burst Pressure 100
Product Type Outboard Water Pump Impeller Kit Installation OEM Replacement Material CR Rubber (Impeller)
you may also visually see sediment or water collected inside
Water Pump Impeller Kit – Fits Kohler Marine Generators 4-8HP (Replaces Kohler 359978, Sherwood 8000K, Sierra 23-3314) 85-235HP we recommend inspecting the impellerProduct Details This Water Pump Impeller Kit is a direct replacement component for Kohler Marine Generators in the 48 HP range (including 4EF, 5E, 6EF, 7. 3E, and 8EFK series) that are factory equipped with Sherwood G8000, G8001, or G8002 series pumps. It's engineered to restore cooling system performance and prevent engine overheating. It serves as a direct interchange for several OEM and aftermarket part numbers, including Kohler 359978, Sherwood