Impeller Kits

The humble rubber impeller is what keeps your engine cool - and it's a service item, not a fit-and-forget part. This collection covers impeller kits for the popular marine raw-water pumps, including Jabsco and Johnson types, with the gaskets and O-rings needed to do the job properly in one go.

Impellers fail from age as much as use: vanes take a set when the pump sits unused, crack with heat and perish over winters. Replace annually or per your engine schedule, and always investigate a failed impeller - the missing vane fragments travel downstream into the heat exchanger and must be found. Fitting is straightforward with a smear of glycerine or washing-up liquid and a twist in the pump's rotation direction. Identify your kit by the pump or engine model number stamped on the pump body.

Frequently asked questions

How often should I change my engine's impeller?

Annually or per the engine maker's schedule - and always after any dry-running incident. An impeller costs pounds; an overheated engine costs a season.

How do I find the right impeller kit for my engine?

Use the pump model number stamped on the raw-water pump body, or your engine make and model - each maps to a specific impeller size and kit. A photo of the pump helps us identify uncertain cases.

My impeller lost vanes - where did they go?

Downstream, usually into the heat exchanger inlet - find and remove every fragment, or the cooling system stays partially blocked and the engine runs hot despite the new impeller.

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