Out of stock
SKU: CW42632
UPC: 7330717012281
MPN: 09-702B-1
The Johnson Pump 09-702B-1 impeller kit is a replacement cooling pump impeller built from MC97 rubber for marine engine raw-water systems. It's the part boat owners and marine techs reach for when an engine starts running hot or the old impeller shows cracked, swollen, or missing blades. Molded to fit the F5 pump body, this impeller pushes raw water through the cooling circuit to keep operating temperatures in check. We stock it alongside our other marine impellers so you can match the right wear part to your engine without guesswork.
MC97 is a rubber compound engineered to hold up in marine cooling service, rated by the manufacturer for 2,000-plus hours. It resists the swelling and fatigue cracking that take down lesser impellers, and it stabilizes pumping pressure over time so flow stays consistent as the part ages. The 09-702B-1 measures roughly 65.4 mm (2.57 in) outside diameter and 41.4 mm (1.63 in) wide, with a splined bore that drives off the pump shaft. It cross-references to Jabsco 18948-0001 and Sherwood 10615K, and fits raw-water pumps across a wide range of engine brands including Volvo Penta, Crusader, Onan, Perkins, Westerbeke, and Chris Craft. That broad compatibility makes it a common annual-service item for many inboard and sterndrive setups.
Impellers are wear items, and most builders recommend swapping them once a season or any time the engine has run dry. If you're pulling the pump apart, this is the time to inspect the housing and end cover too. We carry related engine cooling pumps and the gaskets and end covers that go with a full service, so you can knock out the whole job in one shot. Keep a spare 09-702B-1 aboard with your tools and spares kit, because a failed impeller on the water is the kind of problem that strands a boat. Browse the rest of our marine plumbing and ventilation parts to round out your kit.
It fits F5 raw-water pumps used across a broad range of marine engine brands, including Volvo Penta, Crusader, Onan, Perkins, Westerbeke, and Chris Craft. It also cross-references to Jabsco 18948-0001 and Sherwood 10615K. Confirm the pump model and impeller dimensions against your engine before ordering.
Most builders recommend replacing a raw-water impeller annually or every season. The MC97 compound is rated for 2,000-plus hours of service, but you should swap it sooner if the engine has run dry, overheated, or if you find cracked, swollen, or missing blades during inspection.
MC97 is a rubber compound formulated for marine cooling-system service. It resists swelling and fatigue cracking, stabilizes pumping pressure as the part ages, and is engineered to deliver longer service life than standard impeller materials in this class.
Per retailer specifications, it measures about 65.4 mm (2.57 in) outside diameter and 41.4 mm (1.63 in) wide, with a splined bore that engages the pump shaft. Measure your old impeller before ordering, since some published dimensions vary between sources.
Yes. An impeller can fail without warning, and a failed one can leave a boat without engine cooling on the water. Keeping a spare 09-702B-1 with your onboard tools and service parts lets you make the swap quickly if the original lets go.
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