WATER PUMP KIT 5000308 REC5000308

Function and technical context

The REC5000308 water pump repair kit brings together all the components necessary to restore the correct operation of the water cooling system on two-cylinder outboard engines. The water pump is the heart of the cooling circuit: its six-bladed impeller—a distinctive feature of this kit—guarantees sufficient flow to dissipate the heat generated by combustion, protecting the cylinder head, pistons and gaskets from the effects of excessive temperature. This kit is designed specifically for 40, 45, 50, 55 and 60 hp long tail loopcharged engines from the Johnson and Evinrude ranges, incorporating the large water pump that these configurations require. A deteriorated impeller or a gasket in poor condition drastically reduces the coolant flow, putting the mechanical integrity of the engine at risk with each outing to sea.

When to replace this part?

The most common symptoms of wear of the water pump in an outboard are the absence or reduction of the cooling water jet in the indicator nozzle, overheating of the engine with activation of the revolution limiter and the appearance of rubber fragments from the impeller in the water circuit. Professionals recommend replacing the impeller and pump sealing components every 300 hours of use or every two boating seasons at most, since the rubber hardens and cracks even in low-hour engines if they remain idle for a long time. Carrying out this replacement preventively, taking advantage of seasonal maintenance, avoids serious breakdowns at sea and considerably extends the useful life of the engine assembly.

Compatible Johnson/Evinrude Engines

Equivalent manufacturer part numbers