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Seems to be - good airflow as it exhausts from the radiator core. Bolts holding it in place are secure and fan is solid on the shaft and the blades are not broken or damaged in any way. I suspect there is somethign fouling the block restricting water flow. I plan to test the core tonight with a...

Fins are all clear - i use an airhose to blow all of it out when mowing is complete. One more crack with the descale fluid in the cooling system.

I have used jug of engine cooling system flush, run it until it wsa hot then flushed and re-filled with clean fluid. Is there something better on the market than standard auto parts store products? I am open to ideas. Thanks for your suggestions too.

I have a Deere mower with a Kawasaki FD590 liquid cooled engine and it keepss overheating. I have checked fluid levels, changed the thermostat, flushed the cooling system, insured the core is not clogged with debris, the fan is blowing properly, and even bought a new impeller for the water pump...