Jespchee,
You’re saying there’s something wrong w the prop because the coolant temp went up w the engine working hard?
All the prop can do is increase the load. If an engine is in good shape and especially the cooling system the coolant temp should match the thermostat rating under any load.
But I’ve been saying for many years engines should at least be able to achive their rated rpm at WOT.
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Eric
North Western Washington State USA
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