Volvo penta 5.0 glb overheat

Overheats at high rpm but thermostat opens at low rpms basically overheats once is on plane for a little while

jamesp2004 said:
Overheats at high rpm but thermostat opens at low rpms basically overheats once is on plane for a little while

Anyone have any idea some ways to trouble shoot just replaced thermostat thermostat housing impeller and new raw water pump for engine

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