2004 Bigfoot 40hp overheating

dogdaysllc

Cadet
Joined
Aug 31, 2018
Messages
9
2004 4ELPTEFI
Serial # OT805116

Plenty of water coming from telltale however it never gets hot. Overheat alarm sounds as soon as load is put on the motor. New impeller and thermostat. I have run it without a thermostat with the same results (discharge water not hot).
I tried flushing with saltaway both through the muffs (running) and through the flush port (not running).
I poured Saltaway directly into the thermostat housing.

Would this indicate an internal cooling system blockage?

Thanks in advance for any and all suggestions.
 
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