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Engine Temp Climbs to 200F after Plane to Idle Transisition

K

Keep'r Wet

New member
Engines run within temp under all RPM and Load Ranges, never going above 175F. But when I slow the boat from plane at say 3500 RPM to Idle, Temps jump up around 200F to 205F and set off 200F Temp Alarm. I'm assuming this is because the belt driven water pumps slow down when the engine slows and the high heat generated from the Higher RPM cannot be expelled quick enough. But is there another issue? This shouldn't happen. What Can I do to fix???

Thanks,

-Jon
 
Heat Exhangers were recently cleaned/boiled out and checking inlet an outlet temps with a temp probe they show to be working perfectly as far as temp differential they are rated for.
 
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