While motoring for about 30 mins with the temperature stable at 140 deg, suddenly the temperature gauge shot up to 200 degrees and then bounced quickly and erratically between 200 and 220 (pegged). I shut down the engine immediately and sailed for about 10 mins, then restated the engine. It ran perfectly at low rpm for another 30 mins until I got to the dock. Water was flowing out of the exhaust (raw water cooled engine).
I did not want to rev up the engine until I checked it out. I checked the connection on the temp sender and inspected the impeller, all OK. Maybe some junk covering the intake port? Does not feel like normal overheating since this was not gradual but very sudden and sharp movements of the temp gauge. Any thoughts?
I did not want to rev up the engine until I checked it out. I checked the connection on the temp sender and inspected the impeller, all OK. Maybe some junk covering the intake port? Does not feel like normal overheating since this was not gradual but very sudden and sharp movements of the temp gauge. Any thoughts?
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