Last year, I purchased a very well maintained Columbia 31 and Atomic4. I love the boat and the engine!! However, this spring I noticed that temps quickly rose to 190 when running at 1200 RPM.
Suspecting the impellers, I changed both raw and fresh water impellers. The fresh water blades were very bent, and the raw water blades on the Sherwood pump were cracked and broken. Unfortunately, I did not do an inventory of parts at the time. However, later I checked the 90 degree angle fitting and the hoses, and there were no parts.
Last week, I ran the engine at 1500 RPM and the temperature was 185 degrees, and at 2000 RPM, it was about 195. These temps were observed in the Rappahonock river where the water temp was about 80-85 degrees. Also, the previous owner informed me the thermostat is "set" at 180 degrees.
I read in earlier posts that 190+ temps are a red flag. My question is: Should I expect the higher temps if the raw water is already warm - or is the raw water temp a non-factor and the problem is something else?
I'm planning bringing the boat up to Mystic Ct, and before I go, would like to know if I have a problem and what steps I should take to resolve the it.
Thanks in advance for the help,
Bill Nieuwkerk
Suspecting the impellers, I changed both raw and fresh water impellers. The fresh water blades were very bent, and the raw water blades on the Sherwood pump were cracked and broken. Unfortunately, I did not do an inventory of parts at the time. However, later I checked the 90 degree angle fitting and the hoses, and there were no parts.
Last week, I ran the engine at 1500 RPM and the temperature was 185 degrees, and at 2000 RPM, it was about 195. These temps were observed in the Rappahonock river where the water temp was about 80-85 degrees. Also, the previous owner informed me the thermostat is "set" at 180 degrees.
I read in earlier posts that 190+ temps are a red flag. My question is: Should I expect the higher temps if the raw water is already warm - or is the raw water temp a non-factor and the problem is something else?
I'm planning bringing the boat up to Mystic Ct, and before I go, would like to know if I have a problem and what steps I should take to resolve the it.
Thanks in advance for the help,
Bill Nieuwkerk
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