Operating tempurture on 8.1 engines on a 2002 340 Sundancer

[Bob Pond]

Have about a 5 degree difference in temperature on my engines at 1000 - 1200 RPM's. Starboat at about 165, the port at a 170. Are these temperatures OK?

Thanks,
Bob

 

[archangel73]

Yes, those are normal temps. 160 is the normal range.

 

[ziekman@cox.net]

What are they at 3200? Any idea if the 170 is consistent with prior readings? Mine run about 155 consistently.

 

[Georgia SeaDawg]

Mine stay between 158 and 161.

 

[Tomco]

I only have a 1 or 2 degree difference between the engines. At about 1200 RPM mine sit at 158/159 - the water here is a tad cooler than down south so that may help a bit. I can't remember for sure but I thought around 160 was normal .. .the 170 you have seems high.

 

[MasterFab]

Remember, the analog gauges on the older boats are not dead accurate, and a spread of 5 degrees could be something as simple as the difference between gauges and sending units. If it has always been that way, and hasn't changed, then all is well. Trending is the thing to be mindful of. If they were always the same, and one engine just jumped up 5 degrees, then you have some investigating to do.....

Dale

 

[rondds]

Get an IR temp gun and shoot readings at the thermostat housing for more accuracy.

 

[Jaay757]

158, 158 at idle,
161, 163 at 3400

 

[Beer Hunter]

I have the same engines - but port side runs a constant 9 degrees hotter. At 3200 rpm port gauge reads 174 and starboard 165. I change out my impellers on both engines (just as routine, not specifically because of this temperature issue) - and disconnected all hoses and checked water flow - but it is still the same. I am going to live with it. I like the IR gun suggestion. Thanks for asking this question. The responses were useful.


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[Georgia SeaDawg]

Very interesting. I boat in South Georgia and our water can get very warm, yet my temps have never gone above 161.

 

[Havana Shamrock]

Both engines have new pumps, impellers, and still run around 168*-170* same as before .

 

[Bob Pond]

Had a chance to get the boat out on Lake Erie and ran at normal RPMs for a good period of time. Both engines held at 170 F at 3400 RPMs. While this is a little higher than most of you reported, I guess it could relate to the gauges. Everything functioned well. Thanks for your inputs.

bob

 

[philipp10]

I have the same engines - but port side runs a constant 9 degrees hotter. At 3200 rpm port gauge reads 174 and starboard 165. I change out my impellers on both engines (just as routine, not specifically because of this temperature issue) - and disconnected all hoses and checked water flow - but it is still the same. I am going to live with it. I like the IR gun suggestion. Thanks for asking this question. The responses were useful.


ever try swapping the gauges to see if the difference follows them? As far as the original poster, a 5 degree difference is nothing. The tolerance on the gauges would do that.

 

[tomk]

I also have 8.1s and about five degrees difference 163 and 168 you have to remember that the gauges are not performance gauges