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Discussion Starter · #1 ·
Hi,

I own a used 2002 Honda Rancher 350. I decided to buy a Honda because I know they are known for their durability and power, for anything I would need it for. I always noticed that my legs would feel the heat from the engine, and I wanted to make sure my components weren't overheating, before I damage anything accidentally. I used my temp. gun to take the readings from various parts, they are listed below:

These are temperatures after around 30 minutes to an hour*

Cylinder: Around 280 Degrees F
Crankcase: Never exceeded 190 Degrees F
Exhaust straight out of the cylinder: ~600 Degrees F
Radiator: Around 150-160 Degrees F

The rancher did not come with a radiator fan because it is a 2wd version, but I ended up buying one to wire to a switch, I just have not gotten around to installing it yet.

Are these Temperatures normal? Should I install that fan? What temperatures would be dangerous for the block and cylinder? I use Marvel Mystery Oil in every fillup.

My machine might be running lean because of the change in ethanol levels over the years, but again, I am no expert, any help would be appreciated!

Thanks!
 

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I'm not a pro with Utility but I know I little bit....... your engine is designed to run within a specified temperature range which is automatically controlled by your thermostat and fan. Making changes to that automation (such as making your engine run cooler with a manual switch) can actually hurt the performance and efficiency of your engine. As they say, "if it's not broke, don't fix it."
 

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Discussion Starter · #3 ·
I agree with you, except for the fact that the engine does not have a fan or (to my knowledge) a thermostat, it is all air cooled. I want to know if I should be doing something different before I harm any components. Thanks for the the feedback
 

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Right I'm sorry.... its early lol...... these bike do run pretty hot after a while....it all depends on what you're doing.... some one will be along to help you out :)
 

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I have that same quad. It does run on the hot side, not sure about temperatures though. I haven't measured mine. As long as that overheat light doesn't come on then your good. The red light next to the neutral light. It should come on on start up and turn back off so you know it's working.

As for the fan... if your going to be doing heavy 1st or 2nd hear work where your working it hard and moving slow I would kick the fan on... other than that you don't really need to. It gets enough airflow when your at speed
 

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Those temps you posted are normal and fine... your crankcase temp is below 200 degrees which means the oil is not overly hot... so its all good!
 

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Same basic atv , the 2002 trx450fm , heat , water = steam and sort pants are a bad combo = rode all day no problems then afterwards the right leg was burning
 

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