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Discussion Starter · #1 ·
I just purchased an atv and I dont think the fan works. I know they are air cooled so i'm afraid to overheat it without the fan..Is this a common problem and is there an easy fix? Also will it hurt the atv if I ride it without the fan working? It will be used mostly for working cows and spraying pasture, building fence and things like that...

any suggestions would be appreciated..

Eric Nykamp
903-746-7146
 

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are you asking why the fan isn't working ?..the fan shouldn't come on..and stay on..it's only suppose to come on when your engine get's too hot..it works off the temp sensor..if it get's too hot..it sends a signal to the fan control unit..which relays to turn the fan on..now..if your asking if the fan works at all..just unplug the hot lead from the wire harness..and put some power to it. if it comes on when you do that..then either your oil temp sensor..or oil temp/fan control unit needs to be replaced.
 

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Discussion Starter · #3 ·
ok thanks..We rode it for about 30 min. and I don't know if it ever came on. Maybe I just didn't hear it. I will pay more attention over the next couple of days, its probably alright I am just a rookie and have alot to learn......
 

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ok thanks..We rode it for about 30 min. and I don't know if it ever came on. Maybe I just didn't hear it. I will pay more attention over the next couple of days, its probably alright I am just a rookie and have alot to learn......
lol..it's cool..you will learn alot from this formus..some really good advice..tips..you name it..if your engine is anything like my 89 trx350d 4x4..you really have to heat the engine up to get the fan to come on..it takes anywhere from 300 to 400 deg. before my fan will kick on..these old 350's are some tough azz engines..takes alot to get it hot...matter of fact..i think the only time the fan ever came on is..one time after i got it running..i let it sit there in one spot..reving it up..just to see if the fan would come on..lol..it did..sooo..i asked my buddy at the honda shop..his words were..''that thing has to get wayyyyy up in temp..i asked about how much..when he told me..i was like..danggggggggggggg..lol.
 

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Yeah, like shadetree said, you have to run them pretty hard before the fan will kick on. Normal riding usually won't do it, unless it's hot and you are going along real slow in 1st gear or something or unless you hold them wide open for a while. If you want to listen to see if the fan is running, leave the key on and turn the engine off with the kill switch and the fan will stay running until you turn the key off or until it gets cool. That is, if the fan has kicked on.
 
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