Well today I finally was able to go out and run my new (well new to me and my first Popo) 700. I bought it used and it has been in and out of the shop do to idling issue which was the wire harness for the EFI. So any how found a little mud pit and wanted to try it out and the new tires (swamp-lites). After playing there was another Popo 500 efi '05 playing in the mud too. Well we took off to the trails and the next thing I look down and see HOT flashing so I stopped. The guy with the 500 stopped with me, I told him what was going on and asked about the fan running (his was not even running). The fan was running, I looked at the bottle and it was all the way to the top (like over filled, which is weird since the coolant is in the middle at pre run). So I thought well my radiator might be clogged, so I unscrewed the bottom of the screen and looked up and only the bottom part was clogged but 70% was clean. The guy told me that he has had his clogged up and never ran hot. So I let it cool down and then would drive till I see HOT. Turn off and wait to cool down. So on and so until I got back to the trailer. When I got home the coolant level was in the norm.

So the question is could it be the thermostat since the bottle was full to the top or the water pump or the cap? The times I have rode my ATV it seems the fan runs a lot, my average ride speed is 5-20mph since my daughter is following on her ATV. This is the first time I have hit the mud so and it has now made me think twice.


Thanks for any info,

Jim

 

might be the radiator cap, had one come in a couple weeks ago with the same problem turned out to be the cap, so pressure test it or replace it and see it that fixes it

 

The fan on my 800 runs at least twice as often as my 500. You could replace the thermostat for peace of mind, its a simple job.

 

welcome yankee to the forum. there is nothing wrong w/ your thermostat. if you have a 30% blockage or the front of the radaitor that means the back (towards the fan) is most likely blocked even more. these twins (unlike the guys 500 you were running with) runs alot hotter then the singles, so it takes less of air restriction to make them run hot. the antifreeze level rose because it was getting ready to boil over as heat expands the coolant. this is why you have it between the cold and hot mark and notto the top when it's cool. take the rad/ shrouds and even the fan off to get to the backl of the radaitor and clean it thoughly so you can see thru the fins to the other side. i had my 06' so bad i had to take my radaitor out and clean it. make sure to clean it real good after every ride thru the mud as it will bake right to the hot radaitor.