skidooman383
Extreme
Looking for some opinions on what I should be looking at in regards to what my problem is on my 2008 Nytro. I have just over a 1,000 miles and up until today I have not had one issue yet.
Today we were riding in great snow conditions all day, it was 15 degrees F. The first 45 miles were fine then as we were going down the trail and came to a stop sign I slowed and began to take a slow sharp corner. All of a sudden the sled would not go. I hit the gas and burped the throttle it just would not speed up. I looked at the gauge and the warning light and engine light weas flashing. I did not catch an error code. I then got off the gas and let it idle for a few seconds. Then the warning light went away along with the engine light. I never shut off the motor and I proceeded on. For the next 4 miles it ran perfect. It acted up like this for about 20 seconds total.
Then I met up with my group. I pulled over and idled it for 30 seconds then when I went to get back on I noticed the temp light was on steady along with the warning light. I shut off the motor and looked at the over flow bottle. The overflow bottle was overflowing and both the top and tunnel radiators were hot.
Two more times during the ride the temp light came on so I had to stop and let it cool. I went about 15 to 25 miles between times when the light came on.
Here is my question do you think I might have a bad thermostat?
Also when the engine light flashed and it shut down to limp mode could that be becasue the temp light was on long enough and I just didn't see it so it went into limp. But if it did why would it clear its self so fast?
Any help woulod be appreciated.
Today we were riding in great snow conditions all day, it was 15 degrees F. The first 45 miles were fine then as we were going down the trail and came to a stop sign I slowed and began to take a slow sharp corner. All of a sudden the sled would not go. I hit the gas and burped the throttle it just would not speed up. I looked at the gauge and the warning light and engine light weas flashing. I did not catch an error code. I then got off the gas and let it idle for a few seconds. Then the warning light went away along with the engine light. I never shut off the motor and I proceeded on. For the next 4 miles it ran perfect. It acted up like this for about 20 seconds total.
Then I met up with my group. I pulled over and idled it for 30 seconds then when I went to get back on I noticed the temp light was on steady along with the warning light. I shut off the motor and looked at the over flow bottle. The overflow bottle was overflowing and both the top and tunnel radiators were hot.
Two more times during the ride the temp light came on so I had to stop and let it cool. I went about 15 to 25 miles between times when the light came on.
Here is my question do you think I might have a bad thermostat?
Also when the engine light flashed and it shut down to limp mode could that be becasue the temp light was on long enough and I just didn't see it so it went into limp. But if it did why would it clear its self so fast?
Any help woulod be appreciated.
yamahahaha
TY 4 Stroke Junkie
they ice up under neath. only in certain conditions.
yamahahaha
TY 4 Stroke Junkie
once the underneath is all dry spray it with cilicone I think i heard on here... the water/snow falls off it I guess
zeke66
Expert
From what I have read, if the temp gets too high, it just shuts the engine down. Had it happen to me once, got too hot and I never noticed the light, engine shut down.
It does sound like a bad thermo though.
It does sound like a bad thermo though.
Grimm
TY 4 Stroke God
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The engine does not shut down due to the engine temp light coming on while riding. That only happens when the engine is at idle.
What I believe caused your initial shut down was the TORS acting up. Perhaps an adjustment to the throttle cable is needed.
Regarding the overheat light coming on, were the conditions hard packed? Not enough snow hitting the heat exchanger can cause this. Also you could try cutting down the antifreeze mixture in the radiator by removing some and adding distilled water. I think I read somewhere that Yamaha uses an antifreeze mixture that provides protection down to -68 degrees, so watering it down shouldn't hurt none.
The best way to reduce overheating is to add a tunnel heat exchanger, the same one found on the Nytro MTX.
What I believe caused your initial shut down was the TORS acting up. Perhaps an adjustment to the throttle cable is needed.
Regarding the overheat light coming on, were the conditions hard packed? Not enough snow hitting the heat exchanger can cause this. Also you could try cutting down the antifreeze mixture in the radiator by removing some and adding distilled water. I think I read somewhere that Yamaha uses an antifreeze mixture that provides protection down to -68 degrees, so watering it down shouldn't hurt none.
The best way to reduce overheating is to add a tunnel heat exchanger, the same one found on the Nytro MTX.
skidooman383
Extreme
Grimm said:
Ok, I'll check the TORS tommorrow. As for snow it was perfect nice and loose with lots of it.
I'm going to try and replace the thermo and maybe I will try and add little water to aintifreeze. Then see what happenes.
skidooman383
Extreme
Well got my new thermostat in today and 8 miles down the trail the temp light came on. So we stopped at a bar and let it cool down then drove home. Once I got home I shut the motor off. Then a minute later started the sled and the temp light was on. I then happened to notice that the fan was not running. I assume the relay is bad so I will be changing it, and go from there.
Does anyone know if I can get these relays at an auto parts store. Or do they have to come from Yamaha.
Does anyone know if I can get these relays at an auto parts store. Or do they have to come from Yamaha.
berge75
Expert
I hope your oil pump drive chain didn't fall off inside the motor. I think the chain also drives the water pump,and from what your describing, it doesn't sound like the impeller is turning. I'm not sure what drives the water pump exactly,but I would check to see if the water pump is turning.
skidooman383
Extreme
berge75 said:
If the chain did fall off I would think I would hear a strange noise of some sort. Everything in the motor sounds normal and I have never heard anything that would lead me to think otherwise.
My warranty expired as of January 3, 2010 so hope its not more then relay.
I just don't think it is the water pump because I would think it would over heat much quicker if it wasn't pumping.
nate007
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If you're radiators were hot its not the waterpump. Start with the relays, and if you know how to bypass them, simply test the fans as well by putting power directly to them. You're issue has to be either the fans, the relay, or the sensor if you said it does it when you slow down? if you are cruising the trails its fine?
Also, when the sled is cool, check the coolant in the radiator. There could be an issue with the overflow tank/lines, and it may be running low, or possibly have some air trapped as well. Long shots at best on those two, but never hurts to look at everything.
Also, when the sled is cool, check the coolant in the radiator. There could be an issue with the overflow tank/lines, and it may be running low, or possibly have some air trapped as well. Long shots at best on those two, but never hurts to look at everything.
skidooman383
Extreme
ok thanks
skidooman383
Extreme
Ok I feel totally stupid.
I had looked at my fuse for the fan last night when out in the dark and I must not have seen that it was bad. Looked at it again today in the garage and saw the fuse was bad. Switched it out hope that is problem solved.
I had looked at my fuse for the fan last night when out in the dark and I must not have seen that it was bad. Looked at it again today in the garage and saw the fuse was bad. Switched it out hope that is problem solved.
