MtnMax600
New member
This last weekend i went thru insane amounts of fuel. 40 miles on 10.5 gal. Given i was riding in 3 foot deep snow, but still. My friends all say my sled smells like unburnt gas when they ride behind me. And when i stop on the wet pavement i can see the gas on the ground mixing with the water.
So my question is, are there any likely spots that i should check? I know its hard to diagnose over the internet but any direction on where to check would be nice. I havent been able to see where it was leaking from since my sled was dripping wet when i realized there was a problem. I dont think it is coming from the exhaust, but is it possible a lot of fuel is going thru the engine unburnt? Carb problem? powervalve? Any help is appreciated.
PROBLEM #2
I also have sprung a coolant leak on both left and right side heat exchangers right by the rear skid mount brackets. Is it advisable to run some kind of stop leak? or is that asking for trouble? As long as i top off the coolant at the start of the day, it is fine all day but i would like to not worry about that. The fuel leak is my main concern right now.
So my question is, are there any likely spots that i should check? I know its hard to diagnose over the internet but any direction on where to check would be nice. I havent been able to see where it was leaking from since my sled was dripping wet when i realized there was a problem. I dont think it is coming from the exhaust, but is it possible a lot of fuel is going thru the engine unburnt? Carb problem? powervalve? Any help is appreciated.
PROBLEM #2
I also have sprung a coolant leak on both left and right side heat exchangers right by the rear skid mount brackets. Is it advisable to run some kind of stop leak? or is that asking for trouble? As long as i top off the coolant at the start of the day, it is fine all day but i would like to not worry about that. The fuel leak is my main concern right now.
yamaholic22
Active member
For the running board leaks, take it to an aluminum welder and they can fix them up easy in most cases. As for the fuel leak, when was the last time the carbs were cleaned? Its possible that you have a sunk float or stuck float that is holding the needle open and allowing too much fuel in, which will definately throw out a lot of unburned fuel and you will have a very rich cylinder.
MtnMax600
New member
Carbs were cleaned beginning of last season, about 2100 miles ago. I dont think thats where it is coming from tho.
The problem with the heat exchangers is i cant actually see where it is leaking from. There is no noticable damage to tell exactly where it is coming from.
The problem with the heat exchangers is i cant actually see where it is leaking from. There is no noticable damage to tell exactly where it is coming from.
yamaholic22
Active member
MtnMax600 said:
If you take the exchangers off the sled they can be pressure tested under water to see where they leak. I would definately NOT recommend running stop leak in a cooling system like this, snowmobiles need all the cooling they can get and often those stop leaks gum everything up and restrict flow.