What causes a snowmobile to idle high?
High idle is caused by a lean condition. You can adjust the carbs using the fuel screws and/or air screws if you carbs have air screws(older models didn’t). Turn fuel screws out or air screws in. However, make small adjustments as many times it’s tough to find a sweet spot.
What should my skidoo idle at?
Idle should be about 1000-1500, clutch should engage at 3500-3600rpm.
How many rpms should a snowmobile idle at?
1500-1700 rpm for idle is pretty normal when fully warmed up. Don’t worry about the high idle down syndrome…its normal. For mostly drag racing on packed snow these sleds rip with an almond/gold spring and 62 weights in the primary.
How do I know if my snowmobile is running lean?
Check your spark plug color. That is the easiest way to determine if it is running lean. Your spark plug should be a nice tan color. If it is white you are running too lean.
What RPM does a snowmobile clutch engage?
It will engage around 4300 rpm with 60 weights.
What does it mean when a snowmobile is running lean?
If it is white you are running too lean. If it is black you are running too rich.
What does running lean mean on a snowmobile?
#6 · Oct 27, 2007. If you are running lean, you replace the main jet with a bigger one. If the plugs are white or grey-white, you could be lean. If the plugs are cardboard brown, you are ok. If the plugs are black, you are rich.
How do I lower the engagement RPM of my clutch?
Installing a spring with a lower starting rate will lower engagement RPM. If your top RPM is good you want to keep the finish rate of the new spring something very close to the current finish rate.
How do I know if my snowmobile is running rich or lean?
Kill the engine and without taking your hand off the throttle, coast to a stop. Pull the plugs. If they are white or grey, you are too lean. If they are black, you are too rich.
How do I know if my snowmobile is running rich?
To check if you are running rich or lean, run the sled WOT for 1/2 mile to a mile. Kill the engine stop as fast as you safely can. Pull the plugs out, also as quickly possible. They should be a tan color, some describe it as a cardboard color.
What do heavier clutch weights do?
As the engine rpm increases, the clutch weights swing out against the rollers in the spider tower, generating a force that quickly overcomes the spring pretension. The greater the weight of the flyweights, the higher the squeezing force and the higher the horsepower capability.