1990 indy 400 problem

[sundown]

I've got a 1990 Indy 400 that I use to pull my cross country ski trail groomer. It runs great when first started,but starts to miss after 10 minutes or so and will die shortly thereafter. I put it on the hoist yesterday and pulled the stator thinking it was a coil issue. It has the 200 watt pulseless magneto and the exciter coil reads properly when cold, 164 ohms. When I heated it under a heat lamp for a short while the resistance went up to about 197 ohms. Does anyone know if this is normal? That seems like a lot of change to me. Any other ideas as to what the problem might be would be appreciated.

PS: The resistence of the lighting coil during the heat process didn't change at all,although it is a much heavier winding.

 

[mikes99ss]

Sounds to me like a stuck choke

 

[winter_time]

I've got a 1990 Indy 400 that I use to pull my cross country ski trail groomer. It runs great when first started,but starts to miss after 10 minutes or so and will die shortly thereafter. I put it on the hoist yesterday and pulled the stator thinking it was a coil issue. It has the 200 watt pulseless magneto and the exciter coil reads properly when cold, 164 ohms. When I heated it under a heat lamp for a short while the resistance went up to about 197 ohms. Does anyone know if this is normal? That seems like a lot of change to me. Any other ideas as to what the problem might be would be appreciated.

PS: The resistence of the lighting coil during the heat process didn't change at all,although it is a much heavier winding.

It sounds to me like you need a stator. However I am not sure what the specs are for it usually they have a range for what it can be but almost 40 ohms seems to be alot. I would call a dealer and ask them to look up what the specs are for your stator and go from there. It makes sense that when it heats up it throws off the timing some and causes the running issues.