First of all let me welcome myself! I have been a long time lurker.
I have a 96 sportsman 500 (as if the title didnt tell you that) that is cutting out under load (sometimes).
Repair history is as follows.
Quad was torn completley down for a frame up rebuild, and this problem did occur before tear down. All new fuel system componets. Fuel stems in tank, lines, fuel pump, selector valve, and filter. The carb was torn down, soaked and rebuilt with new jets etc. Float was adjusted (twice). New plug also.
In the begining, I thought that it was starving for fuel when it was cutting out on its top end. However after some careful consideration, testing and thought, I am leaning more towards an ignition problem. It is an intermitant problem, that doesnt happen all the time. Can be anyware from 1/4 to WOT and when it is loaded, hill, pushing snow, etc it begins to backfire and pop.
There is no exhuast restriction, and the ETC switch has been checked and re-checked.
The plug is comming out like it is running a little rich, and when I have another person ride the quad, and make it stumble it does puff some nice carbon out of the exhuast. A compression test was done, as well as a CLD test. The readings are not perfect, but acceptable for a 14 year old engine.
I have tested the coil, and the readings are off, but not by a long shot.
Same goes with the rest of the ignition system.
Thoughts?
I have a 96 sportsman 500 (as if the title didnt tell you that) that is cutting out under load (sometimes).
Repair history is as follows.
Quad was torn completley down for a frame up rebuild, and this problem did occur before tear down. All new fuel system componets. Fuel stems in tank, lines, fuel pump, selector valve, and filter. The carb was torn down, soaked and rebuilt with new jets etc. Float was adjusted (twice). New plug also.
In the begining, I thought that it was starving for fuel when it was cutting out on its top end. However after some careful consideration, testing and thought, I am leaning more towards an ignition problem. It is an intermitant problem, that doesnt happen all the time. Can be anyware from 1/4 to WOT and when it is loaded, hill, pushing snow, etc it begins to backfire and pop.
There is no exhuast restriction, and the ETC switch has been checked and re-checked.
The plug is comming out like it is running a little rich, and when I have another person ride the quad, and make it stumble it does puff some nice carbon out of the exhuast. A compression test was done, as well as a CLD test. The readings are not perfect, but acceptable for a 14 year old engine.
I have tested the coil, and the readings are off, but not by a long shot.
Same goes with the rest of the ignition system.
Thoughts?