99 Big Bear spitting sputtering and backfiring HELP!!

Have a 99 big bear that runs great most of the time. when riding it will start spitting sputtering coughing then die and let out a big backfire. it is very intermittent. it may run for 30 min or 30 seconds. also when i kill it under normal conditions most of the time it will pop out the tail pipe. not sure if these are related or not. i have changed air filter coil plug fuel filter and cleaned the carb. also, the starter button sometimes wont start it. push the button and the oil light comes on but the starter doesnt spin. not sure if this is a solenoid problem or wireing. dont think these are related but i guess you never know. like i said it runs great untill it decides to act up. im just worried im gonna be out in the sticks and its gonna act up and wont restart. any help will be greatly appreciated. thanks

run some sea foam through it. its like magic

got seafoam in it now. havent ran a full tank through it yet. As far as the electric start goes Im gonna have to get into the wires cause I found this evening when it doesnt want to start the blue and white wire is dead.

not sure on the wires. good luck

Thanks, if I could get it to run right I'd just pull start it for now

if the seafoam dont work rebuild carb. The gas we have these days is not kind to these machines. too much sugar in the gas.