Serial # H177B39323A Mazda powerplant. Unit had fried starter and replaced. Unit is firing but will not start (fried starter). Can turn on IGN switch and fuel can be heard entering throttle/mixer for appr. 1.5 sec but will not hit, Can use carb cleaner shot and will start and run fine as long as shots are being delivered. Seems unit would hit on the propane delivered on key on cycle. Any suggestions will be appreciated as this and one more will make 2 with this fuel set up i have worked on.