Hi all, Wife's 90 model 740 having trouble starting and running after it does start. It's the standard 230 motor. When you do get it started it falls on it's face when idling. Restarts and dies again. Restart and if it does keep running it is pulsing between 6 and 8 hundred rpm and putting off some pretty funky fumes out the exhaust pipe. After it warms up it runs good, idling down normal at stop lights and signs. But if you turn it off and try and restart warm it might not start for you. Thanks for your help, Bruce