In need of some help. I just signed up here so help me out if you can. My motor starts and idles fine, at high RPMs it runs for a few seconds and looses power and I throttle down to a little under half and does fine but if I try throttling up it does the same. I can shut it off for a few and the same thing happens. getting spark to all cylenders and recently replaced the thermostats. the motor is not overheating. Thanks.
