My 2001 F15 on my tender has always run perfectly up until now. It starts easily, but at high idle for warm-up it coughs and jerks a bit. Pulling out the choke momentarily will get the normal smooth high idle, but lowering the idle and then speeding up again will give the same result. The last time out on the water I had to return dur to poor running. It's a hassle to put it on a trailer and take in for service, but I am at the limits of my skills after checking all the basic functions. Any thoughts would be appreciated.
Open Wide
Open Wide