PRM's jumped up this weekend

[baseballfatty]

1990 Johnson 200 GT
I added a can of seafoam to my tank of gas this weekend and added a wp guage to my motor. When I took her out Saturday to run her, she started out running fine but after stopping to fish for about 30 minutes things changed. We cranked up to leave and I noticed that the motor was surging and at WOT my RPM's jumped about 800 to 1000 RPM's. Could this be the seafoam making it run at a higher RPM or should I let a mechanic look at it?

[THE WITCHDOCTOR]

More than likely were it got all that old carbon cleaned out!

[baseballfatty]

Thanks Witchdoctor!

If it blew all that carbon out wouldn't it have picked up some speed?

[Bassmeister]

You would think so, check for spun hub.