Hello Don and everyone else. I have a '07 Optimax 150 1B506951 withe the following mods:
Simon Motorsports ECU tune and lighted flywheel
CCMS Sport Reeds
The problem I'm having is the motor wants surge at idle about 50-100 RPMs when running on the hose. It doesn't seem to do it when actually in the water. The issue started after installing the tune and flywheel. The motor idled fine on the hose with just the reeds. I talked to Eric Simon about it and he said it could be the reeds and that he doesn't change any parameters on the lower RPM range of the tune. He even took a second look at it. Any ideas? The motor runs perfect other than this. Should I even worry about it?
The plugs have about 25 hours on them and the fuel system is new from the fuel tank to the VST.