Yamaha F115TLRB High Idle

[coueytwo]

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Got a 2003 F115tlrb that idles at 1500 rpms, ran Yamaha Diagnostics on the motor no active faults. can hear a vacuum suck coming from the Body Assy area behind the throttle body, shot carb cleaner into the area found the joint coming from the isc was sucking air through the holes manufactured into it. I have read both the Yamaha and aftermarket manuals, completed the volts and ohms test, both checked good. I do not hear any rattle from the ISC when I shut off the motor. need some of those great ideas from you guys.

[boats.net]

Sounds like like a bad idle control vlave, try running active test on valve with Yamaha Diagnostic.

[coueytwo]

I ran the diagnostic program never got anything to to show a fault, You guys went off the line for a while, so, hoping not to have to eat a $350.00 part, I went ahead and replaced the ISC, it did the trick, went right down to Idle speed and have had no other problems.
Thanks