2005 Mercury 60 bigfoot outboard throttle/rpm issues-on pontoon boat....NEED HELP!!

bullprf

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Jun 4, 2015
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I have a pontoon boat with the 2005 60 horse Mercury bigfoot motor. The problem is, the boat idles at 1100 RPM per the computer readout from the mechanic. i beleive he said it should be between 750-900 RPM. So thats not the only problem, so from 1100 RPM, when you push the throttle forward to increase speed, it jumps right to 2200 RPM. When you back the throttle down, its jumps right down to idle. its very strange!!! There is "NO IN-BETWEEN 1100 and 2200 RPM." Mechanic said there was no error codes on motor, 196 hours on it. Everything else reads normal. Mechanic is a certified mercury mechanic and has 20 years experience. please help..Bruce
 
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