Idle is too high

[shawn]

Can't figure out why all of a sudden my boat is idling so high, around 1200 RPM's.  When I reset the the perko it's fine, then when we slow down again it's right back to 1200.  I checked all the perfect pass linkage and reset the system and no change.  I thought about adjusting the idle but when i reset the perko it's fine.

Any thoughts or suggestions?

thanks

[cyclone]

The only time I've had high idle problems was when I had a slight kink in my throttle cable linkeage. Having it disappear when you kill power makes me think you might have a bad sensor. Or, a problem with the PP servo, you should watch what it does when the boats giving you grief and you are cycling the perko. The servomotor can lose a phase and do really goofy things. You can run the servo test from the pp manual to make sure it's fully functional.

There are some tests you can do with a multimeter in the engine manual for various sensors, throttle position motor, etc. and there's (at least for now!)  the scan tool if you need it.

[shawn]

When the boat is in the neutral position, where should the RPM's be?  I searched and only found RPM's at idle (600-800), but nothing for being in neutral.

[cyclone]

It should be 600-800 at idle, both of my boats have been around 700 I think. It shouldn't vary up and down in neutral.

You should try lubricating the throttle cable, I use the graphite stuff from the Harley dealer with the little metal tube that screws on the bottle.  I'd also clean the MAF, throttle body and the flame arrestor.