I have a 2000 Yamaha 115 Four stroke with EFI. I really love this motor and have been very happy with it. I have almost 300 hours on the motor and take good care of it. I am seeing a problem lately (has only happened twice) where the idle has suddenly stayed high or varied up and down. Both times it happened the weather was cool and damp (I think the dampness is the key). Could this be some sort of sensor problem? Do these things have an air flow sensor on them like a car?<br /> 
<br />Thanks for any help.
<br />Thanks for any help.