Originally Posted by
freakdave
I am having the exact same problem. Optimax 150 DFI 2011 model. High idle at neutral sounds like crap too. the idle goes up and down when trim switch is raised and lowered. Once it goes into gear, clunk due to high idle, it seems to run ok. Strong odor of gas when cowling removed. Again while it was high idle it sounded terrible like there was a mixture problem of sorts. Diaphragm issue? Any way I can check too see?
Serial number 1B846673. Not trying to highjack thread, just trying to diagnose proble. Bobco, issues resolved? Could it be a bad battery? Low voltage telling motor wrong info, plus why would idle change when tilt raised lowered