A long time ago I had posted regarding the above. My engine has an idle speed knob on the side that was not making contact with the vertical throttle shaft. The purpose of the feature is to be able to set your slow speed to a predetermined trolling speed. Well after years of no solution I found the answer in Mr. Leroy Wiesner's (FAQ) article regarding the 9.9 and 15's. I thought it would be good to share it as some had left me a message asking if I ever found the problem as they were having the same problem. What I found was a reference made to the aligning of the two beveled throttle gears inside the cowling (where the throttle movement turns from horizontal to vertical) These gears need to be aligned and have reference marks which are a dot on one and a slot on the other. I got to thinking if these gears weren't set right that may be why the vertical cam doesn't come back far enough to reach the idle speed adjustment shaft and sure enough, that was the problem. I aligned the gears and all is well. I hope this might help if your having a problem with yours. Rick.
