I have an 86 200hp blackmax that runs real well. However, I have some nagging issues with the throttle controls. I think they are ultimately related. I have the 'commander' series of controls (remote choke and up tilt, also up and down tilt on the throttle lever. Fast idle is achieved by pressing the button at the base of the throttle.)<br /><br />1) Idle speed in gear is about 500rpm. This SHOULD be about 700, but no more than 750, right?<br /><br />2) At mid to high rpm, the throttle will 'back off' by itself (ie, if i set the throttle at 3500rpm for a comfortable cruise at about 20kts, the throttle will back off to 3200 by itself if I dont hold it. This also applies for high rpms, where i push the throttle down to say 4500rpm, if i lift my hand off the throttle it will back down to 3200 all by itself. Where can i fix this, is it at the motor, or in the control box itself?<br /><br />3) There is a lot of 'slack' in the throttle before you actually get into an area where the rpms go up.. The throttle lever is almost at 3/4 before I just start increasing the throttle off of idle. <br /><br />4) WOT is about 4800rpm and about 31kts. At least thats the throttle pushed to the stop. Could that slack be keeping my from hitting true WOT, pushing up to 5500 rpm? The previous owner said he had the boat into the 50mph range. Granted this could be prop related, but i should probably fix the throttle problems before i start throwing $400 propellers at it.