Won't Run at Idle - Runs Great Going Fast - HELP!

[capsnumber1]

I have 1989 Evinrude 120HP 2 Stroke VRO. When running at idle it runs really rough – it bucks and sputters, and tries to stall. It sounds to me like it is missing – although I am not a mechanic. When you put the engine into gear, one click off of idle the engine will sputter and stall. If you have the engine in neutral and open up the throttle immediately, the engine will run strong going fast. The only problem is at idle and just above. I have replaced the powerpack and ignition switch. The kill switch is disconnected while I await a new one. Looking at my repair manual I see that there is a knob on the throttle arm that will effect idle when it is adjusted. My engine is missing this knob. I don’t know if it is missing the spring as well because I don’t know if that is supposed to be in the knob or if it is in the arm farther back. It looks like the previous owner may have busted the threads to this knob. I can’t tell since I don’t know how far up the arm the threads are supposed to run. Click on the hyperlink to see a picture of what I am talking about. The thread is right at the bottom of the picture. Is the thread running up as far as it is supposed to, or is it broken?? Could this be the cause of my problem?? Thanks!

http://img513.imageshack.us/img513/6960/1000849tc2.jpg

 

[87Aggie]

Re: Won't Run at Idle - Runs Great Going Fast - HELP!

Sounds like you just need to rebuild your carbs, thorough cleaning, inside and out with with new carb kits.

 

[tashasdaddy]

Re: Won't Run at Idle - Runs Great Going Fast - HELP!

your link and sinc may be out also. look it up in your manual. sets carbs and electrical advance together.