18xd starting but wont stay running...

jeridday

Cadet
Joined
May 1, 2009
Messages
15
I just picked up an 18xd, electic start model, as a spare engine/parts donor for my 25xd. It has been sitting for a while. The gentleman I bought it from told me he put a carb kit on it but he could only get it to crank and run with the throttle open. It has been sitting for a while but I'm not sure exactly how long it has been since it ran. I cleaned the carb, changed the plugs, and hooked it up to some fresh gas.

I spent a while priming the carb, cranking it, and the motor would fire up and die. It did that repeatedly. It finally cranked and ran when I held the throttle open by pulling the control lever forward. After it started running I let go of the control lever but the motor kept running at a high rpm. After about 15 seconds the motor did not drop in rpm so I turned off the ignition.

What kind of issue does it sound like and what might I be able to do to remedy the problem???
 

mark_gober

Petty Officer 3rd Class
Joined
Jan 12, 2009
Messages
76
Re: 18xd starting but wont stay running...

Jerrid,

I have this exact motor...have you adjusted the screw directly above the intake on the carb? Mine is pretty tight tolerance. 1/2 turn too far and it won't start without some serious tweaking on the throttle and it'll die was soon as you let off the throttle. When I set it correctly though, it'll run perfectly. Mine sets somewhere just below flush with the face of the carb. Somewhere in there is where you want to be.

Mark
 

jeridday

Cadet
Joined
May 1, 2009
Messages
15
Re: 18xd starting but wont stay running...

Hey Mark, thanks for the info...

No, I haven't made any adjustments to anything. But I will check that and see where it gets me.

Jerid
 
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