1991 evinrude 25 horse problem

rob9128

Recruit
Joined
Jan 9, 2012
Messages
2
I just joined so I hope I'm doing this right. I have a problem I haven't seen that is exactly like mine. 25 horse 1991 evinrude, Most of the time it starts fine but once in a while it take a lot to get it started. The main problem is as I'm idling out it will run good then it will miss then be fine for 15 seconds or so then miss again. It only does this at idle speed in forward gear. If I go up a bit with throttle it runs great. At full power it also runs great. Only at idle speed with a load on does it miss every 15 seconds or so. I put new plugs in so far but to no avail. Anyone have a fix on this because it's driving me nuts.
Thanks
 

jasper60103

Commander
Joined
Sep 18, 2008
Messages
2,055
Re: 1991 evinrude 25 horse problem

I just joined so I hope I'm doing this right. I have a problem I haven't seen that is exactly like mine. 25 horse 1991 evinrude, Most of the time it starts fine but once in a while it take a lot to get it started. The main problem is as I'm idling out it will run good then it will miss then be fine for 15 seconds or so then miss again. It only does this at idle speed in forward gear. If I go up a bit with throttle it runs great. At full power it also runs great. Only at idle speed with a load on does it miss every 15 seconds or so. I put new plugs in so far but to no avail. Anyone have a fix on this because it's driving me nuts.
Thanks

Welcome to iBoats. Your problem sounds like a lean sneeze.

edit: I would try adjusting the carb SS needle a tad richer. Turn it CC wise 1/8 turn and see if it that helps. For reference, the link below is the complete carb adjustment procedure. See (Carburetor Adjustment - Single S/S Adjustable Needle Valve). Post back if you have any questions and let us know the results.
http://forums.iboats.com/showthread.php?t=167352
 

rob9128

Recruit
Joined
Jan 9, 2012
Messages
2
Re: 1991 evinrude 25 horse problem

I will sure try it. I want to thank you for your help.
 
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