115 Yamaha Idling issue

toonin22

Petty Officer 3rd Class
Joined
Oct 28, 2008
Messages
87
I have a 93 Yamaha 115hp solid compression good fuel and strong spark It will run for a minute and then dies out. If I pump the primer bulb it will continue to run so I replaced the fuel pump. It still died...found a small pin hole in the second carburetor fuel line cut it out and it ran fine ran it three days in a row no problems...Cranked it up yesterday and it did the same thing....Checked carbs they were clean fuel pump was pumping fuel no visible leaks in any fuel lines.....Should I just replace the fuel lines? Any ideas would be appreciated. Wondering if I overlooked something...
Thanks for your help
 

toonin22

Petty Officer 3rd Class
Joined
Oct 28, 2008
Messages
87
Re: 115 Yamaha Idling issue

The fuel line going to the bottom carb had a pin hole leak letting to much air into the system. Once that was repaired it would idle fine but wouldn't run above an idle due to a clogged anti siphon valve
 
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