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Jan 23rd, 2013
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Engine lost prime #12322906
07/04/17 01:49 AM
07/04/17 01:49 AM
Joined: Mar 2012
Posts: 213
Georgetown Texas
j791 Offline OP
Outdoorsman
j791  Offline OP
Outdoorsman

Joined: Mar 2012
Posts: 213
Georgetown Texas
I was running at 5000rpms when the motor abruptly shut off. I went to the prime bulb and noticed it was not holding the prime. The fuel gauge shows over half a tank. What should I trouble shoot first?

Re: Engine lost prime [Re: j791] #12322927
07/04/17 02:11 AM
07/04/17 02:11 AM
Joined: Aug 2016
Posts: 536
Dallas texas
T
Tc24 Offline
Pro Angler
Tc24  Offline
Pro Angler
T

Joined: Aug 2016
Posts: 536
Dallas texas
If it stays running as long as you keep pumping the bulb I would suspect air is getting in somewhere between the gas cap & the carbs. I had to replace my bulb earlier this year due to it going bad..

Last edited by Tc24; 07/04/17 02:13 AM.

1998 Pro Gator 160V
Re: Engine lost prime [Re: j791] #12322965
07/04/17 02:31 AM
07/04/17 02:31 AM
Joined: Mar 2012
Posts: 213
Georgetown Texas
j791 Offline OP
Outdoorsman
j791  Offline OP
Outdoorsman

Joined: Mar 2012
Posts: 213
Georgetown Texas
[url=[URL=http://s494.photobucket.com/user/j79129/media/IMG_9177_zpswzl2w6ey.jpg.html][/url]]Sucking sound[/url]

When I press the primer bulb, I hear and feel a sucking sound coming from the black hose in the pic

Re: Engine lost prime [Re: j791] #12323029
07/04/17 03:21 AM
07/04/17 03:21 AM
Joined: Aug 2003
Posts: 235
Spring Branch, TX USA
C
CADD Offline
Outdoorsman
CADD  Offline
Outdoorsman
C

Joined: Aug 2003
Posts: 235
Spring Branch, TX USA
It's probably a bad diaphragm in the fuel pump. The picture looks like a mechanical fuel pump (they operate on crankcase vacuum)


2001 Pathfinder 2200V 150Vmax HDPI
2015 Diablo Amigo (Sand Fleck)

Re: Engine lost prime [Re: j791] #12323275
07/04/17 12:52 PM
07/04/17 12:52 PM
Joined: Mar 2012
Posts: 213
Georgetown Texas
j791 Offline OP
Outdoorsman
j791  Offline OP
Outdoorsman

Joined: Mar 2012
Posts: 213
Georgetown Texas
Thanks, it's really disappointing considering this is a new 2016 motor with very few hours.

Re: Engine lost prime [Re: j791] #12323495
07/04/17 03:53 PM
07/04/17 03:53 PM
Joined: Mar 2012
Posts: 213
Georgetown Texas
j791 Offline OP
Outdoorsman
j791  Offline OP
Outdoorsman

Joined: Mar 2012
Posts: 213
Georgetown Texas
I took off the water fuel separator filter and noticed the rubber seal had become dislodged from the top of the filter and came off? Has anyone had issues with the Yamaha filters?

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