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Topic: Air in my fuel system, engine won't stay running! (Read 973 times) previous topic - next topic

Air in my fuel system, engine won't stay running!

Guys I have the strangest problem with my M11. You can start it up and it will run for 30 seconds then die. It takes me a bit, but I can get it re primed and started then it runs fine! It seems I am getting air in the fuel lines somehow.
thanks
Mark
Mark Self
1997 40' U320
2005 LX7 Suzuki
USPSA-a18138
Ham radio-WM5S
Driving my Daughter Shea to Sporting Clay shoots is my Job!!!!

Re: Air in my fuel system, engine won't stay running!

Reply #1
That is the most common cause of the problem, particularly if you have the Winn system.

Start by checking fuel filters, as that is a high percent source of air getting into the fuel system.

Brett Wolfe
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Air in my fuel system, engine won't stay running!

Reply #2
If you have the clear prefilter one of the o-rings is sucking air.
The selected media item is not currently available. Dave Head & Megan Westbrook
Titusville, FL - The Great Outdoors
'98 270 buying this month
Toad is a 2018 F150 XLT

Re: Air in my fuel system, engine won't stay running!

Reply #3
I got in and started looking at the filters. I have the clear prefilter and a bag hanging down with a hose in it :o
Mark Self
1997 40' U320
2005 LX7 Suzuki
USPSA-a18138
Ham radio-WM5S
Driving my Daughter Shea to Sporting Clay shoots is my Job!!!!


Re: Air in my fuel system, engine won't stay running!

Reply #5
Quote
I have the clear prefilter and a bag hanging down with a hose in it
The bag is to collect water.
The selected media item is not currently available.Barry BEAM #16014
2003 U320 40' AGDS
Beamalarm, Foretravel technical help and specifications
"Whatever the mind can conceive and believe, it can achieve"

Re: Air in my fuel system, engine won't stay running!

Reply #6
Mark
If you have the WINN air/water purge system the inlet/outlet plastic becomes compressed by the sealing "O" rings so that air gets sucked in.
At the top of the see through container is a thumb bolt. Remove the thumb bolt and lift off the inlet fuel hose/adaptor. Then pull up on container and it will come out. Watch carefully for the "O" rings, two on top and two on bottom. The top and bottom "O" rings are the seal sings. The other two "O" rings are spacers to keep see through container from moving up and down. Look carefully at the inlet and outlet and if it is like mine, the diameter where the sealing "O" rings are will be noticeably  smaller. You can replace bowl if you can find one or use "seal all" which is fuel proof. I build short copper tubes which I forced into the inlet and outlet which removed the taper and allowed the "O" rings to seal.
Wyatt
96 U320 40 WTFE, build 4943
84 Toyota Supra towd
2015 Jeep Wrangler towd
Victoria, BC, Canada

Re: Air in my fuel system, engine won't stay running!

Reply #7
Guys thanks for all your help. Barry that pic looks just like mine, thanks....I found 2 problems first the o-ring on top looked bad and second one was a nice pin hole in the fuelline from the filter to the engine!!!! :-[..I am getting ready to take it off and have a new one made......
Mark Self
1997 40' U320
2005 LX7 Suzuki
USPSA-a18138
Ham radio-WM5S
Driving my Daughter Shea to Sporting Clay shoots is my Job!!!!