[AL]

Have a 15 KW Wrico Kubota powered Gen set in mine. Mine will run form 15 minutes to a couple hours, loses electricty and after sitting will shut down from overheat. If you radiator is remote and fans to cool might be an issue. Electric drops and no fan. I’m fixing to pull mine as it won’t slide out far enough to access regulator. That’s what Wrico thinks it could be. I can’t find a soul in Central Texas to pull mine. Good luck.

[Jim/Chris]

Marshall,

Try running generator without rubber hose between air filter and turbo. Caused from internal ply separation. This could explain shut down time levels.

2nd ….check inside electric control black box for loose electric

connections.

AL

[cal]

Thanks…..I’ll take a look.

[Archived]

If your fuel lines are old they maybe drawing air in from cracks or Collapsing under suction, I had this problem. Changed all fuel lines solved the issue.

[Rocky And Tonya]

Thanks!

[FRED & JUDY]

How does it die? A fuel supply problem would sound different (RPMs dropping, sputtering) than an electrical/commanded shutdown.

If it is a commanded shutdown, take a close look at your sensor wires. Look for chafing, intermittent breaks etc.

If all else fails, most of the more advanced vehicle diagnostic systems have oscilloscope/logging functions. You’d hook several oscilloscope channels to the sensor inputs you cannot take out of the loop such as AC-present, over-speed, temp and go for a ride. The log would show you what the sensors are telling the controller when it shuts down.

[Tim]

Well….decided to go old school and change the fuel filters first. I shook out the old filters and found what looks like pipe dope or some thread sealant. Fair amount of it.

My generator has a raycor as the first stage and a regular fuel filters as the second stage. Second stage was clean. Changed them both and fired up the ginny and it ran for two hours straight before I shut it off.

I have a few legs of 2-5 hour driving coming up…….Betting my issue all along was fuel.

Lesson Learned: Generators need two things to run……fuel and air. Always make sure both are present when chasing issues.

[Archived]

So the shop that changed fuel filters 6 months prior was the source of your problem ?

I don’t know how many posts over the years have started out with FILTERS have been just changed or are new. After hours of trouble shooting, have gone back to the last filter service.

My only guess is this tape was improperly installed.

Do you have any idea how or why thread tape was used on a filter change ?

Even Jon would agree with me (yup) thread tape has no business around filter replacement.

AL

[Archived]

Al,

I try to do much of my own work and changed the filters at the last filter change, so I know there was no tape or sealant used with my last install. This filter ran exactly 70 hours before clogging up. It has run most of the day today without incident, so I feel like I’m out of the woods. I have a full day of driving in a few weeks to get from Colorado back to Tennessee, so I wanted to make sure I have generator for the leg home (to keep the wifie cool).

I did find (after researching filters) that I believe I have the incorrect first stage filter installed. The first filter in the generator fuel system is 6 micron, and the second filter (only two filters in my system) is a 10 micron. That explains why the second filter was clean when I changed them yesterday. Thinking I need at least a 10 micron and probably a 30 micron as the first filter.

I’m still trying to find replacements. Think I have it narrowed down. Luckly, I’m parked next to a 2006 Royale for the next few days. My neighbor’s coach is within a few serial number of mine. I’ll see what he is running.

Thanks for your input.

[AL]

Even if your primary was a 6 micron the fact it plugged in 70 hours appears to be an indication the coach fuel system has dirt or debris or maybe algae in it and the chassis filters could be on their way to plugging.

[Steve]

Agreed! It’s worrisome for sure.

[Archived]

Marshall,

NAPA has filters in many choices of microns. They can cross reference any brand that you have now.

AL

[Ronald]

Had a similar problem. Replaced everything ($$$) including the control board. Gen would run sitting still for hours. When driving it might run the whole trip or shut down shortly into the trip. Finally in SLC it wouldn’t run for more than a few minutes while traveling and would sometimes shut down after running for some time sitting still. Went to the local Koehler dealer. After about a minute of diagnosis he reached in and put just a little pressure on the fuel line which kinked and the gen sputtered and shut down immediately. What was going on was the line was old like the earlier post noted. When traveling if we got bouncing a little the line would bounce, kink and shut down the gen. After a while the line would kink sitting still when the gen compartment heated up. $75 later and a new fuel line and no problems since. yes I felt dumb for missing the most simple cause. Another Prevost lesson learned by experience and $$$.