2007 Ford E350-V10 PC-2350 - After 2 Years Stored In Climate-Controlled Garage

Quote from: donc13 on October 18, 2023, 08:14:24 am

Ron,
I added a similar cut off valve a few years ago.  Before I put my 2551 in storage, I shut the valve off and run the Onan until it uses up the gas in the carburetor and leave it shut during storage.  When I come out of storage, I just open the valve, prime the carb (about 20 secs) and I am good to go.

Works well for me.

Hi Don.  Did you mount the fuel cut-off right there next to the carburetor?  Or did you mount it below, before the fuel filter and pump?  It is naturally safer to mount it below in case of a fuel leak, but is more susceptible to corrosion and surely an inconvenient location.

Ron,
I put it in the rubber fuel line just below the carb.

Motion Pro 12-0035 1/4" Inline Fuel Valve
 https://a.co/d/gPLkBRz

Just got back from a 2 night excursion in our PC, catching up on forums.

Thanks guys for confirming that it is safe to add a fuel cut-off at the carb.

I hope to get back to doctoring our generator during the next week or two.  Winter is approaching.  It would be nice to put the rig away in good working order, and with an empty carb this time.  In preparation for this fall color get-away at Starved Rock SP, I replaced a finicky black tank waste valve and a weak macerator.  I seem to be going through macerators every 8 years.  This new one is my 3rd.

Just curious, Ron,  which macerator did you go with ?     I'm beginning to see similar behavour with mine.

Just curious, Ron,  which macerator did you go with ?     I'm beginning to see similar behavour with mine.

I bought THIS ONE on eBay for $52 with free shipping which arrived in very good time.  It fit without modification except for the inlet which I swapped, and of coarse the wiring connections.

Just a quick closure on this.

About my generator.  I simply ran out of time to address its poor operation, so as I had done a few times last month, I again drained the carb, then filled it's bowl with Seafoam.  Maybe during winter storage, the extended soaking will do some good.  This matter will have to wait until spring.

I replaced my 2nd macerator with a 3rd one in-time for one last get-away, and all is well.  I am going through macerators every 8 years.

I replaced my black waste tank valve with a new one.  It turned out that my original valve was fine.  The upstream seal for it had become slightly deformed, creating excessive resistance during the last 1/4" of travel.  All I needed was one new seal, but it is all new now, so I got some spare parts.

My 5-Star Tune was loaded this season.  I appreciate the change to the transmission behaviors during acceleration, but because I have not yet gone on a trip towing our Jeep Liberty, a final evaluation will have to wait.  I hope things improve with regards to being on cruise control and climbing free-way over-passes.  The crazy 2 to 3 gear down-shifting always bothered me.  I am hoping the 5-Star tune will address that.  Fuel economy is surely not compromised with the 5-Star Tune.  I wonder if it actually improved, but since I rarely drive our PC without towing the Jeep, I can't say for sure.  Another factor is that we are now being very disciplined cruising in the 63mph to 64mph speed (5mph slower) so that is another influence.  Not towing, we seem to be averaging between 11.5 and 12.5mpg on Illinois/Wisconsin flat roads via the ScanGauge-II.  One cross country 4 week trip towing the Jeep with many fuel purchases over ~5000 miles, will provide a realistic number to post.

Good info there Ron.    I sent for and received the macerator you suggested, and will install next spring.    Our's  has a gray tank valve issue and will first check the gasket for deformities
before replacing the whole valve.

Good info there Ron.    I sent for and received the macerator you suggested, and will install next spring.    Our's  has a gray tank valve issue and will first check the gasket for deformities
before replacing the whole valve.

I had the same issue after a slightly longer than normal winter.  Removing carb bowl and cleaning our ethanol jelly solved the issue.  Now I drain the carb when winterizing.  I think I will also install a fuel shut-off so I can start the motor occasionally without filling the carb back up again.

I had the same issue after a slightly longer than normal winter.  Removing carb bowl and cleaning out ethanol jelly solved the issue.

Thanks GregB,
In the spring, I will try that first.

I'm pretty sick of my Onan generator. It hasn't really worked in five years. I've done all the fixes I can find, watched all the YouTube videos, readjusted the oil level to a more perfect level, cleaned the carburetor, changed out the carburetor, soaked in seafoam and more. I've worked on it. A neighbor who specializes in working on generators has worked on it. I usually have to drop it for a while after messing with it and then forget where I was when I start back again. Sometimes it runs. It's just rough. The best it's sounded was when I got the oil pressure right. Why does one practically have to be a full time mechanic to keep one of these things going?  Even when it runs, it's not smooth and it's loud.

Isn't there a better option for these MHs? After all these years? I've been struggling with the same Onan generator model and its problems for the last nearly 20 years and two different PCs. Although I have to admit this last one has been far worse. And I haven't really messed with it in over two years. I just want a new generator that works. Any suggestions?

Cd.   What’s yours doing?   Mine would run rough, run for anywhere from 20 mins to five hours and die. Constantly fouling the plugs.  I blamed it on my carb too.  Changed it etc. Then I hooked up a gravity feed right to the carb with the supply sitting a couple feet above the gen.  Ran it for hours. Ran smooth, no more fouling the plugs .

I installed a new fuel pump (located it outside of the compartment).  It’s been perfect ever since.
I also installed a power cut off switch to the fuel pump so I can run it dry after use.  I know many place a fuel cut off on the fuel line itself.  I did not choose that route due to known failures in those plastic cut off valves, either leaking by or leaking externally.

No idea if this is your issue or not but for a couple of bucks in fuel line and some gas to gravity feed you can find out.   I placed a bolt in the fuel line going to the gen to stop any fuel pumping when running the test.

Also, I installed an aftermarket fuel pump for about $30 and bought a second for back up.  Having mounted it just outside the case where the fuel line goes in allows me to change it out in about 10 minutes or less should it ever fail.