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Old 06-28-2015, 12:24 AM   #11
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OK finally have the fix. New fuel pump was what ultimately corrected the problems. There were a few days spent chasing if in the fuel lines, but tht was a simple loose fitting. Thinking it was a fuel issue they replaced the fuel filter. Which Onan won't cover under warranty, oh well..
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Old 06-28-2015, 07:01 AM   #12
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Late to the discussion here but I've hit the issue with the 36 error code on my two week old Cummins/Onan 5500. Really, it was the first time I used it for more than just a few minutes when it was demonstrated during the PDI.

After priming, it started right up... I let it idle for maybe 5 mins before starting to apply any load. Then, using the recommended sequence, I added the load in increments. All was good for about 20-30 mins when I heard the gen set stumble and stall. Now I can't get the darn thing to start although it cranks just fine.

Using troubleshooting guides I've found on the Cummins/Onan site, I've checked the oil level (it's close to full and right between the hashed marks as suggested), fuel level reads about 7/8 on the gauge but I know it's gotta be close to full, checked the spark plug wires to make sure they're snug, and checked the fuel lines for any shut-off valves (haven't found one). Also checked the air cleaner and it looks brand new, as you would expect.

After much reading, it would appear that the fuel pump is the most likely issue... at least that seems to be the problem most folks with this code had. I guess my next step is to find a Cummins/Onan dealer in the area.

Any tips or guidance from you guys that have had to bring yours in for warranty support?
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Old 06-28-2015, 05:01 PM   #13
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I never got an error code, so I cannot be of much use there.
So far my dealings with them have been fairly painless.
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Old 06-28-2015, 05:04 PM   #14
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Call the dealer asap for an appoinment, is about my only advise.
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Old 06-28-2015, 05:14 PM   #15
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Thanks Carl
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Old 07-08-2015, 09:50 AM   #16
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I have an issue that my generator works fine when parked, but shuts off in under a mile of travel. Yes, the gas tank is full. Last night I checked and filled connections with dielectric grease and overfilled the oil by 4 oz or so. I took a quick trip around the block and it didn't shut off. I'm hoping this is the fix. Only time and the next trip will tell.
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Old 07-08-2015, 10:06 AM   #17
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I would imagine the dealer can handle your generator issues under warranty. No?
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Old 07-08-2015, 10:22 AM   #18
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Usually oil level.
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Old 07-08-2015, 12:08 PM   #19
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Quote:
Originally Posted by Jopopsy View Post
I would imagine the dealer can handle your generator issues under warranty. No?
I am my own warranty station at this point.
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Old 07-12-2015, 12:22 PM   #20
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On fuel issues and especially in areas where stale fuel can sit, I would Highly recommend Sea Foam. Great product and resolves many fuel issues.

Obviously, it won't fix a rubbed wire or a bad fuel pump, but you can certainly rule out old or poor fuel.

Google for reviews on Sea Foam. I have no association with the company or the product other than being a very satisfied user.
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