2005 Class A motorhome Generator stops running

[timnjulie]

Recently purchased 2005 Damon Astoria M-3679 with 2005 7.5 kW Generac diesel generator. Serviced by RV shop. It has been working fine, but after a recent weekend trip it shuts down after 6 minutes. I have started it numerous times and it stops running almost exactly after 6 minutes, with or without load on generator. I have only used it for A/C traveling recently. Starts and runs great, for 6 minutes. It will start again after short wait. Not sure if it's a fuel pump. temperature switch, any suggestions?

[keithl]

If you’re fuel level is to low it will do that as a feature to keep you from running it empty 

[manholt]

Agree!  25% fuel, no generator!  Could also be a bad oil level sensor, if your tank is more than 25% full.

[timnjulie]

Thank you! I made sure fuel was at 1/2 tank,  so it wasn't a low fuel condition.  

[dickandlois]

Tim, Does the generator set any Error Codes ?

How many hrs. are on the meter?

What is the coolant Level?

Rich.

[timnjulie]

I'm not sure how to access error codes.  I will check the hours but they are low. I'll double check the coolant level but the generator was recently serviced. Thank you 

 

[jleamont]

31 minutes ago, Timnjulie said:

I'm not sure how to access error codes.  I will check the hours but they are low. I'll double check the coolant level but the generator was recently serviced. Thank you 

 

The on/off switch will blink a code as soon as the generator stalls out. Count the flashes and there should be a pause between the sequences. 

[timnjulie]

Thanks I appreciate the info., I'll check it tonight.

[rayin]

Coolant level and  temperature may also shut off the engine. The  temperature sensor is time-consuming to replace. As Jleamont said, check error codes first.

[timnjulie]

Thanks I'll check those out. 

[timnjulie]

The meter has 825 hrs.  The coolant was a little low. Topped it off but it still shuts down almost after 6 minutes every time. 

[jleamont]

2 hours ago, Timnjulie said:

The meter has 825 hrs.  The coolant was a little low. Topped it off but it still shuts down almost after 6 minutes every time. 

Were you able to count the flash’s on the switch light?

[timnjulie]

I was waiting and it didn't flash. 

[kaypsmith]

Have you contacted Generac support, my last MH with a Generac generator, I used them several times and found pretty good support.

24/7/365 CUSTOMER SUPPORTUnited States & Canada: 888-GENERAC (888-436-3722)

[timnjulie]

I have called the generac 800 number on the generator and couldn't find anyone to talk with.

[kaypsmith]

Do you have a voltage meter for AC, Generac has also a safety feature that looks at the output voltage of their generators, if voltage goes outside of normal operating range, normally 108 to 130 volts, the unit will auto shutdown.

[timnjulie]

I do have a voltage meter, I'll give it a CHECK, THANKS.

[timnjulie]

Turns out I was low on coolant.  I put in 1/3rd of gallon, rv center said all they did was add 1 pint of coolant and now it works fine. Seems odd I was just 1 pint old, but hey it works fine now. 

[hermanmullins]

Tim,

Happy it worked out well and at little expense.

Herman

[kaypsmith]

14 hours ago, Timnjulie said:

Turns out I was low on coolant.  I put in 1/3rd of gallon, rv center said all they did was add 1 pint of coolant and now it works fine. Seems odd I was just 1 pint old, but hey it works fine now. 

I just went through this same problem earlier this summer, mine had a pinhole in the radiator that got progressively worse, so be sure to keep a close eye on the coolant.

[timnjulie]

Thank you! Got out cheap that time. 

[rayin]

You have one final task, investigate why coolant was low, and correct the cause. My  Onan 7.5 has never required additional coolant, well, at least since 2013 when we purchased this MH.

[timnjulie]

I will check further, thank you