BAC Forum

General Boards => Technical Support => Topic started by: David Lynch on May 26, 2013, 04:21:25 PM

Title: onan 7.5 quiet diesel wont stsrt
Post by: David Lynch on May 26, 2013, 04:21:25 PM

My onan 7.5 ran yesterday for ~30 minutes just fine.  Started her up this morning had a hard time starting and then ran real rough.  now it won't start at all.  seems to be starving for diesel but don't know.  any suggestions on what to check???  

Title: Re: onan 7.5 quiet diesel wont stsrt
Post by: Keith Oliver on May 26, 2013, 04:22:23 PM

fuel filter ready for a change?

Title: Re: onan 7.5 quiet diesel wont stsrt
Post by: David Lynch on May 26, 2013, 04:38:06 PM

Maybe   Have not serviced it yet.  Last full service 4/26/12.

Title: Re: onan 7.5 quiet diesel wont stsrt
Post by: Steve Huber on May 26, 2013, 04:54:44 PM

Keith's suggestion of fuel filter is probably correct. Do you have at least a 1/4 tank of fuel in main tank?
Steve

Title: Re: onan 7.5 quiet diesel wont stsrt
Post by: Edward Buker on May 26, 2013, 10:38:04 PM

Air cleaner check for nests or some form of blockage, that will give you the same symptom. Possibly fuel pump is not working.

Later Ed

Title: Re: onan 7.5 quiet diesel wont stsrt
Post by: David Lynch on May 28, 2013, 02:11:02 AM

Will do a fuel filter tomorrow

Title: Re: onan 7.5 quiet diesel wont stsrt
Post by: Roland DuBree on August 21, 2013, 10:05:27 PM

Mine will not start either.  My problem is low 12 VDC power supply to generator - like 8 volts instead of 12.  Been told need 12 volts. Suspect bad terminal connections but cannot find all terminal point locations to check for bad points. Check your supply voltage. Suspect generator needs a steady 12 VDC supply to keep it running and if to low it just shuts down.

Title: Re: onan 7.5 quiet diesel wont stsrt
Post by: David Lynch on August 22, 2013, 04:38:59 PM

Had the set serviced and the electrinc fuel pump was bad.  $300.00 later runs fune.