Onan 4000 ky no start

Rich Biebel · 10-09-2017, 02:24 PM

Tony.....The rotor is shown as not available on Cummins website.....and sells for over $500....

If the machine was in good condition and not a mess like some I see the cost to replace that rotor and probably a few other items would push the repair cost to at least $750. Assuming it is the rotor and replace the brushes at the same time.....and make sure it is running right and adjusted as well as possible....

At work I use a load bank tester to adjust a machine for best operation.

Those machines have a service life and since they run at 3600 rpm the engine gets worn over time. I shy away from doing any major repairs on one if it looks to be in rough shape....Not worth it.....

I really don't do side work anymore......

10-09-2017, 02:24 PM	#11
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,275 Likes: 25 Liked 510 Times in 200 Posts	Re: Onan 4000 ky no start Tony.....The rotor is shown as not available on Cummins website.....and sells for over $500.... If the machine was in good condition and not a mess like some I see the cost to replace that rotor and probably a few other items would push the repair cost to at least $750. Assuming it is the rotor and replace the brushes at the same time.....and make sure it is running right and adjusted as well as possible.... At work I use a load bank tester to adjust a machine for best operation. Those machines have a service life and since they run at 3600 rpm the engine gets worn over time. I shy away from doing any major repairs on one if it looks to be in rough shape....Not worth it..... I really don't do side work anymore...... __________________ Rich Biebel S/C 1479