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map40's avatar
map40
Explorer
Apr 29, 2016

Onan quality going down????

I have 7 motorhomes currently, 6 with Onan gensets, 3 4KY bought brand new aprox 1 year ago, 2 4KY 2007 with ~1300 hours and 1 2012 5.5K with 500 hours.

I have had motorhome for 15 years, normally they gensets have been pretty good, up until now. In the last 2 years I have had a complete engine failiure (new engine required), 12 fuel pumps, 5 sets of brushes, 4 starters, and 10+ other breakdowns.

You might say "well, they are rental units..." Well, not quite. Of the 3 gensets in the new units, all needed new fuel pumps and 2 needed new starters BEFORE THEY WERE DRIVEN BY ANY RENTER. I believe I have a little more knowledge than the average user, I have taken them apart and I have owned Onan generators with over 6000 hours, so I think I got the maintenance routine down.
Even after that, those 3 new units needed new brushes with less than 700 hours (they all failed between 650 and 720 hours of use).

ANybody experiencing similar issues? I'm sad to say, buy unit number 7 has a Q55 generac with over 3000 hours and I have never had any problems with it.
  • The old 6.5 NH with stator winding starter, saturated field regulation and 1,800 RPM was a great design. Blame outsourcing. The market of pure 100% made in USA products has shrunk to almost nothing. Every company's executives and share holders want to be wealthy - no matter what it takes.
  • I too agree

    My long gone 1987 Motor Home had a very nice Onan 4Kwatt genset with 2 cylinders a pressurized oil system and a spin on oil filter. Our current 2009 Motor Home came with a POS ONAN 4Ky single cylinder splash oil system and two defective fuel pumps within the first two years.

    I for one would be happy to pay additional to receive a higher quality genset
  • I agree entirely. Onan's stink. I would never have one if it did not come with the current unit. A poor performer compared to almost all other brands. Engine and generator

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