Originally Posted by Jim G
I was reading a letter in Motorhome Magazine from a guy who's Onan Generator seized up after only a few hours. When he checked the dipstick, there was no oil in the crankcase. Having bought my rig new, and the generator only having a few hours on it, I never even thought to check the oil. So after reading the article I checked my oil and it was barely touching the dipstick ! It is had to believe that Onan could let generators get out of the factory with insufficient oil in them, but anyone buying a new RV would be well advised to check it before running the generator.
You just inspired me to carefully read my Onan manual (3600 model on my Solera 25S= 3.6KY)) and hopefully you checked the oil when unit was fairly level and oil was cool? I read that this unit takes 1.5L which equals 1.6 qrts, or roughly
50.7 ozs if my math is correct. Using an accurate measure (or calibrated beaker) I would let it rip until about at the 48 oz. mark, wait a few minutes so that the oil has settled down into the sump, unscrew the dipstick, wipe, then slowly insert ALL the way(screw it in too until the o-ring makes contact!), wait a few secs, retrieve, and then make note of the crosshatched
area, of course. If not touched yet then add no more than another 1 oz., let settle, wipe stick and re-measure. If you can get the oil level in between the hi-and-lo area on this crosshatched area then you should be very close. If you can get it a little higher such as 2/3 of the way up on this crosshatch then I would say you are ideal
. NEVER run when overfilled as you will throw
this oil out the crank and lose oil, plus make a heckuva mess...too low and you will cause severe Onan damage. You know the drill! Check it often.
Also, make sure you don't have a leak near the drain plug area. I run Mobil 1 in mine, usually 5W-30 for the temp ranges I operate in. Read the book as it's all there.
Hopefully you are able to stabilize the problem and have no more! Cheers...PB