Rebuilding an Onan motor.
Has anyone here ever rebuild an Onan motor? It's a 16 hp performer series. I'm running out of things to fix, so I would like to try to rebuild a garden tractor. It really doesn't need a rebuild it's running 113 and 115 compression, good enough, but a little low. I've been told that it's not worth doing that finding parts will be almost impossible. That I was better off doing a Honda or B&S repower. But I want to do a rebuild. Where are a good source of parts?
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Parts aren't all that expensive. I overhauled an onan opposed cyl. engine on a welder last summer for about $125.00. Rod caps go on at an angle. First rods that I've ever seen like that. 0 -
Onan engines were bad to get a carbon build-up in the cylinders. Is it making a knocking sound?
You may want to pull the heads and see how much carbon is on top of the pistons and the heads. Clean that off and check the compression again. May not need a complete overhaul. Let us know what you find.
It's been a long time since I worked on one so take this with a grain of salt.
Thanks---Peabo0 -
If it has carbon build up, there is this stuff, I can't remember the name, it's for car engines, you spray it into the engine, in each spark plug hole, let it seat over night and then start and rev the engine and it suppose to break the carbon up and clean it out. Question is can't I just use that? It's not knocking or anything. It still has good power, I puller a 5000 pound boat, it smoked more than usual but it pulled okay. 0 -
My dad and me rebuilt his sears suburban garden tractor, we replaced the old 16 with a onan, I found him some chevon tires off an atv, by god its a real tractor now, Bigger engine, bigger tires, got love the power 0 -
quote:Originally posted by Kimbercolt
My dad and me rebuilt his sears suburban garden tractor, we replaced the old 16 with a onan, I found him some chevon tires off an atv, by god its a real tractor now, Bigger engine, bigger tires, got love the power
The Sears suburban tractors were powerful little tractors in thier day. They also have a fan base with collectors and a website. Don0 -
quote:Originally posted by Cutiegirlracing
If it has carbon build up, there is this stuff, I can't remember the name, it's for car engines, you spray it into the engine, in each spark plug hole, let it seat over night and then start and rev the engine and it suppose to break the carbon up and clean it out. Question is can't I just use that? It's not knocking or anything. It still has good power, I puller a 5000 pound boat, it smoked more than usual but it pulled okay.
you can use "Seafoam" on it. I hear that stuff is VERY good for doing a top-end cleaning of engines. In my truck, I just let the whole bottle suck in through the PCV vaccum hose. Turn the truck off for 15 minutes and then start it back up. You should see all the smoke!0 -
Wouldn't carbon build up in my engine cause a higher compression reading due to the smaller air space in the cylinders? You guys that have done the rebuilds, where did you get your parts? 0 -
quote:Originally posted by dcon12
quote:Originally posted by Kimbercolt
My dad and me rebuilt his sears suburban garden tractor, we replaced the old 16 with a onan, I found him some chevon tires off an atv, by god its a real tractor now, Bigger engine, bigger tires, got love the power
The Sears suburban tractors were powerful little tractors in thier day. They also have a fan base with collectors and a website. Don
I had one that I restore and sold a few years back. I was a smaller one with a 8 horse B&S. I'll have to try to find some pix of it. There is a very good fan base for the Sears though.0 -
There are Onan dealer networks out there. You can also go to your local John Deere lawn & garden dealer. The JD 316 tractor was a big seller, equipped with a 16hp Onan. The JD 318 is still to this day, one of the all-time greatest sellers for JD.
If you decide to do anything to it, which if it's not broke....don't fix it until it is, be sure to copy all of the info from the data plate on the engine and take it with you. If you go to an original OEM dealer for the brand of tractor, take the tractor serial number with you as well. Your parts person will love you for it.[:D]
What brand and model tractor is it??0 -
Cummins/Onan will sell you all the parts you could need, all at a premium price. Look around and you'll find some other sources. Very common engine, lots out there. Good solid reliable, well made.
Onan sells some stuff goes by the name of 4C that is designed to clean out the carbon. Just follow the directions on the can, good stuff.
Have been in a lot of them, nothing odd or unusual about them.0 -
Are Kohler and Onan the same?I rebuilt a 12 HP Kohler a few years ago and parts were pretty expensive.If I remember correctly I paid about a 100 dollars for a piston and rod. 0 -
The Aux gen set in my camper makes cranking noises but doesnt seem to rotate the engine.
It's an NHM, essentially sealed in a box that prevents you from seeing
much. I suspect an RV shop sabotaged it.
Any hints on getting at the starter without dropping the whole MG set?
I googled Onan and found lots of parts plus some listed on Ebay.0
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