Test of Rebuilt Onan B43G 18HP on Homebuilt Stand

A slideshow of pics followed by the first two tests of the flat 2 cylinder Onan engine my dad rebuilt this summer. The engine is from a John Deere 318 garden tractor.

Category:

Autos & Vehicles

Tags:

• Onan
• B43G
• small
• engine
• John
• Deere

[4dairyairs]

that is a good sounding engine I have a pre 78 sears with the same engine but it needs a new carb. What is this engine off of? 5 stars

[VespineVid2]

Thanks, it is from a 1985 John Deere 318.

[Sgtgym]

Hi, Great job!

I am looking for a straight crankshaft for a P218g Performer. It was a tapered crankshaft. Is it possible to change it to a straight shaft crank?

Do you know where I might find one?

Also looking for the rear plate and bearing with shims for end play adjustment.

I got the Onan off a welder at the scrap yard and some how the person who owned it before broke the shaft OFF at the rear plate and that also was broken during the incident!

Thanks

Jim

[VespineVid2]

A good source for Onan parts is Onanpartsdotcom. They have mostly new, and some used parts available. Tulsaenginewarehousedotcom has Onan crank diagrams on their web site. Ebay is another good source for Onan parts.

Many can be found under John Deere 318 since thousands of these tractors were built with Onans. Other Ebay searches such as Onan parts, Onan P218, etc. also produce good results. Good luck with your project, these are fine engines that when properly rebuilt will last for years.

[Trainmasterkreks]

WOW nice job so he rebuilt that engine during the summer by himself?

[VespineVid2]

Yep.

[shartne]

@jenniferheisecarver Thank you for your information. I also wondered is the cut off diode necessary to run it with just a key switch. I think that part is still on the craftsman. we may have to find it.

[jenniferheisecarver]

@shartne Ignition wire is position #4 on the four pin plug.

That would be the lower left as you have it oriented in your

video.

[shartne]

Running very smooth I just uploaded a video of the 20 hp Onan we put on a Case 446 Lawn tractor. Could you tell me from looking at the ignition plug on my video which wires on the plug in are the ignition switch wire?

[Hunterc1525]

These motors always have that little wine to them when they run I love it

[mondo78]

Have an 18 horse Vanguard in my 314, my Dads 317 has the original 17 horse Kohler both twin cylinders and good engines. However, you can't beat the sound of an Onan 18 horse. Sweet.

[alan19861]

hi do u have a diagram on how u wired the starter switch ect....

[jenniferheisecarver]

@EdVoigt1 What model Onan do you have? Do you want the wiring diagram for just the engine, or are you looking for some sort of interface with a machine of some sort, like a tractor or welder?

[EdVoigt1]

I'm looking for a wiring diagram for my onan, could you help me find one?

[dragata1]

ima cry it sound so beautiful