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Bought A 318 With A Blown Onan 218


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#1 truckintyler OFFLINE  

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Posted October 14, 2013 - 08:19 PM

Just wondering if I throw a onan from the roper 18t I have into it or I also have a m18 that has low hours..
Onan vs kohler question I guess
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#2 Delmar OFFLINE  

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Posted October 14, 2013 - 09:22 PM

B48M, p218g, dunno which one is which...I think the 218g is in the john deere. I think I got that mod.number right.... hydrastat driveshaft has to work/hookup, if  want to mow electric pto has to bolt on and work too.  there is a guy in Michigan that will rebuild ur motor reasonable price... ship it to him...he ships back.  he rebuilt an onan for me that was in my Case tractor, did a good job.  he sells parts for onan online too.....Gary's Place


Edited by James henry, October 14, 2013 - 09:23 PM.

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#3 Trav1s OFFLINE  

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Posted October 14, 2013 - 09:54 PM

I would be considering a re-power.  Sell the Onans to fund the swap and go from there.  


Edited by Trav1s, October 14, 2013 - 09:54 PM.


#4 Texas Deere and Horse OFFLINE  

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Posted October 14, 2013 - 10:48 PM

The 318 had both of those Onans used in them, the P218 replaced the B43 engine in the production run of Onan engines. JD had to use different drives hafts when they switched from on series engine to the other.


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#5 JDBrian OFFLINE  

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Posted October 15, 2013 - 04:09 AM

Going to a Kohler would mean a lot of things need to change. On the 317 they offered an Onan as a replacement engine for the K17 rod tossing series 1. The kit for the engine swap was extensive with a lot of changes necessary right down to the motor mounting brackets. The engine of choice for re powering older 300 series JD's seems to be the B andS Vanguard V twins. Expensive but very good commercial quality engines.



#6 A.C.T. OFFLINE  

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Posted October 15, 2013 - 08:48 AM

My local John Deere dealer is repowering using Honda engines. Not cheap but will last.


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#7 Trav1s OFFLINE  

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Posted October 15, 2013 - 09:51 AM

http://www.smallengi...e-318-Category/

 

Worth checking out.  I am not suggesting you get the engine from this place. 


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#8 truckintyler OFFLINE  

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Posted October 15, 2013 - 05:15 PM

i can rebuild engines myself, this p218 will be put in the line up.

 was hoping the b43 in the sears works

 whats the pto shaft size 1 7/16" for the 318?



#9 Texas Deere and Horse OFFLINE  

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Posted October 15, 2013 - 05:50 PM

Yes, the PTO is 1 7/16" in the 318.
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#10 truckintyler OFFLINE  

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Posted October 19, 2013 - 10:21 AM

The two buttons on the top of the pump...
One is stuck down
Does the port unscrew easily?

#11 Hammerdown OFFLINE  

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Posted October 22, 2013 - 05:46 AM

Hello truckintyler

Your Money would be best spent in re-building that Onan that came with your 318. Most are Not known to destroy and engine even if they break a Piston connecting rod in most cases it does not destroy the engine or crankshaft. The Roper Sears Onan will have a different Crankshaft diameter than that of the John Deere Onan. To Place a Kohler into your Tractor it would take much changing as PTO & drive shaft coupler as well as wiring and Throttle & choke set up and lastly the muffler is different. To Re-power your tractor all you can get today is Cheap Inferior China Junk. All Mass produced small gas engines are Now Made in China. Kohler, Honda, Briggs & stratton and other's are all Now made in China engine's that do not last as long or even compare to an Onan. All The Part's are still available to refurbish your P-218 through a Cummings diesel-Onan dealership. If it were me I would refreshen that Onan it is a wise Investment that will last a Very Long time if cared for well. I recently placed a new P-218 in my 1983 John Deere 318. It cost me $1475.00 to have it built and I have no regrets. Here is my Tractor that was restored last winter when I Placed the New Onan P-218 in it. Regards, Hammerdown

 

 

 

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#12 truckintyler OFFLINE  

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Posted October 22, 2013 - 06:32 PM

nice deere

 got a b48 from a sears yesterday in great shape, machine shop made me a sleeve spacer to go from 1 1/8 to 1 7/16  keys are in and only took a day to get it, he said $80

 so im going to swap most of what i can from the p218 to the b48, i see the starter is on the other side and another qestion is the eletronic ignition able to swap over? im swapping flywheels also.

 

ive done plenty of engine swaps all metal can be cut and welded , carbs, cables, wiring, and mufflers are easily modified



#13 truckintyler OFFLINE  

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Posted October 24, 2013 - 06:16 PM

Here's the p218
Doesn't look like the rods broke from lack of oil
The journal and rods don't look like briggs do when the blow anyways.
Did find one rod nut off the bolt maybe it loosened up.
Also the starter side clyinder was running hot from caked dirt and oil in the cooling
Also clyinders both have score marks on the top of the bores

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#14 Hammerdown OFFLINE  

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Posted October 25, 2013 - 04:38 AM

Here's the p218
Doesn't look like the rods broke from lack of oil
The journal and rods don't look like briggs do when the blow anyways.
Did find one rod nut off the bolt maybe it loosened up.
Also the starter side clyinder was running hot from caked dirt and oil in the cooling
Also clyinders both have score marks on the top of the bores

 

 

Hello Truckintyler

It looks as though a new connecting rod, some Polishing of that crankshaft's journals and a Good cylinder honing, and that Onan will be back to Good running condition. As I said in a  Previous Post these Onan's are made to be re-built Multiple time's and most time's they do Not destroy the block when they let loose of a Piston connecting rod. Regards, Hammerdown


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#15 truckintyler OFFLINE  

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Posted October 30, 2013 - 06:10 PM

so i transplanted all the external p218 to the b48 i had. timing cover , coil flywheel tins... little bit of cut and well

  

so since the starter is on the other side the b48 starter positive terminal is hitting the frame.... :( so either modify the starter which i dont think is possible or drill a 1" hole so the positive doesnt touch the frame. 

  did the 318 come with the b48? if so how did the starter fit?






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