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SS18 Repower Onan 18HP to Onan 24HP


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#1 Onanparts OFFLINE  

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Posted April 18, 2015 - 03:11 AM

I saved this 1976 SS18 from the scrapman several years ago. Previous owner said the engine was seized up. He wanted it out of his way ASAP and offered to deliver it, of course I said I'll take it!

 

Discovered the starter was stuck. About 10 minutes to cure that issue and it fired up no problem. It had been sitting for a long time so a carb cleaning and basic tune up and it was running smooth. A 48" deck was included with about a dozen new blades. It's a bit long in the tooth as far as looks but has been a solid workhorse the last few years.

 

A restoration is planned and even though the 18HP Onan BG engine runs perfect I have a P224G 24HP engine I'm rebuilding and will swap it in this year to repower it the proper way, at least in my opinion.  :wave:

 

 

Attached Thumbnails

  • SS18A.jpg
  • SS18B.jpg
  • SS18C.jpg
  • SS18D.jpg
  • SS18E.jpg

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#2 jhn9840 ONLINE  

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Posted April 18, 2015 - 03:17 AM

Looking forward to following along on this one. Should be interesting.

jhn9840
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#3 Onanparts OFFLINE  

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Posted April 18, 2015 - 03:31 AM

Looking forward to following along on this one. Should be interesting.

jhn9840
John

It will be a tight fit getting the 24HP big block in there but I have a big hammer, torch, welder and various implements of destruction....:) Production order for the Onan BG pictured.

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  • SS18productionorder.jpg

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#4 1oldbuzz OFFLINE  

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Posted April 18, 2015 - 04:07 AM

Just tried this myself

that 224 is to big

If you stretch the frame 5 inches it will work

another option is to turn the engine so the crank

is parallel to the frame and then feed to a BGB then maybe

good luck with the project



#5 KennyP ONLINE  

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Posted April 18, 2015 - 04:20 AM

I'm going to lurk on this! Never seen a P224.

 

Onanparts, do you have access to a good B48G Service manual? I have one that I found online, but it is not really complete.



#6 jms180 ONLINE  

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Posted April 18, 2015 - 07:31 AM

sounds like a good project. The P224 is a monster engine with power



#7 toppop52 OFFLINE  

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Posted April 18, 2015 - 07:42 AM

If you get it in and working, the only problem will be traction, those things put out enough torque to twist the earth!



#8 larrybl ONLINE  

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Posted April 18, 2015 - 07:48 AM

I'm in to follow this. WooHoo.



#9 glgrumpy ONLINE  

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Posted April 18, 2015 - 07:56 AM

Won't the drive shaft be way big on that engine??  OR, is it just a pulley change then?  Stock belt covers and stays probly won't fit then? Mule drive area?   Have no idea what engine is myself. Question for those using term "BGB" and not sure what that is?? I see it alot on Bolen's postings. 


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#10 KennyP ONLINE  

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Posted April 18, 2015 - 08:21 AM

Won't the drive shaft be way big on that engine??  OR, is it just a pulley change then?  Stock belt covers and stays probly won't fit then? Mule drive area?   Have no idea what engine is myself. Question for those using term "BGB" and not sure what that is?? I see it alot on Bolen's postings. 

BGB is a bevel gear box. No drive shaft on these tractors.


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#11 Onanparts OFFLINE  

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Posted April 18, 2015 - 12:21 PM

Just tried this myself

that 224 is to big

If you stretch the frame 5 inches it will work

another option is to turn the engine so the crank

is parallel to the frame and then feed to a BGB then maybe

good luck with the project

I have a really BIG hammer!

 

I'm going to lurk on this! Never seen a P224.

 

Onanparts, do you have access to a good B48G Service manual? I have one that I found online, but it is not really complete.

What is the manual part number? 965-0767 is the Onan one I have. JD has one, CTM2 that has more detail and good pics. It covers the B43E, B43G, B48G, T260G, P218G and P220G. MTF has or had it in their free download reference library section. Or I can email it to you.

 

The Onan manuals are really geared towards anyone that has been there and done that and just needs a refresh of the old memory bank...:) The JD manual is very detailed and suitable for anyone, first timer or many timer.


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#12 KennyP ONLINE  

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Posted April 18, 2015 - 01:00 PM

I haven't a clue what the manual # is. This is the one we have here. Just not very good but all we have found. Send me both through a PM here. I'll start it, just look up by your screen name at the top right. A red 1 will show shortly.



#13 Onanparts OFFLINE  

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Posted April 18, 2015 - 01:37 PM

I haven't a clue what the manual # is. This is the one we have here. Just not very good but all we have found. Send me both through a PM here. I'll start it, just look up by your screen name at the top right. A red 1 will show shortly.

Done!


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#14 toppop52 OFFLINE  

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Posted April 19, 2015 - 08:19 AM

I love Onans, nothing sounds as good and the torque output is amazing. I know they're expensive and all the other stuff, but I still love 'em!



#15 KennyP ONLINE  

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Posted April 19, 2015 - 08:59 AM

I love Onans, nothing sounds as good and the torque output is amazing. I know they're expensive and all the other stuff, but I still love 'em!

Me too!


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