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Old Girl 1978 Roper


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#541 Onanparts OFFLINE  

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Posted April 15, 2015 - 12:52 PM

Thanks for the Oil shroud gasket! Yes mine was missing and not listed in the parts manual.

You're welcome! It is listed in the book under the old part number of 122-0347. New number is a 122-0502. Description is "Seal, Air-Oil Filter. Very important as is prevents the cooling air escaping from around the filter to tin cover gap. If it's missing and you put your hand near the filter you can feel a lot of air coming out that is not cooling the cylinder on that side!

 

The cut out area needs to be at the "bottom" when installing.


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#542 KennyP ONLINE  

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Posted April 15, 2015 - 01:17 PM

You're welcome! It is listed in the book under the old part number of 122-0347. New number is a 122-0502. Description is "Seal, Air-Oil Filter. Very important as is prevents the cooling air escaping from around the filter to tin cover gap. If it's missing and you put your hand near the filter you can feel a lot of air coming out that is not cooling the cylinder on that side!

 

The cut out area needs to be at the "bottom" when installing.

Was this used on any other engines. I have a B43, B48G, and a P220, all with oil filters.



#543 Onanparts OFFLINE  

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Posted April 15, 2015 - 01:48 PM

Was this used on any other engines. I have a B43, B48G, and a P220, all with oil filters.

Yup! I just updated the description of it.

 

122-0502 Oil Filter to Shroud Gasket.
B, P & N Series.

If your Onan Opposed Twin has an oil filter this is the seal/gasket that keeps the cooling air from escaping out around the filter and tin cover gap.

122-0502 Supersedes/Replaces 122-0347.

JD #HE122-0347 & HE122-0502. Case/Ingersoll #C20577


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#544 larrybl ONLINE  

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Posted April 15, 2015 - 08:16 PM

I found a "local" company that will build a custom exhaust for Old Girl for around $350.00. I priced a 155-1686 muffler at lawnmowerpros that "might" be modified to fit and they want $407.95. I will be giving the company the go-ahead to build the muffler tomorrow. They will want me to bring the block in later for measurements prior to final welding of the flanges. I placed the block on the frame to take and print pictures of the measurements to the battery tray and hood for them. I am holding off on installing any other engine components as I barely got the block in without removing the hood. Once the engine is done I'll have to remove the hood and front grille and have help lifting the engine back on the frame. Oh, the copper washers came in and the timing cover is installed. It is tricky to get the governor lined up with the nylon bushing. I did tip the block foreword to make sure I felt resistance from the governor. I think it is good to go. Looks like a slight holding pattern till I get the muffler worked out.

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#545 Onanparts OFFLINE  

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Posted April 15, 2015 - 08:40 PM

Larry, I found a place that has the Raygun style mufflers, # 6 in your manual pic. Part number 155-1698. They show 30+ in stock. I'll have a cost in the morning and if the price is not crazy you can deal with them direct if interested. They are OEM direct fit mufflers.


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#546 larrybl ONLINE  

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Posted April 15, 2015 - 09:02 PM

Would I also need Items 9 and 10 154-2113 and 154-2112?

 

A internet search I did came up at http://www.lawnmower...asp?id=155-1698 Price: $382.95 I assume this is (ea).



#547 mrmr56 OFFLINE  

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Posted April 15, 2015 - 10:36 PM

Larry, go to robertsonstorquetubes.com and click on pipes and then click racing mowers. They have a pipe kit that might help you out.


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#548 larrybl ONLINE  

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Posted April 16, 2015 - 08:05 AM

Onanparts, I would be interested in what you find. I'll check back perodically as I am at work right now. Larry.



#549 larrybl ONLINE  

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Posted April 16, 2015 - 08:30 AM

Larry, go to robertsonstorquetubes.com and click on pipes and then click racing mowers. They have a pipe kit that might help you out.

Thanks mrmr56, I looked over their site and didn't see anything that would work for me. Most I could do would be to order a set of bent tubes, then have them modified, still would need the muffler(s).



#550 larrybl ONLINE  

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Posted April 16, 2015 - 11:15 AM

The company is called CRAFTMASTERS Laser & Fabrication. I spoke with Robert just now (they are 3 minuets from my work office) and committed to the muffler build. I droped off the pitcures I took last night with the measurements to the battery tray and hood grill. He wants me to bring the block in tomorrow so the exaust ports can be measured. He will 3D model and blueprint the exaust and then I could approve the design for fabrication.. I told him about the site I was posting the build on, and asked him if someone else would want one of these mufflers if he could build more. He said yes, he would have the blue print on file and could duplicate these. Kinda excited on how this will turn out!


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#551 Onanparts OFFLINE  

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Posted April 16, 2015 - 01:14 PM

Onanparts, I would be interested in what you find. I'll check back perodically as I am at work right now. Larry.

They are almost as proud! $260.00 Ea. Ouch! That's for the 155-1698. I did find some Onan one piece mufflers, 2 pipes into 1. See # 19 in attached pic. They are RH, right hand outlet. Just under $300.00 and I'm ordering one up for my...SS18 Onan to Onan Repower Project. :) I'll start a new thread on that, swapping out the 18HP BG engine for a P224G.

I might have to relocate the outlet to the center but that's not too difficult. The pic is from the P224G parts book. Same block as the N52M. Since you green lighted the fab shop I assume you are not interested in one of these? I'll have mine in hand tomorrow or Monday and post some pics.

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#552 mrmr56 OFFLINE  

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Posted April 16, 2015 - 01:45 PM

Larry, are you talking about the powder coating place on South Loop Drive? I had heard that they had gotten into some the fabrication business but I haven't had a need for such lately.
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#553 larrybl ONLINE  

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Posted April 16, 2015 - 03:47 PM

Onan Parts, Yea I committed to the muffler build, Thanks for the research though. This way will include everything from the block flanges, pipe, and muffler, the exaust will be vented from the side of the muffler. mrmr56, yep that's the place, they have a shop there dedicated to race car parts fab. 


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#554 larrybl ONLINE  

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Posted April 16, 2015 - 08:41 PM

Trying to stay true to doing at least one thing on Old Girl in the evenings. Plug wires are made. :smilewink:

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#555 Onanparts OFFLINE  

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Posted April 17, 2015 - 12:35 PM

New muffler showed up this morning. :) I also found a couple of these on ebay with the heat shield. New old stock with some surface rust etc. but the price was good. $116.00 shipping incl. Note these are only for the Big Block Onan twins, N52M, P224G etc. Does not fit the 16-20HP Onan's.

 

http://www.ebay.com/...=item20fa06caa4

 

I don't know the seller and never purchased anything from them before.

 

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