Author Topic: There be a listeroid 12/2  (Read 527 times)

keith71

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Re: There be a listeroid 12/2
« Reply #15 on: October 31, 2022, 06:14:19 PM »
Thanks 32 coupe. I have pulled one head off and the cylinder looks like it should .the one piston looked about 3/4 the way down in the bore. No scratches, and I think I even see some faint cross hatching in the bore. I will need to be buying valve springs and the retainers for both heads as they have to much rust for my liking on them.                                 

I am going to look at your thread tonite.
« Last Edit: October 31, 2022, 06:59:56 PM by keith71 »
12/2 field marshall.
   Jiangdong R170a
   Kubota D722 7.5k Gen head.

wheelMA1

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Re: There be a listeroid 12/2
« Reply #16 on: October 31, 2022, 07:34:45 PM »
Was this the unit I saw on FB Marketplace in CT?

keith71

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Re: There be a listeroid 12/2
« Reply #17 on: October 31, 2022, 09:50:31 PM »
Yes and what a $hit show it was. They listed it for $100 and they had every idiot in ct offering $2000 or more for it without even seeing it.. Of course these are the guys that never show up. So now owner thinks they hit the lottery..  So i left it alone for a week, then messaged them back and asked if they still had it. They did. I laughed and said I will be there the next morning.
« Last Edit: October 31, 2022, 09:57:12 PM by keith71 »
12/2 field marshall.
   Jiangdong R170a
   Kubota D722 7.5k Gen head.

broncodriver99

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Re: There be a listeroid 12/2
« Reply #18 on: October 31, 2022, 10:57:58 PM »
BB means bushed bearings. CIP means cast iron piston

If it has "ball bearings" it would say TRB for taper roller bearings.

Looks like you found one built likely close to the original lister specs. That's not a bad thing.

broncodriver99

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Re: There be a listeroid 12/2
« Reply #19 on: October 31, 2022, 10:59:44 PM »
So did you get it for the original $100 asking price? Hell of a deal if it is a runner.

keith71

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Re: There be a listeroid 12/2
« Reply #20 on: November 01, 2022, 10:33:17 AM »
I paid more than $100 for it.. This lady was left with a mess. And I was not going to be the one to take advantage of her. I gave her more than enough to surprise her well still getting a decent deal..  As far as a runner, no I could not bring it home and start it up. It needs the top end at minimum taken apart. With the open rocker cover and not much oil in the rocker areas it has some rust. After pulling one head it looks like it could be a runner pretty easily.
12/2 field marshall.
   Jiangdong R170a
   Kubota D722 7.5k Gen head.

dieselgman

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Re: There be a listeroid 12/2
« Reply #21 on: November 02, 2022, 01:17:31 PM »
Very nice find! The original twins of this type are pretty smooth reliable power units. Congrats!

dieselgman
   Thank you dieselgman. That means everything coming from you. Do you carry spares for this engine?
Are 6/1 parts compatible with the 12/2?  Parts  like valves and guides, piston rings , valve spring retainers and springs, and most importantly a starter HANDLE. They actually could not find it.. Thanks.

Hi, we still have substantial parts stocks for these... the majority of the 6/1 parts will service a twin 12/2. We have not dealt directly with the Field Marshall brand, but yours most likely will conform to the Lister designs. No more twin engines remain in our USA stocks, but we do have quite a few singles available here.  dieselgman gsj@gci.net
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keith71

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Re: There be a listeroid 12/2
« Reply #22 on: November 05, 2022, 04:39:18 PM »
Is the little broken piece in the unhappy smilie face going to cause issues running besides loss of some compression?
12/2 field marshall.
   Jiangdong R170a
   Kubota D722 7.5k Gen head.

keith71

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Re: There be a listeroid 12/2
« Reply #23 on: November 05, 2022, 04:43:31 PM »
another pic cleaned up a bit
12/2 field marshall.
   Jiangdong R170a
   Kubota D722 7.5k Gen head.

ajaffa1

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Re: There be a listeroid 12/2
« Reply #24 on: November 05, 2022, 08:49:03 PM »
I don`t think that little chip will cause any problems, provided the piece that broke off has not caused damage to the piston or cylinder bore. The damage may have happened before assembly.
Looks like there are no steel valve seats on this head. If I remember rightly the valves can be lapped until the head of the valves are around 40 thou below the surface of the head. After that steel valve seats need to be fitted. I`m sure 38ac will know the exact limits.

Bob

38ac

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Re: There be a listeroid 12/2
« Reply #25 on: November 05, 2022, 09:14:50 PM »
As Bob said I wouldn't get too worried about that chip causing compression issues. I would worry about cracks from whatever broke it. Inspect it , grind it down smooth and if you want set the bump .001 close on that side.
« Last Edit: November 05, 2022, 09:23:32 PM by 38ac »
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keith71

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Re: There be a listeroid 12/2
« Reply #26 on: November 05, 2022, 09:20:02 PM »
Thanks . This head was off before at some point in it's lifetime. There is some evidence of what looks like silver solder or braze repair on one side of the head. Looks like they were trying to fix some tiny porosity holes. Not sure.   
 I think it was broken then . No marks on the piston or anywhere else. And it definately imo could use new seats. The valves are more like .080  below the head surface. And there is also no valve job there. just one 45 degree angle it looks like.
« Last Edit: November 05, 2022, 09:22:10 PM by keith71 »
12/2 field marshall.
   Jiangdong R170a
   Kubota D722 7.5k Gen head.

38ac

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Re: There be a listeroid 12/2
« Reply #27 on: November 05, 2022, 09:24:19 PM »
I'm not near my spec sheets, I'll post it later
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keith71

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Re: There be a listeroid 12/2
« Reply #28 on: November 06, 2022, 05:23:10 PM »
I think #1 cylinder has been taken apart in the past for whatever reason. #1 head gasket measures 120mm and #2 116mm.  It is the 114mm bore engine so I assume the 116mm gasket is correct. Bores look good. Maybe the 120mm gasket is what was included in the spare parts kit.. 
I also ordered the George B engine CD. Can't wait to get that.

« Last Edit: November 06, 2022, 05:25:03 PM by keith71 »
12/2 field marshall.
   Jiangdong R170a
   Kubota D722 7.5k Gen head.

cujet

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Re: There be a listeroid 12/2
« Reply #29 on: November 06, 2022, 07:15:42 PM »
Don't get too wrapped around the axle with regard to valve depth. If needed, just grind the valves and seats to fit. Adjust the bump clearance to achieve the proper compression ratio. No biggie.   
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