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Unidentified Engines

Unknown Wisconsin single cylinder


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Old 11-09-2018, 10:24:54 AM
A9lewis A9lewis is offline
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Default Unknown Wisconsin single cylinder

Help me identify the engine I came across. It is a very large single cylinder Wisconsin engine with an attached hand clutch on the output side. I am told it was purchased at auction in the 1950's and used on a farm grain elevator. It has a 3 1/2 inch bore and 4 inch stroke. No tag but the four screws indicate it was a large tag. The head is aluminum casting AB102A. It uses a hand crank. Has oil bath air cleaner, zenith carb, wico magneto. It had been sitting in a barn probably a decade or more. It turned freely by the exhaust valve was stuck big time. 18 mm sparkplug but threads stripped out. I have been able to resurrect it and get it running. Don't know what to do with it though.


If you can give me the model number, year, and horsepower I would greatly appreciated it.

Al
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Old 11-09-2018, 10:30:59 AM
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Default Re: Unknown Wisconsin single cylinder

Sounds like you have an AHH model.
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Old 11-09-2018, 10:54:47 AM
Pat Barrett Pat Barrett is offline
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Default Re: Unknown Wisconsin single cylinder

I think? the AHH is 3-5/8" bore, It may be the one just smaller in bore than the AHH
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Old 11-09-2018, 11:00:41 AM
radiodoc radiodoc is offline
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Default Re: Unknown Wisconsin single cylinder

The Wisconsin AHH uses part number AB82 for the head. I think the AB102A is on a AGN or AGND. I'm sure if I am wrong someone will correct me on this. Allie
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Old 11-09-2018, 11:50:07 AM
K-Tron K-Tron is offline
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Default Re: Unknown Wisconsin single cylinder

The AHH has a 3-5/8" bore, the AGH has 3-1/2" bore. However the engine that A9lewis is describing is an AGND. The AGND is a 12.5hp engine at 3200rpm. It first came out around 1957-1958. I believe it is the finest single cylinder engine Wisconsin made. It will run day in and day out under full load without missing a beat. With a Twin Disc over center clutch you have a pretty desirable engine. The AGND's were used on all sorts of industrial machinery for ~25 years.

Chris
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Old 11-09-2018, 01:00:58 PM
A9lewis A9lewis is offline
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Default Re: Unknown Wisconsin single cylinder

Thanks. I need to visit with the guy whose family had the longest. I was thinking it must have been made in the 40's.
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Old 11-09-2018, 02:36:12 PM
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Default Re: Unknown Wisconsin single cylinder

Yep, you guys are right about the AHH bore. I think my mind is slipping.
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Old 11-10-2018, 10:00:32 AM
A9lewis A9lewis is offline
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Default Re: Unknown Wisconsin single cylinder

The exhaust valve spring in this engine was a compound wound spring. Close wound at the top and loose wound at the bottom. I thought it was collapsed but it had sufficient pressure to work. I saw pictures of springs like it. Anyone know if this is the correct spring and why would they design something like that?
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