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Wisconsin Engine Question


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#16 Bruce Dorsi OFFLINE  

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Posted November 23, 2011 - 08:26 AM

Indeed the oversizes read 0.005", 0.010", 0.020", 0.030". The manual says any other makings after the serial number on the block indicates "special machining" and to include it when ordering parts. If i can figure out this damn scanner i'll post the manual


Was that true for all Wisconsin engines, or just older models?

According to the Wisconsin Parts Manual for the TR10 and TRA10 engines, oversizes were only .010", .020", and .030".

Link to Wisconsin Parts Manuals: Wisconsin Motors | Wisconsin Part Catalog Files

#17 Bolens 1000 ONLINE  

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Posted November 23, 2011 - 08:26 AM

You mean I got it right? Wow! Wild guess, there! I hadn't a clue they would do something like that.


Yeah you got it right LOL :D

On the rings, could you use a .010 set and grind the rings for proper end gap to fit?


Thats probably what I'll end up doing

#18 Bolens 1000 ONLINE  

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Posted November 23, 2011 - 05:37 PM

Another strange thing I found is the connecting rod is a bit shorter than the others I have seen.
Its a standard size rod, but its just shorter :confuse:

This just keeps getting stranger by the day...

#19 smasher OFFLINE  

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Posted November 23, 2011 - 08:06 PM

The manual i have is a engine shop manual covering from 3hp-53hp with maching specs not a parts manual per se . As far as the connecting rod i know wisconsin change there horsepowers (ie TR-10D has a shorter con rod and is acually only 8hp and the tra-10D is a true 10hp with the longer con rod) this brings me to believe some used the con rod out of a TR-10D in your engine. Is it àbout a 1/4" shorter?

#20 mikebramel OFFLINE  

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Posted November 23, 2011 - 09:50 PM

If the piston comes up to flush with the deck the rod is the right one

#21 Bolens 1000 ONLINE  

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Posted November 23, 2011 - 10:02 PM

The manual i have is a engine shop manual covering from 3hp-53hp with maching specs not a parts manual per se . As far as the connecting rod i know wisconsin change there horsepowers (ie TR-10D has a shorter con rod and is acually only 8hp and the tra-10D is a true 10hp with the longer con rod) this brings me to believe some used the con rod out of a TR-10D in your engine. Is it àbout a 1/4" shorter?


I believe the Rods are interchangeable from the TR-10D To the TRA 10D

The newer DA-83 style rods will work on S-8D,TR-10D, TRA-10D
The DA-80 and DA82 rods are also interchangeable

The rod that came out of this engine is a DA77 which I have not seen used on the 8-10 hp models before.

#22 Bruce Dorsi OFFLINE  

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Posted November 24, 2011 - 09:55 AM

The rod that came out of this engine is a DA77 which I have not seen used on the 8-10 hp models before.


The DA-77-S1 connecting rod was used on TRA10D & TRA12D engines, and was replaced by the DA-83-S1 conn rod.
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#23 Bolens 1000 ONLINE  

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Posted November 24, 2011 - 10:12 AM

Must have been an older style rod.
I have seen DA73's used on them as well (with the old sheet metal oil dipper)

#24 sacsr OFFLINE  

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Posted June 27, 2012 - 08:24 PM

Guys was searching and came accross this thread by accident. When I pulled the top on my S12D.....my piston too have the "1/2 " mark stamped on the top of the piston......so this motor was rebuilt at some point?? or was it resized at the factory because of an imperfection??

#25 Texas Deere and Horse OFFLINE  

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Posted June 27, 2012 - 08:40 PM

Scot, If I remember right, these guy came up with the Wis. factory had to re-bore the block to clean it up when it was first bored to size. If you check, you will find the piston .005 over-sized.
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