[AT] another Cub engine question

[Carl Gogol]

Allis Chalmers also had engines that were used in tractors and also power
units for combines, carnival rides Etc.
The D-14 engine variant core engine for industrial use only has one part
change, the governor spring.  I don't remember the RPM difference exactly
but it seems like the industrial version was 500 - 700 RPM more.
Carl, Manlius, NY

-----Original Message-----
From: AT <at-bounces at lists.antique-tractor.com> On Behalf Of Greg Hass
Sent: Tuesday, July 7, 2020 1:31 PM
To: at at lists.antique-tractor.com
Subject: [AT] another Cub engine question

I have a "49" Cub and for 33 years we used an IH 64 combine with a Cub power
unit. I always wondered how the power unit could run that combine.  Several
years after we no longer had the combine I bought my Cub; well, it always
sounded different than the power unit. A while later I came across the
manual for the power unit and while looking through it I saw it was listed
as running at 2900 RPM as opposed  to
1800 RPM for the Cub which explains the power difference.  My question is
this; I talked to a guy a couple of towns over that dealt with only old IH
equipment. He seemed very up to date on Cubs and he claimed that because of
the higher RPM's the Cub power unit had a balanced crankshaft as opposed to
a standard crankshaft in a Cub tractor. Since then I have always wondered if
that is true and if someone on this list has the answer.
          Greg Hass
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