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Stationary Engines Discussion Forum

Wisconsin engine

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Author  [Modern View]

07-17-2011 17:07:50

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I have an old Wisconsin engine from a military powerplant. The date is June 67. The model no. is MAENLD. Spec no. is 171633. Size is 3x3 1/4. According to the tag it says 6.95 cont. BHP. Judging by the size of the engine it looks like at least a 14-16 HP engine. Anyone know anything about these engines?

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07-24-2011 09:55:37

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 Re: Wisconsin engine in reply to rustyacresnd, 07-17-2011 17:07:50  
Thanks for the replies. Good info to know. That thing is huge for a 9 hp engine. I have Kohler and Briggs 12 & 16 hp engines that are smaller! This one has all the millitary features, looks the same as new. When the local fire dept. retired it (hardly used) it was put on a water pump that was never used because there was a problem priming it so it just got shoved in the corner.

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07-18-2011 13:39:22

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 Re: Wisconsin engine in reply to rustyacresnd, 07-17-2011 17:07:50  
MAENLD, is a military version of an AENL. It
is a "Heavy Duty" engine, as designated by the Mfr.. The "M" prefex is "Military, "D" suffex is
for heavy duty, and means Stellite valves and
hardened valve seats. Such a configuration is OK
for burning non leaded gas.AENL engines were rated at 9.2 hp at 3600 RPM, though you"ll get
longer life if you don"t run it that fast. An ex Wisconsin Motors employee once told me that 2800 RPM was "Best". Your engine has Timken roller
bearings, and an oil pump.If it hasn"t been
changed, your engine will have a military radio
interference sheilded magneto, shielded metallic
covered spark plug wire, and a special "Military"
sheilded spark plug. If you have magneto,(no spark) problems, standard points, condenser and
coil for a WICO, or, Fairbanks-Morse, magneto
will fit,,,whatever brand yours is. A standard civilian magneto, and plug will fit also, Parts
are readly available, NAPA head gasket is(Fel-Pro) #7686S, complete gasket set is #FS7686S-1
Valves and piston rings are still available from
NAPA auto parts. It should have a Zenith Carb,
#0-12235, 12236, 12375, or 12522, and the NAPA
carb kit # 2-1565 fits all of those numbers.
Get yourself a Wisconsin owners and parts book.
Or search around in and
you can download a free parts book. Wisconsin
motors is still very much in business, and you
can get parts from distributors listed in that
web site, but they seem to think that they"re
gold plated, and are very expensive. If you have
the Wisconsin parts numbers you can find lot of parts on the web, One other thing---oil, the Wis.
owners book lists lots of oil viscositys for
different operating temperating..Jungle to Arctic
I have lots of Wisconsin engines, and use 10-30
in everything, with no problems

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Tramway guy

07-18-2011 11:25:13

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 Re: Wisconsin engine in reply to rustyacresnd, 07-17-2011 17:07:50  
The current engine is rated at 9.2 hp. That is probably at 3600 rpm. Yours might be rated at a lower rpm

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07-18-2011 07:33:27

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 Re: Wisconsin engine in reply to rustyacresnd, 07-17-2011 17:07:50  
There's a bunch of info over at ASECC, but I don't think they specifically show the AENL with the military prefix.

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