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Wisconsin Engines Single cylinder up to V4 engines.

Wisconsin Engines

Wisconsin BKN - sparkplug location difference


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  #1  
Old 06-05-2016, 10:59:32 PM
oldiron1 oldiron1 is offline
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Default Wisconsin BKN - sparkplug location difference

Hi Guys, I have two garden tractors that I'm trying to date, both have Wisconsin BKN engines however neither one has a tag anymore unfortunately. One difference between the two that I noticed is one sparkplug installs vertically in the top of the head while the other is on a 45 degree angle. Any idea when that change occured?

Thanks, Rob

---------- Post added at 09:59:32 PM ---------- Previous post was at 09:11:14 PM ----------

I just noticed now one more difference; the engine that has the spark plug on a 45 degree angle, the exhaust port comes directly on the side, perpendicular with the crank shaft; not on an angel like the other engine. Otherwise the engines look similar; square gas tanks with the same bracket, magneto and oil bath air cleaner which look the same. Maybe they're not both BKN's?
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Old 06-06-2016, 06:45:04 PM
Zira Zira is offline
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Default Re: Wisconsin BKN - sparkplug location difference

The angled one is an ABN or AKN (or earlier AA, AB, or AK). so older than the BKN (or ACN) on the other one.
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Old 06-07-2016, 12:30:03 AM
oldiron1 oldiron1 is offline
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Default Re: Wisconsin BKN - sparkplug location difference

Thanks! What's strange to me is this engine is 1 little more than an inch longer than the AK and ABN engines I have on other tractors. The flywheel is exposed behind the shroud similar to the BKN? On my other Page tractor.
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