Join Date: Apr 2006
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It would be easy enough to add a rev counter to the propshaft on a boat. Epoxy on one small neodymium magnet and a dummy counterweight, put a digital counter and a reed switch up next to the shaft, $30-60 and there you go, a rev counter if you can't find one off the shelf.
Actually there are plans on the web to use a simple calculator as a counter that way too. Make it $10 that way.
And...I'm still not inclined to do it, sorry Boasun. "Too Much Stuff!"