On Mar 19, 2:59 pm, "Roger Long" wrote:
"Brian Whatcott" wrote
These days, non-contact or optical tachometers are cheap
http://h1070530.hobbyshopnow.com/products/description.asp?prod=HAN156

Thanks for the good link to what I was suggesting to someone else for
verifying their tach. ...

That would be me, I think. Very cool at that price. I'm not sure how
I'd get it to work on my saildrive though.

-- Tom.