OK I could not resist sorry, I bought that tach in 1964 and it was made by OS you can see the name on the handle.

Yes back to Danks question: You are correct it is likely not needed at all and I say likely simply because I think we are talking about a typical two stroke. If that is the case I much prefer to teach the fellows to start learning just by ear and with a two stroke things are much more obvious than a four stroke -read easyier.

I teach everyone (with two strokes) to pinch tune on the high end but for now you are better off going by the factory recommendation and nope don,t need a tach.

That afro comb by OS I pictured is of course mainly for fun now freaking the boys out but like GB I also have an old analog by ace the is comprable to his TNC and these are remarkably accurate. When I was active in pylon a good tack is a must simply because even tho I still tuned to a pinch it is usefull for making decisions on props and changes to the engine itself.

I also have one of them red Glo Bee tachs that Tower sells and it works fine, Heck the red color matchs the red 18v battery under my starter It does not get as much use as I only really use it some times when their has been a climate change on my four strokes. Fortunately no one ever convinced me four strokes were some sort of a upgrade so got a whole bunch more of them peskey two strokes.

John