That's funny, I was thinking the same thing the other day. I know Autometer tachs can read 8,6, and 4 cylinders (you cut certain wires for each combination).
Perhaps lift a tach off a three cylinder tractor? :lol:
Or, use one for a four cylinder and plan on it reading 25% fast? Of course, then you could make everyone think the 3 cyl can turn some rpms. :lol:
__________________
|