For auction is a vintage Go Power mechanical tachometer from a small engine dyno. It has a 1:1 input that uses an 1/8th inch square drive coupler fitting. It has scuffs and scratches on the case from many years of use but in general its in pretty nice shape. The fluorescent red/orange paint on the needle is still very bright and has not been bleached out by the sun. Case diameter is 3". I have never calibrated it but I used to tune Briggs & Stratton engines with it so it definitely works.

These are pretty rare these days.

Note:
Shipping to confirmed addresses only