THE TACHOMETER - RPM COUNTER

The importance and necessity of a tachometer as an instrument of Service equipment cannot be stressed too emphatically - in reality it's the modest assistant that puts the final OK on a job of engine tune-up, repair or installation.

It tells you in the test room whether or not the engine (motor) with appropriate test wheel installed, is measuring up to the performance characteristics established for it - by counting the RPM under full throttle running conditions. Should it fall short, it's back to the bench for further diagnosis and corrective steps.

It tells you on boat installation whether or not the propeller selected is correct for the purpose - again by simply counting RPM at full throttle position for maximum performance. And again, should it fall short or over rev. it tells you which way to go on the propeller - down pitch or up, assuming the installation to be proper.

It's all a matter of RPM known by tac. count. It's futile, wasted effort to attempt finalizing carburetor needle adjustments and/or tune-up unless tachometer indicated RPM falls within the factory recommended operating range for top performance. In either the tank or when boat installed, the tachometer is your key to best performance and owner satisfaction. You can't afford being without it.

The Tachometer shown here is of durable construction and easy to use - follow the manufacture directions.

Write to the following for further details, price and delivery.

FOX VALLEY INSTRUMENT CO.,
Cheboygan, Michigan

JOHNSON MOTORS

Jack Penland
Service Promotion Manager