TR-1 Gladiator Tach Connections

This Chart is a Guide Only and is to help you with your TR-1 Gladiator Tachometer connections and should not be used as factual information. Please check your specific motors manual for verification of the wire colors to make these connections on your motor.

Connection to a Cummins Diesel 540 may require a “Magnetic Tach Pickup,” Cummins part number 3078155, available for order from a dealer.

For Yanmar 6 cylinder – Model #6LPAM tach signal can be located in the bell housing. Find the terminals with the Orange and Black wires. The Orange wire is (+) signal, and the Black wire is (-) ground.

Mercury (not applicable to Verados)
+ Gray(positive)
- Black(negative)
On Optimax motors: if your reading is incorrect and fluctuates up and down you must change the tach output to analog by taking the cowling off the motor, finding the 3 gray wires under the alternator (2 will be connected together), unplug those two and moving the plug from one wire to the open connector on the 3rd wire.

Yamaha
+ Green(positive)
- Black(negative)
Must be taken from the bullet plug (one will be open on each wire) in the cable bundle approx. 4-6 inches from the tach gauge itself.

Honda
+ Gray(positive)
- Black(negative)
Must set pulses per revolution to 2 (Use Setup Code 267)

Suzuki
+ Yellow(positive)
- Black(negative)

OMC E-Tech
+ Gray (positive)
- Black (negative)

I/O's Gasoline
If you know for sure it is an analog tach signal
-Can take right from the pulse or signal post off the tach gauge
If you know for sure it is digital tach signal
-Take from the pulse or signal post on the alternator -Use any engine ground OTHER than the alternator ground
If no post on the alternator to get signal from
-Take signal directly off coil, use negative side. -Use any engine ground. -May require an RC filter available from TR-1

I/O's Diesel
If you know for sure it is an analog tach signal
-Can take from the pulse or signal post off the tach gauge
If digital tach signal
-Take from the pulse or signal post on the alternator- Use any engine ground OTHER than the alternator ground
If no post on the alternator to get signal from - You will have to use the wires from the tooth counter, (this will vary in color per motor).