Servo Assembly Test
Disconnect ball chain from throttle linkage. Separate servo to amplifier connection, then connect an ohmmeter between the orange and grey wire leads at servo connector. A resistance of approximately 85 ohms should be obtained. Connect ohmmeter between orange and white wire leads. A resistance of approximately 85 ohms should be obtained. Start engine, with servo disconnected from amplifier, connect orange lead of servo to battery positive terminal. Connect white lead of servo to ground, and momentarily touch grey lead of servo to ground. Servo throttle actuator should tighten bead chain and open throttle. Throttle should hold in that position or slowly release tension on chain. When white wire is removed from ground, servo should release bead chain tension immediately. Replace servo if it fails any of the above tests.