User Manual

LOSI 8IGHT/8IGHT-T RTR • INSTRUCTION MANUAL

Possible Cause Solution

ENGINE DOES NOT START

Out of fuel Reﬁll the tank and follow starting instructions

Engine ﬂooded Review Glow Plug Test

Air ﬁlter is clogged Check and replace if necessary

Fuel is old or bad Use new fuel

Glow plug is not working Review Glow Plug Test

Throttle servo failed/Setup is wrong Check servo operation. Set it to neutral and reset the linkage according

to your radio and model manufacturer’s speciﬁcations

Carburetor is incorrectly adjusted Return the carburetor to the factory settings and retune if necessary

Piston and cylinder is worn Check the piston and cylinder for wear or damage and replace if necessary

ENGINE STARTS THEN STALLS

Out of fuel Reﬁll the tank and follow starting instructions

Air ﬁlter is clogged Check and replace if necessary

Engine may be overheated Let the engine cool. Richen the high speed needle

Engine idle is too low Follow the instructions to increase idle speed

Carburetor is incorrectly adjusted Return the carburetor to the factory settings and retune if necessary

Clutch is slipping or locked-up Check the clutch for worn/broken shoe or spring. Also check clutch

bearings and ensure free rotation

Fuel is old or bad Use new fuel

ENGINE IS RUNNING, BUT VEHICLE DOES NOT MOVE

Brakes are stuck Look for damage or foreign matter locking the brakes

Drivetrain is damaged Check for damaged driveshaft or diff. Replace as needed

Receiver battery capacity is low Charge the receiver battery

Radio is not responding despite charged battery Make sure binding is properly set up

Throttle servo is improperly set up Set the servo to neutral and reset the linkage according to radio and model

manufacturer’s speciﬁcations

Drivetrain is not functioning properly Check the drivetrain for smooth operation/damage

ERRATIC CONTROL

Transmitter and/or receiver batteries are weak Install new batteries in the transmitter. Recharge the receiver battery

Connectors are inserted improperly Check the connectors and reinstall if necessary

Brake is not working Check the servo, brakes, and linkage for damage. Repair/replace/reset

the servo linkage to factory settings

The throttle channel was reversed after calibration Rebind and calibrate

The steering channel was reversed after calibration Rebind and calibrate

Troubleshooting Guide

Turning Off the Vehicle

1. Remove the vehicle body.

2. Using a Losi

tuning screwdriver (LOSA99167), pinch the fuel line.

3. Power off the receiver.

4. Power off the transmitter.

WARNING: Do not touch the exhaust, as it can become extremely hot

during use.

OFF