Step 1: Troubleshooting
Before working on the outboard motor, check the hull, rigging, installation of outboard motor, fuel level, and wire connections. For mechanical troubleshooting, refer to relevant troubleshooting section in this chapter. For checking and servicing outboard motor, refer to service procedures described in this manual to perform the work safely.
Step 2: 2. Power Unit
Trouble 1 Engine will not start or is a little hard to start. (Recoil starter operates normally.)
• Inspection of Ignition System, Fuel System and Compression Pressure
• When testing, put electrode cap assuredly to prevent direct contact with spark tester wiring and leak of electrical current.
• Keep flammable gas, fuel and oil away from tester to prevent them from catching sparks.
Trouble 2 Engine starts but stalls soon.
• Inspection of Fuel System, Ignition System, Compression Pressure.
Fuel System
Ignition System
• When testing, put electrode cap assuredly to prevent direct contact with spark tester wiring and leak of electrical current.
• Keep flammable gas, fuel and oil away from tester to prevent them from catching sparks.
Compression Pressure
Trouble 3 Idle engine speed will not stabilize.
• Inspection of Intake Manifold, Air Intake System and Ignition System
Trouble 4 Rough acceleration.
Rapid opening of throttle causes engine to stall.
Acceleration is not smooth.
• Inspection of Carburetor, Ignition System and Compression Pressure
Trouble 5 Gear shifting cannot be made normally.
