
Do you have a question about the Stihl MS 390 and is the answer not in the manual?
| Engine Displacement | 64.1 cc |
|---|---|
| Chain Pitch | 3/8" |
| Weight | 6.2 kg |
| Guide Bar Lengths | 40 to 50 cm |
| Fuel Capacity | 0.68 l (23.0 oz) |
Technical specifications for the engine, including displacement, bore, and power.
Engine specifications specific to the USA market, including displacement in cubic inches.
Specifications for the ignition system, including air gap and spark plug details.
Specifications for the chain lubrication system, including oil delivery rate.
Troubleshooting for clutch, chain drive, brake, and tensioner issues.
Procedures for removing, inspecting, and cleaning the clutch drum and chain sprocket.
Procedures for removing and installing the spiked bumper.
Details on removing the clutch, including spark plug removal and locking strip use.
Procedure to check the proper functioning and responsiveness of the chain brake.
Step-by-step guide for removing and installing the chain brake components.
Instructions on how to remove various pivot pins from the housing.
Procedures for removing, cleaning, and installing the muffler and spark arresting screen.
Steps to prepare the engine and components for leakage testing.
Procedure for performing a pressure test on the engine crankcase.
Procedure for performing a vacuum test on the engine crankcase.
Procedures for removing and installing the cylinder, including piston and crankshaft handling.
Information on the ignition module and its function in timing control.
Details on fixed ignition timing and its lack of mechanical wear adjustment.
Step-by-step instructions for removing and installing the ignition module.
Instructions for removing and installing the vehicle's wiring harness.
General information and troubleshooting tips for the starter rope and mechanism.
Instructions for removing and installing the pawl in the rope rotor.
Procedures for removing and installing the rope rotor, including reliving spring tension.
Step-by-step guide for properly tensioning the rewind spring for the starter rope.
Procedures for removing and installing the front handle components.
Instructions for removing and installing annular buffers between handles.
Steps for installing annular buffers between the front handle and engine housing.
Steps for removing and cleaning the pickup body and suction hose for oil supply.
Instructions for removing and installing the oil pump assembly.
Step-by-step guide for removing and installing the oil pump.
Procedures for cleaning and removing the air filter and prefilter for maintenance.
Step-by-step guide for removing and installing the carburetor assembly.
Instructions for removing, inspecting, and replacing the metering diaphragm and gasket.
Steps for removing and installing the pump diaphragm and gasket.
Guide for adjusting the carburetor's high and low speed screws for optimal performance.
Procedures for checking and replacing the tank vent on machines manufactured up to 2002.
Instructions for cleaning and replacing the pickup body (filter) in the fuel tank.
Procedures for removing and installing the fuel suction hose and its flange.
Steps for removing and installing the engine housing, which is integrated with the fuel tank.