To Next PageTo Next PageWhat to do if O.S. engine starts but revolutions decrease and engine eventually stops?
If the O.S. engine starts but the revolutions decrease, and it eventually stops, ensure the fuel tank is filled. Also, inspect the fuel tubing for any kinks or splits. Finally, verify that the carburetor is not clogged with dirt.
Why does O.S. engine start then revolutions increase and engine cuts out?
If the O.S. engine starts and then revolutions increase until it cuts out, it might be due to a mixture that is too rich. Try closing the needle-valve a little to adjust the mixture.
General| Brand | O.S. engine |
|---|---|
| Model | FS-40S |
| Category | Engine |
| Language | English |
Covers events that might involve serious or fatal injury due to misuse or neglect.
Covers less obvious dangers that could cause damage or injury under certain circumstances.
Lists essential tools, accessories, fuel, glowplug, and propeller needed before operating the engine.
Procedure for installing the glowplug correctly into the cylinder head.
Steps for securely installing the propeller, including the use of a locknut set.
Instructions for filling the fuel tank, including fuel line connection and filter usage.
Ensuring the model is held securely by an assistant to prevent movement during engine starting.
Setting the throttle to the correct opening position before applying the starter.
Connecting the battery leads to heat the glowplug before starting the engine.
Initial needle-valve adjustment by listening to exhaust sound pitch changes.
Fine-tuning the needle-valve setting through small adjustments and observing RPM changes.
Summary of the practical optimum needle-valve setting, including lean and rich positions.
Simplified procedure for restarting the engine after the initial optimum setting has been established.
Procedure for safely stopping the engine by closing the throttle and adjusting linkage.
Simple running-in procedure for new engines to allow parts to settle under operating conditions.
Identifies the four essential conditions for quick and reliable engine starting.
