What 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.
What to do if O.S. engine fails to fire because it is flooded?
If the O.S. engine fails to fire due to being 'flooded' from excessive priming, fully close the needle-valve and remove the glowplug. Then, flip the propeller to pump out the excess fuel. If possible, invert the engine while pumping out the excess fuel.
Why does O.S. engine fire intermittently but not run?
If the O.S. engine fires intermittently but does not run, it could be due to a mismatch between the glow plug and the fuel. Consider changing either the fuel or the glowplug to resolve this issue.
How to fix O.S. engine that fails to fire because of burned out glowplug?
If the O.S. engine fails to fire, and you suspect the glowplug element is burned out, replace the glowplug. Ensure that the applied voltage is not excessively high to prevent future burnouts.
What to do if O.S. engine fails to fire and the glowplug battery is discharged?
If the O.S. engine fails to fire, and you suspect the glowplug battery is discharged, recharge the lead-acid cell or replace the dry battery. Keep in mind that an unused or almost unused dry battery may sometimes be of insufficient capacity if it is 'old stock'.
Why does O.S. engine fire once or twice, then fail to fire?
If the O.S. engine fires once or twice, then fails to fire, re-check and readjust the voltage, referring to the 'BEFORE' section.
What to do if O.S. engine fails to fire because of insufficient priming?
If the O.S. engine fails to fire due to insufficient priming, repeat the priming procedure as described in section 7 Priming.
What to do if O.S. engine fails to fire because of something wrong with battery leads?
If the O.S. engine fails to fire, check the glowplug heating using other leads to identify any issues with the battery leads.
How to fix sluggish rotation of O.S. engine?
If the O.S. engine exhibits sluggish rotation, recharge the electric starter battery.
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.
General| Brand | O.S. engine |
|---|---|
| Model | FS-40S |
| Category | Engine |
| Language | English |
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