O.S. engine MAX-10LA - User Manual

Questions and Answers

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Anna CareyAug 2, 2025
What to do if O.S. engine fails to fire?
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  Caitlyn MooreAug 2, 2025
  If your O.S. engine fails to fire, several issues could be the cause. First, the glowplug battery might be discharged; in this case, you should recharge the lead-acid cell or replace the dry battery. Second, the glowplug element may be burned out, requiring you to replace the glowplug and ensure the applied voltage isn't too high. Third, there might be a problem with the battery leads; try checking the glowplug heating using other leads. Finally, the engine could be flooded due to excessive priming. To resolve this, fully close the needle-valve, remove the glowplug, and flip the propeller to pump out excess fuel, inverting the engine if possible.
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Amy OlsonAug 6, 2025
Why does O.S. Engine start but revolutions decrease and engine eventually stops?
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  Natalie HerreraAug 7, 2025
  If your O.S. Engine starts, but the revolutions decrease and it eventually stops, it could be due to a few reasons. One possibility is that fuel isn't reaching the engine. Ensure the tank is filled with fuel and check the fuel tubing for any kinks or splits. Also, verify that the carburetor isn't clogged with dirt. Another cause might be that the mixture is too rich. In this case, close the needle-valve half a turn (180 degrees), wait for several minutes, and then restart the engine, priming is not necessary.
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Victor MurphyAug 12, 2025
What to do if O.S. Engine fires intermittently but does not run?
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  amycarrollAug 12, 2025
  If your O.S. Engine fires intermittently but doesn't run, the mixture may be too rich. Try closing the needle-valve a little to lean out the mixture.
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lopezkatieAug 17, 2025
What to do if O.S. Engine fires once or twice, then fails to fire?
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  Paul NelsonAug 17, 2025
  If your O.S. Engine fires once or twice, then fails to fire, continue flipping the propeller. If the engine doesn't start after more than 10 flips, disconnect the battery from the glowplug and leave it for a few minutes. Then, re-energize the plug and flip the prop again. If the engine still doesn't start, remove the glowplug and pump out excess fuel by flipping the prop quickly.
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Aaron Knight DVMAug 21, 2025
How to fix insufficient priming of O.S. Engine?
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  Marie Austin MDAug 21, 2025
  To address insufficient priming in your O.S. Engine, repeat the priming procedure referring to section 8 Priming.
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hlynnAug 27, 2025
How to fix sluggish rotation of O.S. Engine?
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  Gerald EvansAug 27, 2025
  To address sluggish rotation in your O.S. Engine, recharge the electric starter battery.