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OS LA 46 Problem

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Old 08-29-2010, 01:59 AM
  #1
ahash04
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Default OS LA 46 Problem

Need help on engine. Cant tune my engine properly. I start the engine it gives good RPM for about 30 sec then starts dying down but doesnt quit and on pinching dont reach to the RPM as quickly as should be. Fuel line are ok and fuel flows OK...Help...
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Old 08-29-2010, 12:42 PM
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Default RE: OS LA 46 Problem

Too rich.

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Old 08-29-2010, 01:01 PM
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Default RE: OS LA 46 Problem

Hate to say this but the LA's have always had problematic carbs. Try upgrading to to an FX.
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Old 08-29-2010, 04:57 PM
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XmanB
 
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Default RE: OS LA 46 Problem

Try resetting the needle back to where it should be by screwing it in until it stops and backing it out 1 1/2 turns. Start the engine and tune it until it is a steady 2-stoke pitch. Use small changes and wait a few seconds between adjustments. Once it is leaned out at max rpm, back off 2-3 clicks (richer).

Throttle down to idle for about 10-20 sec then throttle up to full. If the engine goes immediately back to full without hesitating or stopping then you are finished.

If it hesitates then increases to full, stop the engine and turn the air bleed screw in (clockwise) about 1/8 turn. Restart the engine and repeat until the throttle goes from idle to full with no (or minimal) hesitation.

If the engine dies immediately when you throttle to full, open the air bleed screw about 1/2 turn and try again.

All of this is explained in the manual.


http://manuals.hobbico.com/osm/40-46-65la-manual.pdf

Good luck
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Old 08-29-2010, 09:06 PM
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Default RE: OS LA 46 Problem


Quote:
ORIGINAL: GuitarPlayer

Hate to say this but the LA's have always had problematic carbs. Try upgrading to to an FX.
Nah, the LA's run just great... but they are "different".

You need to learn how to deal with them. Once dialed in, they are reliable engines.

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