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Old 04-26-2010, 03:01 PM   #1
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base setting for lst2

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can anyone tell me the base setting for the idle screw on lst2 with 427.
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Old 04-26-2010, 04:16 PM   #2
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Here's the setup guide that should have came with the truck:

If that is the correct one, which I believe it is, the settings are as follows:

HSN: 4 turns out from bottom.
LSN: 2 turns out from bottom.
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Old 04-26-2010, 10:51 PM   #3
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Base setting for LST2 idle screw

There really is no "setting" per say. There is typically supposed to be a 1mm gap opening the carb, along with the LSN and HSN setting listed above.

To see this gap, you can remove the air filter. Becareful, and make sure you have no dirt and debris around the air filter elbow before you take it off, you don't want to get any dirt in the carb. Actually make sure the whole filter assembly has little to no dirt on it when you remove it, the chances of getting dirt down the carb are fairly high.

If you prefer not to take off the air filter. Use the LSN and HSN settings listed and try to start the engine, while using a bit of throttle. Once started, slowly release the throttle, if it stalls out, turn the idle screw in as required (maybe a 1/4 or 1/2 turn at a time), until it stays running, but does not engage the clutch. Conversely if the engine is racing ... turn the idle screw out a bit to drop the idle.
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