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Chain saw carb. adjustment

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Joined: 08 May 2005
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PostPosted: Thu Sep 06, 2007 6:01 pm    Post subject: Chain saw carb. adjustment Reply to specific post Reply with quote

I have a small Homelite chain that started running poorly. I thought, well the carb has gotten out of
adjustment. I went to adjust it and there was plastic cover over the needles and could only move very little. I took it apart and got them off so I could adjust. That wasn't the problem. It was the muffler was stopped up with carbon. Any way, why in the world is that plastic over the needle adjustments?
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Joined: 17 Aug 2007
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PostPosted: Thu Sep 06, 2007 10:31 pm    Post subject: Re: Chain saw carb. adjustment Reply to specific post Reply with quote

They"re limiter caps. Designed to keep the average user (the ones who have no idea what they are doing) from fiddling with the carb adjustments too much, making it too rich and causing excessive emissions, or burning up the engine from being too lean. They allow a small amount of adjustment to compensate for minor differences in engines, and fuel mixes.

If you take it to a mechanic to repair, he can remove them, do what he has to, and then is supposed to re-install them, or install new ones if they had to be destroyed to get them off. I"m sure many don"t bother. I know many of my 2 cycle engines no longer have them.
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