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weedwhacker style carbs...

To: shop-talk@autox.team.net
Subject: weedwhacker style carbs...
From: Mark Andy <mark@sccaprepared.com>
Date: Tue, 9 Aug 2005 14:11:49 -0400 (EDT)
Howdy,

I have a small scooter powered by a 49cc 2 stroke, presumably weedwhacker 
based, motor.

Since new, its required choke to start if it was at all cold, along with 
having a slight hesitation/die when you give it throttle off idle, before 
it catches again (assuming its warm) and accelerates.

Nowadays, after a year of neglect, it starts pretty hard (like 20 pulls on 
full choke) and once its running doesn't like to go off choke very soon at 
all and when I rev it enough that it doesn't immediately die, it'll idle 
ok and run at speed ok, but the hesitation on initial throttle application 
is really bad, to the point where its likely to stall.

I'm planning on changing the fuel & plug, but I was curious if anyone had 
any carb tuning advice for me.  My butt says that if this were a "normal" 
motorcycle carb, the needle position or perhaps the mixture screw would 
need to be richened up.  However, its been about a million years since I 
didled with motorcycle carbs and I've got no clue at all what adjustments 
the carb on this chinese wonder might have...

Any pointers appreciated!

Mark






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