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Mculloch MT300x Strimmer will not run at full throttle?

Hi,
I have obtained an old, good coniditon2 stroke petrol strimmer.
All parts look functional and in goods condition.
When I start it it runs at slow tick over but as soon at I open the throttle it cuts out.
It sounds like it could be a fuel supply problem and I can see on the carb only an adjustemnt screw for slow running, there is two other what look like like adjusing screws but I am not able to move these.
Can any one help, is it possible to e-mail me an instruction / service manual??
I know this is an old model engine but I would think that McCulloch would have used this design of two stroke engine on many later and possibly current tool systems.

Regards
Bill
Bill, June 2006
the two screws that you can,t move are the adjusting screws for slow running mixture and full throttle mixture settings; to adjust you must free off these screws. they should be marked H andL . once freed off adjust as per previous reply
jimmy

jimmy, June 2006
link Click here to see other fixes for McCulloch MT300x.