While you wait for answers, we may have found some information which could help you.
Click here for Strimmer Fuel MixHow to fix Challenge Extreme Grass Trimmer 350W Product number SRT 350B?
what is the sparkplug gap setting?
Where can I buy a primer build for a challenge extreme lawnmower xss40a?
Where can i buy a primer bulb for a challenge xtreme petrol trimmer?
where can i purchase a spool & line complete ?
Spring for Prop Shaft in a 250W Grass Trimmer?