Simon,

The three adjustments are the high-speed needle valve, the air-bleed adjustment, and the idle stop screw.

Start out with the high-speed needle about 2-1/2 turns out from closed.

The idle stop screw is the one that points straight up. Adjust it so that the throttle barrel is about 2-3mm open when the throttle is closed to idle.

The air-bleed screw is the small one with a spring that's positioned horizontally. Adjust it so that screw blocks the hole in the front of the carburetor to about one-half.

If you still have running problems, the engine may have other difficulties.

We hope you find this information helpful. Should you have any further questions or concerns, please do not hesitate to contact us at this email address. (Please be sure to copy all previous emails into any future questions.)

DID YOU KNOW that our web pages now all contain FAQs? (Frequently asked questions) Please drop by and take a look! We hope you'll find the information helpful and valuable to you.

Sincerely,

Bill Baxter, Manager
Hobby Services
1610 Interstate Dr.
Champaign, IL 61822
USA

Phone: 217 398-0007
Fax: 217 398-7721
Email: [email protected]
Web: http://www.bestrc.com