AboutJohn C. Bridgers Sr. Expertise Small Engine Service Center Co-Owner - ATVs, Mowers, Trimmers, Snow throwers, and Many Other Small Engine Operated Equipment. I can answer questions pertaining to Most Lawn and Garden Equipment, e.g. riders, tillers, trimmers, cement mixers, chainsaws, etc. I have been repairing small engines for 34 years. Briggs & Stratton, Tecumseh, Kohler, Lawn Boy, Stihl, Poulan, Mac, and Honda; to name a few.
Experience
Past/Present clients I have worked on small air/water cooled engines for 34 Years. I performed warranty work for Lowes of Wilson and other retailers in the area. I Own a Yard Maintenance and Certified Small Engine Repair Service Center.
Question Hi From Wales Uk.
I have a McCulloch Airstream IV Blower vac with a 21cc two stroke.
Do you know the screw settings for the carb High screw, low Screw and the choke flap stop screw as I have no idea and it won't start or run properly. Everthing has been cleaned and new plug etc..........but someone has messed with these screw settings?
Thanks Adrian
Answer Hello Adrian:
Turn Both H and L Screws Clockwise Until Seated. **DO NOT JAM SNUG ONLY** Now Turn Both Counter Clockwise 1 1/2 Turns. Holding the Throttle Full Open, Start the Engine. Adjust the H Screw In until the Engine Revs Properly. Then Allow Engine to Idle. Set the L Screw so there is No Hesitation when Going from Idle to Full Throttle. Now Set the Idle Screw. Hope this Helps. I am here if you Require more Assistance. Let me know what Happens, Please. Thanks.
