[LyleLacock]

With Walbro carb, two adjustment screws (one black, one white w/plastic cover in shape of steer head) as well as an idle speed screw. The trimmer was running, though "doggy" and wouldn't idle, I backed out the black screw ~3/8 turn and made it run and idle like a precision watch LOL when warmed up. Now, after cooling and attempting a cold start it wants to flood as soon as the starter rope is pulled, even w/o choke. I can make it run by turning the screw back in to within ~1/4 turn of bottomed out but can't find a happy medium between where I started and where I am now. Btw, fuel system and air filter are clean, with fresh gas/oil @ 32:1. I'd like to know exactly what the two adjustment screws do, and some guidance on getting the carb adjusted... properly. Thanks

 

[bwdbrn1]

Those are referred to as High and Low adjustment screws. They are for just what their names imply, one is for low speed, the other for wide open.

This is for a different model of trimmer, but the carb is most likely the same, or sure close. Hope that helps.

Homelite trimmer carb adjustments - DoItYourself.com Community Forums

You can check this guys videos out. He has some about Walbro carbs on there.

donyboy73's Channel - YouTube

 

[LyleLacock]

Thanks bwdbrn1

 

[LyleLacock]

All's well that ends well, and I've got the little beast starting, running and idling as it should. Now, if only $200K tractors were this easy to work on...
Thanks again!

 

[Austen]

All's well that ends well, and I've got the little beast starting, running and idling as it should. Now, if only $200K tractors were this easy to work on...
Thanks again!

Good to hear!! Nothing like tuning and engine and getting it run right. Always a very rewarding feeling.

It sounds like you may have some other equipment?

 

[bwdbrn1]

Great! Glad to hear it's running like it should.