Bolens trimmer sputters and stalls and only runs on half choke? Here's how to fix it.
Look on the top of the carburetor and you will see 2 black screws that are mostly round with a flat side recessed in the aluminum housing. They are flat on top and have no notches to insert a screwdriver. The trick is to turn these two screws 1/4 turn counterclockwise. I have a set of precision pliers and used the fine tipped needle nose to turn them.
The other option is to try and notch the top of them enough so you can use a flat blade screwdriver. You can grind down the surrounding aluminum with a Dremel tool so you can access them better.
You can see in the picture that I scratched across the top of the screws as a reference to see how far I was turning them.
Probably needs the carburetor cleaned and a new set of diaphragms put in.
SOURCE: I have a Bolens BL110 Trimmer - it starts just fine, but won't rev up completely. Suggesstions?
Could be blocked spark arrestor or carboned up in the exhaust port.
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