I would like directions to change the weed eater line on a Bolen BL-150 weed eater.

Hi,
The manual is available at:
Bolens 2-Cycle Gas Trimmer Operator's Manual | ManualsOnline
And has about 1 1/2 pages devoted to the subject.
Peace,
Clarke

What is the gap setting for the BL150?

How do you rewind the crankrope when changing?

I need to change the cank rope rope on my Bolens BL 150 how do you rewind the new rope? Please give me step by step for this job.