Thanks Kind Sir! I'll give it a shot..
This worked great for me except for some goof ups on my part. At first, I bought the cheap knock off wt-215 on Amazon. I couldn't resist that it came with all those goodies like replacement fuel lines, fuel filter, spark plug, etc. all for $12 including shipping. After installing it, the saw would die after starting up. Thats when I found Brad's instructions here. The cheapo carb didn't even have a center impulse passage, so I bought a genuine Walpro and epoxied up the passage that was katy-corner on the housing, and drilled out the plug in the center passage. Turns out that had the same issue: the saw would start, then within a few seconds just die. I pulled my hair out trying every carb setting, then even pulled it off and put the original carb back on. Same issue!. Then i reversed the timing advance I had done. Finally I figured it out: The cheapo carb came with a gasket that blocked the center impulse passage. I left this on when I first put on the cheapo carb. Once I removed this gasket, the saw fired right up. Another tip: When I re-enabled the timing advance, I cut a small wire and carefully pressed it into the gap before resetting the screw - this helped assure the advance wouldn't slip back when I tightened the screw.
Just did two 170s. WT-215 is the best upgrade. Worth the money on these low end saws
How do you go about doing that?
