Found this online...
This was back in the early 1990's when I found this out, back when one could call Homelite on the phone, and actually talk to someone that knew...
And to make it even more fun, both flywheel versions, had the same part number.........
No, there were 2 different brands used, and their flywheels had reversed polarity, so you had to use the matching flywheel/coil.
One has to be careful on that model, you have to get the coil that matches the flywheel.
Go to the Stihl dealer and buy the fuel line......
You'll need a m4 eventually...
get a faster cutting chain, you'll like it better!!
Like this one......
He is talking about the needle/lever under the cover/diaphram with 4 screws.
No, you need a .050 ga. bar too....
It works fine with the .050 gauge chain too, and the cutters don't bend in hard wood!!
Here is what one looks like, the screws are too tight to let fuel squirt out.
You need the proper vent setup.
Can you take a pic of the lines?
Is it plating missing?
If it is, yeah, find another cylinder, there are plenty around.
Yeah, buff it all off real good, and put it back together, but make sure it is well lubed, since you used brake cleaner.
Yeah, The cleaned up cylinder has to look like new, as any imperfection will damage the new piston soon.
But all is just speculation without pics.
Are you talking about the top one?
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