Pioneer 620 - bringing it back to life

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cdahl383

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Nov 14, 2024
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Location
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Recently picked up an old Pioneer 620 chainsaw. The seller said it was his father-in-law's (the seller looked to be in his late 60's to early 70's). He wasn't sure if his father-in-law bought it new or not, but said he had it for a very long time. It looked like it sat in the corner of the garage for decades. Very dusty/dirty, but appeared to be complete. I brought some tools and my compression gauge with me when I checked it out. It had good compression and looked complete, so I bought it.

I brought it home and spent some time just cleaning it up. Not a fan of working on dirty stuff. Got it cleaned up pretty good and then did some basic diagnostics on it. Checked the compression (showed 150psi on my gauge), verified that it had spark, and took the muffler off to check out the piston/cylinder through the exhaust port (looked really good). Everything seemed to look pretty good. I opened the fuel tank and it was all varnished up in there and stunk terrible. I pulled the sediment bowl/fuel line out and filled the tank with Berryman Chem-Dip carb cleaner. Four hours later the tank was spotless!

I ordered a carb rebuild kit for the old Tillotson HL22A carb, cleaned the existing air filter, and continued cleaning the saw up as much as I could. Now I'm just waiting for the carb rebuild kit and a few other small things. Hoping after rebuilding the carb I can get it fired up and running again! No plans to put it into serious use, but would like to use it occasionally around the house to cut up a little firewood just for fun.

Here's a few photos / videos I've taken along the way so far:





 

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Here's some photos after I cleaned it up a little bit and a couple before/after photos of the fuel tank...
 

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