Just pulled down my Brushwhacker (37.7 cc) after about 10 years of not having run it. Didn't start on the 10th pull, so I checked the spark (still good) but gas isn't getting through, so I pulled the carb (it's a Mikuni and they're still in business). So I've got my fingers crossed on it still being functional after cleaning. There's not much in there to go wrong. I think I bought the think in 1990.
The last time I used it was with a 10" carbide saw blade to clear small trees and a blackberry thicket. It did the job very well--it's a real beast. I've put a line head on it as my regular trimmer has rotted out the carb innards and I'm waiting for the rebuild kit.
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15 minutes later, after cleaning out the carb, the thing started on the second pull. They don't build 'em like this any more, do they?