As far as the RPM, your Jonsereds 930 spins over at 9,000 rpm. Jonsereds 2065 spins over at 9,000 rpm. Jonsereds 2171 spins over at 9,600 rpm.
Most chainsaws cut in the 6,000 to 8,000 rpm range when under load.
Interestingly, the Jonsereds 70 models spun over at 11,300 rpm. Very well built durable chainsaws. You just couldn't wear them out if you properly maintain them and ran the correct fuel ratio.
Sort of like the old Stihls 051, 056 & 076 models back then too. Not much composite plastic on those Jonsereds, Huskys and Stihls back then. They were made to work, be durable and cut wood. And yes, they weighed several pounds more.
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Today's Featured Article - Old Time Threshing - by Anthony West. A lovely harvest evening late September 1947, I was a school boy, like all school boys I loved harvest time. The golden corn ripens well and early, the stoking, stacking,.... the drawing in with the tractors and trailers and a few buck rakes thrown in, and possibly a heavy horse. It would be a great day for the collies and the terrier dogs, rats and mice would be at the bottom of the stacks so the dogs, would have a busy time hunting and killing, all the corn was gathered and ricked in what we c
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