Jonsered Chainsaws

[Real1shepherd]

I took an older Jonsered switch apart and put it back together somehow. They are flimsy affairs for such nice quality saws. I think I just got lucky with that one.

Kevin

 

[Cantdog]

I went ahead and brought the 521 down from the attic and got started on it.

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Handle heater switch is broken, but the best I could tell by looking at the pieces that were left it was not melted.

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I never really paid attention to the brake on this one.

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Ignition is different from the 52E, I did check with a suitable spark plug and it has a decent spark. The spark plug that is in the saw does not have the screw off terminal top.

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The rear handle has a heater element as well.

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I got a good start on cleaning tbe bigger pieces.

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I still have all of the smaller bits to go.

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Mark

The 521E was very expensive for the day and considered the “Cadillac” of the 50cc Jonsereds line up. You’ll note the pto case half, P&C, top covers, front and rear handles etc are identical to the 52E. The flywheel side case half, recoil cover, flywheel and ign are pure 521. The pecking order, bottom to top of this family was 49sp, 52, 52E and 521EV. The 521 retailed for more than the 621 in 1977. It was the first Jonsereds to come stock with that goofy brake.

 

[Cantdog]

I took an older Jonsered switch apart and put it back together somehow. They are flimsy affairs for such nice quality saws. I think I just got lucky with that one.

Kevin

The early two speed heater switches were more like the kill switches with a metal toggle but the later ones featured a plastic toggle. They all seemed pretty light duty. The plastic ones didn’t last well in real world use

 

[heimannm]

The two speed heater switch on this one is the metal type as you have seen, but the internals are all gone. I will try to remember and get a photo when I am on that saw again.

It is intriguing that Jonsereds went to such great lengths to design and build the best chainsaws possible, then cheaped out on items like the switches and wiring, and later on such chincy choke rods (920/930 and 625) and plastics. I should try to remember that there is always a contest between engineering, manufacturing, purchasing, and then the poor old sales & applications group.

Mark