Jonsered Chainsaws

[fossil]

There was a really nice 621 up for auction up in Ontario. I didn't see the final sale price but I doubt it was over $150 CDN. I was tempted but have put a hold on buying saws until I have more space. I sold one of my collector Poulans today and that was a hard parting ways for me.

Some pics of that 621

 

[Cantdog]

What do you guys think about this ?
https://www.ebay.com/itm/264720273534

That my friend is the "Cadillac" of the 49CC Jonsereds family. It's a 521E. It has many hours on it......you can get an idea by noticing the lack of paint on the trigger handle right where you hand would go. Power wise exactly the same as the 52E. Many parts swap from the 52/52E models but it is a different beast.......different electronic ign and flywheel, different flywheel side case half and different recoil. If you cut in cold weather you would probably enjoy the electrically heated handles.....two settings...high and low. Originally it would have also come with a chain brake.....the first Jonsereds to offer it as a stock item....not a dealer added accessory.
Good solid saw...I have several and one is generally in use in the winter.

 

[Cantdog]

There was a really nice 621 up for auction up in Ontario. I didn't see the final sale price but I doubt it was over $150 CDN. I was tempted but have put a hold on buying saws until I have more space. I sold one of my collector Poulans today and that was a hard parting ways for me.

Some pics of that 621

View attachment 841079View attachment 841080View attachment 841085View attachment 841086

Geeze...that's a nice one and well taken care of. When you see someone has gone to the trouble of building a nice box to keep it in, you know it has been well maintained!!

 

[Real1shepherd]

That my friend is the "Cadillac" of the 49CC Jonsereds family. It's a 521E. It has many hours on it......you can get an idea by noticing the lack of paint on the trigger handle right where you hand would go. Power wise exactly the same as the 52E. Many parts swap from the 52/52E models but it is a different beast.......different electronic ign and flywheel, different flywheel side case half and different recoil. If you cut in cold weather you would probably enjoy the electrically heated handles.....two settings...high and low. Originally it would have also come with a chain brake.....the first Jonsereds to offer it as a stock item....not a dealer added accessory.
Good solid saw...I have several and one is generally in use in the winter.

Funny that its bigger brother, the 621 first came out in '70 and continued until '82 but was always points. Whereas the 521 came out in '74 with electronic ignition and also 'EV' for the heated handles.


Kevin

 

[jonsereds 621]

I have become rather addicted to 49sp's largely thanks to this site. It seems often to be the case that the oil filler. plug (same as 621) is damaged or missing its washer, or just missing. My latest addition had a standard iron square head plumbing water pipe plug ( I assumed forced in ) as an oil filler cap. On close inspection it seems the Jonsereds oil filler is actually 1/2" BSP (why this should be I can't even guess). This got me thinking, and after a good sift through my hydraulic miscellaneous box I came up with a really good solution. New hydraulic spool valves etc usually come with the ports blocked with a plastic plug, if it has 1/2" BSP ports it will have 1/2" BSP plugs. The plugs I have have a good thread, a shoulder with recess for o ring and even more conveniently a 19 mm hex head (same as plug spanner) and almost unbelievably a screwdriver slot in the top. In my opinion a really good fix. Better still, these would be discarded by the bucket full at any hydraulic specialist.

 

[Real1shepherd]

I have become rather addicted to 49sp's largely thanks to this site. It seems often to be the case that the oil filler. plug (same as 621) is damaged or missing its washer, or just missingView attachment 841507. My latest addition had a standard iron square head plumbing water pipe plug ( I assumed forced in ) as an oil filler cap. On close inspection it seems the Jonsereds oil filler is actually 1/2" BSP (why this should be I can't even guess). This got me thinking, and after a good sift through my hydraulic miscellaneous box I came up with a really good solution. New hydraulic spool valves etc usually come with the ports blocked with a plastic plug, if it has 1/2" BSP ports it will have 1/2" BSP plugs. The plugs I have have a good thread, a shoulder with recess for o ring and even more conveniently a 19 mm hex head (same as plug spanner) and almost unbelievably a screwdriver slot in the top. In my opinion a really good fix. Better still, these would be discarded by the bucket full at any hydraulic specialist.

I had to look this up:
"BSPT (British Standard Pipe Thread) is similar to NPT except there are important differences. The angle across the flanks of threads (if you sliced the fitting in half long-ways and measured the angle from root to crest to root) is 55 degrees instead of 60 degrees as it is for NPT."

I have seen J'reds with NPT(National Pipe Thread) plugs in there. It's a reasonable fit without damage that I could see. I have seen this plug you're talking about in hydraulic valves....no doubt NPT here.

If the BSP plug is a better fit, it would only be available to you guys over there.

Kevin

 

[taplinhill]

Funny that its bigger brother, the 621 first came out in '70 and continued until '82 but was always points. Whereas the 521 came out in '74 with electronic ignition and also 'EV' for the heated handles.
Kevin

My theory, which I've had for a long time now, is the 66E was supposed to replace the 621, but proved to be an unpopular failure. It took the 630 to finally replace the 621 which had a similar run as the 621 did.

 

[Goinwheelin]

Good info on the oil cap. Most likely BSPP given the short thread engagement and the use of an O ring or gasket.
It stands for British Standard Pipe Parallel. Much like our NPS thread here in the states.
Found these. Will work in a pinch
https://www.ebay.com/itm/312742745233

 

[Real1shepherd]

My theory, which I've had for a long time now, is the 66E was supposed to replace the 621, but proved to be an unpopular failure. It took the 630 to finally replace the 621 which had a similar run as the 621 did.

That's a very plausible theory....I like that!

I just find it so odd that they kept the 621 in production all the way to '82 as a points model. From around '75 on, electronic modules were becoming the norm.

Kevin

 

[taplinhill]

That's a very plausible theory....I like that!

I just find it so odd that they kept the 621 in production all the way to '82 as a points model. From around '75 on, electronic modules were becoming the norm.

Kevin

If the damn fools keep buyin' it, keep on makin' it!!!

 

[Real1shepherd]

If the damn fools keep buyin' it, keep on makin' it!!!

Lol....was and is a great iconic Jonsereds. Very, very popular workhorse saw. Used to always be 4-6 pages devoted to it on eBay and parts were plentiful for a very long time that way.

Kevin

 

[IdahoSaw]

Well just rebuilt the carb on the 49sp today and changed out the fuel lines filter and breather. New spark plug as well. Took a bit of pulling on the string before she decided to fire over. Tell you what I sure wasn't expecting it to sound that good lol
Now I need to adjust the carb. Oh put a new oregon bar and chain on it went with a 20.

 

[IdahoSaw]

Figured I would throw a new pic up now that she is back together

 

[Cantdog]

Looks good!! 20" is a lot of bar for a 49sp.......keep 'er sharp and let her do the cutting...is it .325 or 3/8"?

And welcome to the site!!

 

[IdahoSaw]

Looks good!! 20" is a lot of bar for a 49sp.......keep 'er sharp and let her do the cutting...is it .325 or 3/8"?

And welcome to the site!!

It is 3/8" and thank you
I know it's a lot of bar but I won't be cutting anything huge and the price for the 20 was cheaper then the 16 lol

 

[Cantdog]

Yep.....My favorite set up on those is an 18" light weight Sugi Hara in .325, full chisel.....they handle just right like that....but it is spendy......

 

[Cantdog]

Don't see these for sale very often....and not a bad price if you needed them.....

https://www.ebay.com/itm/Jonsered-J...347895?hash=item4daf871737:g:HrMAAOSwGthfEN8j
Hmmmm didn't see the mangled exhaust bolt hole....kind of a pain but a bit of welding and tapping but fixable......

 

[Cantdog]

Don't see these for sale very often....and not a bad price if you needed them.....

https://www.ebay.com/itm/Jonsered-J...347895?hash=item4daf871737:g:HrMAAOSwGthfEN8j
Hmmmm didn't see the mangled exhaust bolt hole....kind of a pain but a bit of welding and tapping but fixable......

Well....that didn't last long!!!!

 

[Real1shepherd]

Desperation Alley on 111/111S parts fer sure. Doesn't seem to matter what it is, or what shape it's in...it SELLS!

Kevin

 

[fossil]

I wondered if the chunks out of the piston were on the side on the cylinder showing or on the off side? I did see couple of marks on the cylinder between the transfer showing but who knows?