How about a jonsered 670

TK

Hand Rubbed Pork
Jan 9, 2012
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I've got the father in laws 1986 Jonsered 670 here. When I'm done it's going to be immaculate, and it HAS to run perfect. I can take care of that. He says he's taken a carb off I think a 70e and fit it up to this saw. I'm gonna have to take a close look and see what he's done. I know some saws have simple little tricks you can do to them to squeak out some easy power gains - anybody know of anything for this model? I'd like to keep away from the traditional muffler mod as far as noise is concerned. I may open up the inside a little bit but don't want it crazy loud. The saw is going to be given to my brother in law as he will be burning wood starting this coming winter. I'll keep ya posted on the refurbing of the saw as I go. Lots of pics with this one hopefully.
 
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komatsuvarna

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What is the 670 in line with on the husky side of things? Don't feel like crossing parts over right now and won't have much of a chance this week.

266/268 I believe. The J'red has a different impulse setup. Lots of parts will interchange between the models, but some wont. The J'red has a different intake track too.
 
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Spike60

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Jan 12, 2012
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Can't be a 70E carb, cause the 70E lacks the separate impulse line. Plus the choke and throttle controls are on opposite sides.

The muffer on those things is pretty good stock and already has a nice bark to it. Plus those early low profile mufflers are NLA from either Jonny or Husky, so it's best not to poke holes in them. The later style 268/272 or 670 Champ mufflers are a bit taller and will contact/melt the early top covers. (and the covers do not interchange between the early and late models)

Like your recent 910 project, you'll like the way this saw runs once you are finished with it. If you want to dress it up, the starter decal is still available, but the rest of the early decals are NLA.
 
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ChainsawmanXXX

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I got this 670 from a friend pretty cheap. He said he replaced the carb as well with another carb? A newer one, he said it didnt run right after swapping on a new carb.. Im gonna watch this thread good :)
 

TK

Hand Rubbed Pork
Jan 9, 2012
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Maine
www.tkpowerequipment.com
Can't be a 70E carb, cause the 70E lacks the separate impulse line. Plus the choke and throttle controls are on opposite sides.

The muffer on those things is pretty good stock and already has a nice bark to it. Plus those early low profile mufflers are NLA from either Jonny or Husky, so it's best not to poke holes in them. The later style 268/272 or 670 Champ mufflers are a bit taller and will contact/melt the early top covers. (and the covers do not interchange between the early and late models)

Like your recent 910 project, you'll like the way this saw runs once you are finished with it. If you want to dress it up, the starter decal is still available, but the rest of the early decals are NLA.

Awesome, good to know. I'll get the carb numbers off it and run them by you to see what saw it came from. And the starter decal is in decent shape, it's the serial tag that's missing info :( It's a Jonsereds 6 at the moment. How do I tell if it's a super or II or just plain? Or champ? I dunno what versions there were. I'll leave the muffler alone on this one considering the availability issues.


I got this 670 from a friend pretty cheap. He said he replaced the carb as well with another carb? A newer one, he said it didnt run right after swapping on a new carb.. Im gonna watch this thread good :)

When you get it apart, let me know what model carb is in there and if it's the same as this one I can let you know how he's got it rigged up :thumbsup:
 

ChainsawmanXXX

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Awesome, good to know. I'll get the carb numbers off it and run them by you to see what saw it came from. And the starter decal is in decent shape, it's the serial tag that's missing info :( It's a Jonsereds 6 at the moment. How do I tell if it's a super or II or just plain? Or champ? I dunno what versions there were. I'll leave the muffler alone on this one considering the availability issues.



When you get it apart, let me know what model carb is in there and if it's the same as this one I can let you know how he's got it rigged up :thumbsup:

Im gonna check in the next couple of min. Ill take pictures! :)
 

ChainsawmanXXX

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Its a tilly. The only numbers i could see without tearing the whole carb off is #230D535


I like the duct tape fix on the fuel line haha
 

TK

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Just the model of carburetor, body style. Good for certain size ranges of motors. Like walbro having wa,wt,hd,hda,hdb,wyl, etc. etc.

The HS is a good carburetor fo sho!
 

Kevin

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Feb 7, 2012
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670 is one of my favorites, just a nice compact bundle of power. This saw along with the husky 266 was a standard for a lot of the local loggers and firewood people back in the day. The only problem compaired to modern saws would be anti-vibe...and I guess now, also fuel consumption. How far are you going with this one Tom? Are you thinking porting?
 

TK

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Jan 9, 2012
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Well it'll be immaculate when I'm done for sure. All new AV, fuel line, filter, vent, caps, piston ring, intake gaskets, carb kit, drive rim, choke lever, spark plug..... Lol just minor stuff. I'll probably do some cleanup of machining, transfer blending, and maybe a minor port widening if I feel like it. It has to be low low maintenance and able to be neglected severely when I'm done with it. I'm no pro porter and don't want any issues down the road. I'm sure he'll be happy with it either way. Definitely looking forward to it, going to be a lot of fun.
 

Spike60

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Jan 12, 2012
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And before we had the 670....................There was the 70E. Got me a few of these now. Still run them too. Maybe I'll have to do a 70E vs L77 comparison, huh?


 
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TK

Hand Rubbed Pork
Jan 9, 2012
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www.tkpowerequipment.com
And before we had the 670....................There was the 70E. Got me a few of these now. Still run them too. Maybe I'll have to do a 70E vs L77 comparison, huh?



I got a 621 silver top here same recoil but looks older than that saw there. I've also got a 630 that looks newer but has a similar fuel cap. Am I dealing with cross-breed saws or what? Lol I don't know what is supposed to be original and what isn't. Is the 621 any good? I've heard it's a dog.... Not well liked by some northern Maine loggahs.
 

Spike60

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Jan 12, 2012
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A dog, huh? They know not what they say!. :rock:

621's are awful nice saws, but they are only 56cc and top out at 10,600 RPM. As with most saws from back then, the torque is usually there when you need it. Very smooth and quite ahead of it's time when it was on the market. Most 621's seem to show up with 8 pin rims on them, but I always like to run a 7 cause I like to be able to push on it a little.

This 621 is an early model, as indicated by the early starter decal.



 
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TK

Hand Rubbed Pork
Jan 9, 2012
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I care not for the one here in the shop. It's been severely neglected by it's owner so I don't have a good model to represent itself. The flywheel pawls were sticking so the recoil wouldn't engage, that's all the guy wanted fixed. The rest of the saw is in tatters, I couldn't even get it started. But, that's his problem, he just wants the recoil done and that's it - don't touch anything else!!! :yup:
 

TK

Hand Rubbed Pork
Jan 9, 2012
8,808
8,483
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Maine
www.tkpowerequipment.com
I'll be digging into this saw this week, along with a 570 and a 350 owned by a buddy. The 350 will get a little modification to it, 570 will get whatever I can figure out to give it. And the 670 is just going to be cleaned up and restored to its glory days condition.
 
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