Jason's 670 project

[Spike60]

OK, I'm going to ape Powerstroke's Husky 50 thread with excessive pics and bits of info. My friend Jason asked me to create a nice 670 from these 2 cadavers, so that's what we're going to do. Today was tear down and discovery. Must be enough stuff here for a decent saw, right? Both saws were made in 95, about 3 months apart.

 

[Spike60]

Somebody's already been messing with this one, cause that is not a 670 top end. It's a highway 272 kit. Also an aftermarket carb. Well, we aren't going in that direction. First, I don't like highway at all. Second, the end result is going to be a proper 670. Not a Chinese 272 dressed in red. Also notice the seal collar is missing. All kinds of of hot air gets blown back to the carb if ya don't put one in there.

 

[Spike60]

Naturally the clean case is busted, so I'm going to go with the other one if it checks out

 

[Spike60]

This is a real 670, and she is a mess. Tank is shot, so we are gonna use the tank from the other saw.

 

[Spike60]

Isn't this clever. Jay, did you do this? WTF.

 

[Spike60]

There's a better solution if anyone wants to use the thin fuel line instead of the expensive and hard to find molded line. These tank grommets from the 55 and a host of other saws will make life a lot easier. The extra hole is for the "compensating" or "supermix" carb. It ain't that important. And I've plugged them off with no issues. Think it was more of a gimmick than anything.

 

[Spike60]

Changing these springs is a lot of fun, isn't it? Had access the dark corner of my vocabulary and intimidate it, but got it done.

 

[Spike60]

Cylinder is in good shape. Gave it a quick hone. Will be getting a Dukes piston. The 670 and 625 both got this intake set up. Ahead of its time with the boot, clamp, and support ring that most everything went to.

 

[Spike60]

Maybe finish it tomorrow. Heading in to the house now. Got another one of these waiting for me.

 

[Funky sawman]

Back when I just ran huskys and johnyreds religiously, I had a 670II and a champ. Both saws would outcut the 272 huskys, but didn't seem to hold up due to intake boots tearing. Was this what you experienced also spike60?

 

[Chainmale]

Changing these springs is a lot of fun, isn't it? Had access the dark corner of my vocabulary and intimidate it, but got it done.

View attachment 376328

Ah, so it wasn't just me that found this a bit challenging!

 

[Cantdog]

Looking Good Bob!!!!!

 

[Spike60]

Back when I just ran huskys and johnyreds religiously, I had a 670II and a champ. Both saws would outcut the 272 huskys, but didn't seem to hold up due to intake boots tearing. Was this what you experienced also spike60?

Never saw it that often myself. That was mostly addressed by going from the wire clip to the band style clamp on the intake boot. But your 2 saws should have had that improvement.

I'll get the service bulletin up here at some point, but I may have already posted it in the Jonsered thread over in brand specific. They changed the cylinder along with the boot. They also anchored the carb better.

 

[Spike60]

Looking Good Bob!!!!!

Hey Robin!

 

[Funky sawman]

One of them had the impulse built into the intake manifold

 

[Spike60]

Ah, so it wasn't just me that found this a bit challenging!

There's actually a special factory tool for those springs. I have NEVER been able to get it to work. 2 screw drivers and a pair of vice grips is what I always resort to.

 

[Spike60]

One of them had the impulse built into the intake manifold

You thinking 630 maybe?

 

[Funky sawman]

Nope it was a 48mm

 

[Funky sawman]

Rubber boot and a short brass nipple on the intake manifold face

 

[Funky sawman]

they both has rubber intakes, one with a wire clamp, the other with a normal hose clamp