Husky 162/272--Jonny 630/670 project thread.

[mrxlh]

@mrxlh - This is on an older 61 chassis that uses the case idle screw vs. the newer ones that use the carb idle screw.

@CJ Brown - I suspected that as well, but the shaft is perfect. Maybe the shaft plating on some years is harder than the carb body.

Ok I was wondering why an idle screw carb wouldn’t work on a 268/272 case, makes sense with the 61 case.

 

[slackinoff]

I have some old tillotson hs carbs mostly from dolmars though I could look around and see what I have if you would like?

Hey sorry I missed this post. I might take you up on that later if I can’t get it to work. Hs260 carb will here Wed and I will make sure to post an update after I try it out.

It should be good info for anyone in the future. These 224a carbs are harder to find now, especially in decent condition. It’s a special carb in my opinion for guys with case idle screw saw’s because it has the same venturi size as the 272 carb (hs260a).

I made a video a while back timing cuts between the 15mm Walbro WS17 to the 17.5mm Tillotson HS224a. It surprised me, I timed something like a 14% improvement in cutting speed compared to that smaller 61 walbro.

Thanks again Shane

 

[Czed]

I'm curious what this 288 spring mount trick entails?

https://opeforum.com/threads/jonsered-6xx-husky-266-8-72-spring-av.15835/
I didn't see your post
Johnmn created this mod

 

[slackinoff]

Update on swapping the older HS series "'case idle screw" style throttle shaft onto the newer HS260 with the "carb idle screw" style throttle shaft.

It worked perfectly fine. I used a non worn HS163a (factory 61 carb) shaft and return spring. The spring ends are clocked differently between the new and old. The HS260 spring could be used, but it would make for a pretty tight trigger pull.

@CJ Brown - you were right about the shaft being worn, it was terrible. The one I inspected was from a tillotson hs163a that was in good shape. (this is the actual shaft I used) - I got the two confused when inspecting. The 224 carb body was unfortunately still wallowed out though. I test fitted the new shaft onto it see.

 

[slackinoff]

Question - did the husky 61 ever have a limited coil? I have a grey top 61 two piece ignition, it’s acting like it has a limited coil and I didn’t think these saw ever had them.

 

[davidwyby]

I don’t think so

 

[Stump Shot]

Question - did the husky 61 ever have a limited coil? I have a grey top 61 two piece ignition, it’s acting like it has a limited coil and I didn’t think these saw ever had them.

Unless you have a kill/spark wire shorting out type of issue, I'd say your saw is on its way to total ignition failure. Least ways every one I've ever seen start acting up ended badly. They just have too much age on them and when one half starts to go, it's not long and the other half follows suite. Best to replace as a set.

 

[slackinoff]

Unless you have a kill/spark wire shorting out type of issue, I'd say your saw is on its way to total ignition failure. Least ways every one I've ever seen start acting up ended badly. They just have too much age on them and when one half starts to go, it's not long and the other half follows suite. Best to replace as a set.

Thanks Steve. I talked to Pat about this as well. He said there might have been a cut off saw version and somehow that ignition found it's way onto this one. I might try taking the ignition advance out of it just to make sure I didn't take it too far. If it's an ignition issue, it's very consistent at the rpm it starts cutting spark at. I don't have much experience with failing ignitions though...

I will report back with part numbers to see if you guys might be able to help me cross out a cut off saw ignition from the list.

 

[lehman live edge slab]

Thanks Steve. I talked to Pat about this as well. He said there might have been a cut off saw version and somehow that ignition found it's way onto this one. I might try taking the ignition advance out of it just to make sure I didn't take it too far. If it's an ignition issue, it's very consistent at the rpm it starts cutting spark at. I don't have much experience with failing ignitions though...

I will report back with part numbers to see if you guys might be able to help me cross out a cut off saw ignition from the list.

The two I dealt with acted like they were limiting rpm also then they just completely quit. Ended up with the Chinese 2 pc set in both of them and so far they’re lasting been 3-4 years at least.

 

[Stump Shot]

Thanks Steve. I talked to Pat about this as well. He said there might have been a cut off saw version and somehow that ignition found it's way onto this one. I might try taking the ignition advance out of it just to make sure I didn't take it too far. If it's an ignition issue, it's very consistent at the rpm it starts cutting spark at. I don't have much experience with failing ignitions though...

I will report back with part numbers to see if you guys might be able to help me cross out a cut off saw ignition from the list.

There was a 272k cut off saw, that had a one piece ignition though.

 

[Stump Shot]

Thanks Steve. I talked to Pat about this as well. He said there might have been a cut off saw version and somehow that ignition found it's way onto this one. I might try taking the ignition advance out of it just to make sure I didn't take it too far. If it's an ignition issue, it's very consistent at the rpm it starts cutting spark at. I don't have much experience with failing ignitions though...

I will report back with part numbers to see if you guys might be able to help me cross out a cut off saw ignition from the list.

Also during that time period the only way to limit rpm was with a governor on the carbeltater. Limited coils hadn't been invented just yet.

 

[slackinoff]

@lehman live edge slab - Hey thanks for the info, I was just about to ask that. I'd rather not spend good money on an old set that might be on it's way out.

@Stump Shot - Good info on the cut off saw. That eliminates that question.

You know, I originally thought I somehow got a hold of a governed 224a carb. Which was a good thing because it led me to find out the carb body was toast. Thank you again.

 

[Sauen]

Hi all, after reading this thread on the different types of pistons that came on the saws, I’m not quite sure which pistons can be swapped in which cylinder.
I just bought a nice jonny 630 super, with a 48mm closed port cilinder. The piston is scored due to someone using a screwdriver as a piston stop in the exhaust port.. rings are worn too. So I would like to use a newer piston I had lying around in the 630 cylinder.
Now my question, is it ok to use this single ring, non skirted piston (is this called a windowed piston?) on the second picture instead of the original, double thin ring and skirted, piston? The non skirted piston I would like to use came from a husky 61 if I recall correctly.
Thanks in advance,
Olivier

 

[Spike60]

Wow, Lotta good research you guys are doing on these carbs.

That windowed 61 piston works just fine in a 630. And a 162SE.

The limited coil in the 268K and 272K is green, so there's no mistaking it. And it's limited to a pretty sedate 9,000. Some of the earliest twin ignitions used a pretty short plug wire. Very prone to shorting to the cylinder fins if a taller 268/272 jug is used. I don't think there was ever a twin coil K saw. Not in the US anyway.

 

[slackinoff]

@Spike60 - Good info thank you.

The coil set arrived, hopefully I can get it installed before dark to test it. I am ready to have this saw finished up (if it works....)

 

[Spike60]

Will look forward to the report.

 

[slackinoff]

@Spike60 - It got dark on me! AM coil set seems excellent quality. Wire insulation feels like silicone. Found what might have been the problem. The insulation on original was cracking. I forgot I had liquid taped it but missed a spot. Pic of that below.

 

[slackinoff]

@Spike60 - I put three tanks through it today cutting firewood for my buddies cabin. Saw runs beautiful. It was begging for lower rakers so I did.

That wood (hickory or walnut not sure) looks like hell on the outside but is still really good inside.

 

[Spike60]

That is cool! The saws in the lantern light look great. Glad she's running good. I cut up a big ash blow down today. Mostly ran a Husky 280 and a Jonsered 820.

Start....

 

[Spike60]

....
To finish...........