Husky 272 Hop Up

Gypo Logger · Feb 2, 2006

This 25 year old model of saw is really worth working on and finding parts for.
It shares much the same parts as a least half a dozen other saws. Mine started out as a 272K concrete saw and ended up as a 268 with a 272 barrel and piston. I will be modifying the saw, but first wanted to share with you guys a few basic findings before I start to port the saw.
I notice the compression was on the low side at 130# so I installed a new ring which pump it up to 165# and that's with the base gasket in.
Anyway having done that, I noticed a huge increase in power and throttle response. And why wouldn't I? :blob2:

Just to show the wear on the old ring note the picture which shows the old ring below the new one. We're talkin at least 2 mm difference in the end gap.
John

Gypo Logger · Feb 2, 2006

Here's what I did to the muffler. The first picture is fresh off the 272K concrete saw and the next one is the finished muffler.
John

Gypo Logger · Feb 2, 2006

The stock intake elbow on the 268 seemed a wee bit compromised to me with regard to size and flow so I fitted it with a 266 intake elbow which simply bolted on. I ground off some casting imperfections on the inside of the elbow with a sanding roll.
The carb is off a 385, but I had to swap out the choke and throttle linkage as well as drill a hole in the carb as the impulse arrangement is different on the 385 than it is on the 272.
Also the stock squish clearance is 37 thou., so I will experiment with different thicknesses of gasket material to see if I can bring it down to 25 thou. or so.
John

Mr. · Feb 3, 2006

Gypo we're all expecting alot out of this saw. Make er sing would ya?

My 372 is gonna beaver some wood tomorrow. Er 375. A side note for those who want to get in on the novice 372 challenge. The 375 has so much meat in the lower transfers, I won't have to kill the turkey. The 372 is a better place to start.

I post some pics on a new thread tomorrow.

Fred

Gypo Logger · Feb 3, 2006

Fred, I think this 272 is gonna be a keeper so I'll make some cuts with it.
I want to try out the 375 barrel as well on my 372. I think Eric did that with his 2171 and got great results. Keep us posted.
John

Freakingstang · Feb 3, 2006

It is funny you all are talking about a 375 barrell...Guess what my next project is. Got a good piston, and a cylinder going to undergo the miratic acid treament tomorrow....Out to make a stout "365" or so the sticker says

John, I will call you one of these days....

SawTroll · Feb 3, 2006

Gypo Logger said:
This 25 year old model of saw is really worth working on and finding parts for.....

I don't think the 272xp as a model is more than about 15 years old, but the basic costruction came with the 162se in 1976.

Gypo Logger · Feb 3, 2006

I noticed that slip earlier but neglected to change it since some of the parts I used were from the 266 from 1981 which shares the same casing, so I have made a real hybrid I guess .

John

SawTroll · Feb 3, 2006

Gypo Logger · Feb 3, 2006

Here's a vid of the 272 after the few changes I made. It's 14" dry Red Maple with a basic work chain. Will do another vid after the porting and a new race chain I'm building.
Remember fellas, building a saw is no different then building a chain, some are just faster then others, so don't be afraid to try things out. It's fun and it works! :blob2:

Mr. · Feb 3, 2006

Too bad she didn't stand up.

She looks like she'll run with the 372 for sure.

Nice work.

I'm pumped about other people getting into the 10 over 365's.

Fred

rmihalek · Feb 3, 2006

What's a 375? Is that a concrete saw? What was that red thing in the previous post?

Gypo Logger · Feb 3, 2006

rmihalek said:
What's a 375? Is that a concrete saw? What was that red thing in the previous post?

Hi Bob,
Yes the 375 is a concrete saw and the barrel is a bolt on arrangement with the 372.
The picture you are refering to is a cutter with some bar oil on it. I thought it would make a good picture.
John

Chris J. · Feb 3, 2006

John, as usual great photos! But they're killing me on dial-up. Yeah, yeah, I know, "Quit whining, and get a d@mn DSL line!"

rickyrooster · Oct 7, 2007

Hey Gypo Logger

What ever happened to the 272 hop up. still waiting for the results.:monkey: Ha Ha!!

kevlar · Oct 7, 2007

SawTroll said:
I don't think the 272xp as a model is more than about 15 years old, but the basic costruction came with the 162se in 1976.

I agree I think you will wind up with a wicked saw after you are finished!

kevlar · Oct 7, 2007

SawTroll said:
I don't think the 272xp as a model is more than about 15 years old, but the basic costruction came with the 162se in 1976.

I agree I think you will wind up with a wicked saw after you are finished!

motosierra · Oct 8, 2007

The 162, 61, 66, 266 and the 268 were precursors to the 272. They all use the same case and they are all rock solid, dependable ...and bullet-proof.

buck futter · Oct 8, 2007

What I don't understand is why they have aftermarket 266/268 jugs and you can't get a 272 aftermarket.

then with other saws they even go larger than what the OEM jug was like on the BB 044/046/066 372?

whats going on here?

romeo · Oct 8, 2007

buck futter said:
What I don't understand is why they have aftermarket 266/268 jugs and you can't get a 272 aftermarket.

then with other saws they even go larger than what the OEM jug was like on the BB 044/046/066 372?

whats going on here?

I completely agree with you on that one, you can find the 50mm jug and piston everywhere for under a $100. Cant find nothing on the 52 mm stuff, I even have a nasty looking 272 piston sitting on my shelf that I am scared to throw away:monkey:

Husky 272 Hop Up

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