272xp

[thumper]

have a 272xp that has a little low compression of 140. Looking through the exhaust the cylinder and piston look to be in good shape. Can I just get away with replacing the ring? Also does this saw not have an exhaust gasket? Mine just has the heat shield.

Also, any benefits to running a modified muffler on a stock saw?

 

[Dub11]

Welcome!
Yes to the ring just make sure the jug is clean, does the piston have machine marks on it?
Yes it should have a gasket for the muff.
And oh hell yeah a muffler mod will help! And if you can go with a base gasket delete to give her a little more of a boost on compression.

 

[thumper]

Welcome!
Yes to the ring just make sure the jug is clean, does the piston have machine marks on it?
Yes it should have a gasket for the muff.
And oh hell yeah a muffler mod will help! And if you can go with a base gasket delete to give her a little more of a boost on compression.

Thanks!

What do you mean when you say machine marks? The jug still has cross hatches it looks like. Everything looks good inside from looking through exhaust and spark plug but I haven’t taken the top end off. The saw still eats through 25 inch oak rounds like butter and starts with no issue.

For the base gasket delete you are just removing the gasket and checking squish right? What’s the magic squish number 0.020?

Are any of the modified mufflers on eBay any good?

 

[thumper]

Welcome!
Yes to the ring just make sure the jug is clean, does the piston have machine marks on it?
Yes it should have a gasket for the muff.
And oh hell yeah a muffler mod will help! And if you can go with a base gasket delete to give her a little more of a boost on compression.

Any idea what part number the gasket it? I’m not seeing it online anywhere.

 

[Deets066]

Are any of the modified mufflers on eBay any good?

Don’t buy somthing like this, you want a side exit. It’s ok to come out the front, but it should be deflected one way or the other.
The muffler in this pic could be a fire starter in a decent cut.

 

[thumper]

Well I dk, this looks to be in good shape to me but I’m definitely not a saw expert.

 

[thumper]

Sorry pics didn’t go through.

 

[beaglebriar]

Sorry pics didn’t go through.

Yeah that piston is fine. Use an OEM or Caber ring. Pretty much everything else is garbage

 

[thumper]

Yeah that piston is fine. Use an OEM or Caber ring. Pretty much everything else is garbage

Know anywhere I can get OEM gaskets and rings? I might do the base gasket delete if it’s worth it.

 

[kfd518]

Dealer will have the ring and gasket set. If no dealer near Hlsupply or fix my toys on eBay normally have pretty decent oem parts prices, HL supply carries cabers or they can be found nearly anywhere on eBay.

Edit
I went with HLSupply for nearly everything on my 272/61 conversion recently.
Fix my toys will often have OEM top ends pretty cheap.

 

[kfd518]

As far as the base gasket goes you will probably have to custom cut on to get you squish just right. I used .010” compressed to .008” That put it at .022” squish.

 

[thumper]

As far as the base gasket goes you will probably have to custom cut on to get you squish just right. I used 1/64” (.015). That put it at .022” squish.

Good to know. It’s just my firewood saw so I probably won’t bother.

The saw does have an exhaust gasket right?

 

[beaglebriar]

Know anywhere I can get OEM gaskets and rings? I might do the base gasket delete if it’s worth it.

HL supply (site owner) has OEM husky stuff. Not sure if they have rings listed or not. Check squish clearance if you delete the gasket.

 

[Stump Shot]

Sorry pics didn’t go through.

Take the ring off, put it in the bore and check the gap, if under .010" put it back on.

 

[beaglebriar]

Take the ring off, put it in the bore and check the gap, if under .010" put it back on.

I'd guess that it's fine. Doesn't look like there's any blow by on the piston.

 

[thumper]

Take the ring off, put it in the bore and check the gap, if under .010" put it back on.

Nice info I will check that.

 

[thumper]

Take the ring off, put it in the bore and check the gap, if under .010" put it back on.

.018”. I can actually slide the base gasket in which is .020” I think.

 

[Czed]

have a 272xp that has a little low compression of 140. Looking through the exhaust the cylinder and piston look to be in good shape. Can I just get away with replacing the ring? Also does this saw not have an exhaust gasket? Mine just has the heat shield.

Also, any benefits to running a modified muffler on a stock saw?

Welcome to the sitehere's one stump shot did for me
Don't need earplugs.
But I'm near deaf anyway
Rering it and run it.

 

[thumper]

Welcome to the siteView attachment 183483here's one stump shot did for me
Don't need earplugs.
But I'm near deaf anyway
Rering it and run it.

Nice muffler mod! Saw absolutely rips as is can’t wait to see what it’s like at 100%.

 

[Czed]

Nice muffler mod! Saw absolutely rips as is can’t wait to see what it’s like at 100%.

That's probably a red97 deflector
@Stump Shot