stihl 026 ideas?

[jake wells]

Been thinking of what to do with my 026 and i think i have a basic idea but not sure how it will pan out.
- modded muffler.
- 194 carb.
- nylon mesh filter.
- .020 - .025 timing advance.
- base gasket delete.

Wanting to get the compression up and see if it can gain some torque no port work though im just wanting more compression guessing 170-190psi it currently has 155 lbs.
What is everybody's thought on what this saw would do? With these mods i know it isn't a screamer just something with more oomph. And finally here is a small saw with a big bar next to big wood.

 

[Chainsaw Jim]

.015 sounds a bit better to start with. You'll need more than just a gasket delete to get the compression up that far from 155.

 

[VinceGU05]

pop some fresh rings in it while its apart. if you do have a grinder you could widen the exhaust and inlet ports a bit.

 

[drf256]

If it's a very late ms260 style cylinder, you may be able to get away with a base gasket delete. In my experience, the later jugs give you about .017 squish base gasket delete. The earlier/026 style are only about .009 without gasket.

Roof flashing is .009-.010 and is easy to make a gasket with.

You need to buy a caliper, there's really no other accurate way to check squish unless you wanna try yellow plastigauge.

Buy a set of cabers and either run a single top ring or just replace the top ring.

An easy but loud muff mod on that saw is to cut the front opening up square, like 1.5 X 1.5" from the inside. Drill a new hole and move the screw to the PTO side. Slide some coarse screen under the heat shield outside and screw it on. A little paint and it's tough to know that you were there. If you can weld, an @Red97 deflector on the fly side works even better.

Your plan sounds good. Jim is correct about compression. You'll likely bump it to 170, which is totally fine. With my 026 mods, I'm now doing all I can to keep compression lower. My builds come in at 240-260 psi.

 

[Chainsaw Jim]

If it's a very late ms260 style cylinder, you may be able to get away with a base gasket delete. In my experience, the later jugs give you about .017 squish base gasket delete. The earlier/026 style are only about .009 without gasket.

Roof flashing is .009-.010 and is easy to make a gasket with.

You need to buy a caliper, there's really no other accurate way to check squish unless you wanna try yellow plastigauge.

Buy a set of cabers and either run a single top ring or just replace the top ring.

An easy but loud muff mod on that saw is to cut the front opening up square, like 1.5 X 1.5" from the inside. Drill a new hole and move the screw to the PTO side. Slide some coarse screen under the heat shield outside and screw it on. A little paint and it's tough to know that you were there. If you can weld, an @Red97 deflector on the fly side works even better.

Your plan sounds good. Jim is correct about compression. You'll likely bump it to 170, which is totally fine. With my 026 mods, I'm now doing all I can to keep compression lower. My builds come in at 240-260 psi.

With compression like that have you ever ran vp110 in one?

 

[dall]

the one al did for me was at 240 when he did it and i run 90 octane non ethanol

 

[jake wells]

guys the only mod i plan to do on the cylinder is remove the base gasket i also found out this saw was sold around late 2001 according to stihl dealer locally so im not sure what stihl used cylinder wise in 2001.

 

[Fifelaker]

Check the squish, 026's are notorious for pistons slapping the roof with a gasket delete.

 

[dall]

when you have cylinder off you can take pics and it may tell you

 

[Stihlsmoking]

Metal mesh filters are still out there if you look in the right place

 

[drf256]

View attachment 32441 View attachment 32442
Metal mesh filters are still out there if you look in the right place

Won't allow his rear cover to lock on.

 

[Stihlsmoking]

Won't allow his rear cover to lock on.

Didn't notice his has the newer style lock.

 

[drf256]

Didn't notice his has the newer style lock.

Yeah, it's annoying.

I've learned the hard way.

 

[jake wells]

according to pics sent to al its a 44mm.

 

[Stihlsmoking]

according to pics sent to al its a 44mm.

I'm pretty sure only the pros had 44.7 mm.

 

[Stihlsmoking]

Yeah, it's annoying.

I've learned the hard way.

But I know it fits mine.
But keep that in mind for future saws.

 

[GoBigBlue1984]

If you can make it up some weekend Jake I'll cut the base for you if you'd like. Throwing that out there.

 

[Whiskers]

I'm pretty sure only the pros had 44.7 mm.

That's not true, I've rebuilt several 026 pros with 44mm topends.

 

[Stihlbro]

Does your muffler look like this?




If it were me, take 10 minutes and add the extra holes like the above picture. The non adjustable carburetor may very well run fine as typically when you open up the muffler, you will need to richen up the low side and lean out the high side. This will tell you what potential is being held back. And the best part, no money is spent yet.

 

[skip sail]

i'm interested in how this turns out,as I have an 026 that I've put aside for modding.