More juice in the MS261?
- Thread starter Stihlahoi
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The 261 is a limbing saw, .325 16” bar (max 18”) cutting 12” rounds is where it’s happy.Hi
After getting lost in the forum, google and youtube jungle for the past 3hours my brain is absolutely fryed and i dont know where im at anymore
Anyhow i want some more juice in the old 261.
Its a work saw so im not after 100hp gain and red glowing exhaust but alitle more umpf would be nice.
Running a 20" bar with 3/8.
Reading something about it not responding so well to porting? is it a waste?
So is removing gasket, MM and timing a good way to go on these saws?
Thanks in advance.
Now i need fresh air and a drink
Said I'd get back to you when I'd completed my mods.
Well a muffler mod to 75% of exhaust port size led to a 10% improvement in power.
The base gasket delete, led to a 23th squish and a 15% increase in compression.
The power (including MM) was up 47%. So very worthwhile.
This was using the same bar, same chain and same glued together 2x3" timbers.
Feels very different with lots more torque.
I still prefer to use it with an 18" bar but certainly if you must use a 20" bar then the gains from a MM and base gasket delete seem worthwhile. Took about an hour to do the base gasket and I'm a beginner so not too big an investment in time.
Well a muffler mod to 75% of exhaust port size led to a 10% improvement in power.
The base gasket delete, led to a 23th squish and a 15% increase in compression.
The power (including MM) was up 47%. So very worthwhile.
This was using the same bar, same chain and same glued together 2x3" timbers.
Feels very different with lots more torque.
I still prefer to use it with an 18" bar but certainly if you must use a 20" bar then the gains from a MM and base gasket delete seem worthwhile. Took about an hour to do the base gasket and I'm a beginner so not too big an investment in time.
Nice! 47% gains is impressive.
What chain are you using?
I dont need the 20", but it looks cool and its handy cause the saw has an all-round use.
But as an non modded saw its to much.
I didnt get a new saw as people suggested, but took it apart and modded it.
Gasket delete, muffler mod, ported intake and exhaust, strato delete.
Waiting on some parts and should get a startup this weekend.
What chain are you using?
I dont need the 20", but it looks cool and its handy cause the saw has an all-round use.
But as an non modded saw its to much.
I didnt get a new saw as people suggested, but took it apart and modded it.
Gasket delete, muffler mod, ported intake and exhaust, strato delete.
Waiting on some parts and should get a startup this weekend.
Using 3/8 1.6mm on an 18" generally. It certainly runs like a different saw with the changes as its got a lot more torque. Sure it would be even more impressive on the .325 but most of my other bigger saws run 3/8 full size.
Yes, I have a new 261 with the 16 in bar and the picco super chain. Great combo.
Timed cuts are great
