Stihl ms 201 tuning up but is missing.

[Greenworx Ryan]

After a bit of advice, I have a stihl 201, had it about a year and for the last 4 month been running it on aspen fuel, recently it has sounded like it is missing, I can tune it up so it is running spot on, as soon as it starts cutting it gets bogged down like it hasn't got the power to get through a log 8" in diameter and sounds awful.

Any suggestions on how to sort this?

[GardenKit]

I have a customers machine which is behaving exactly the same but has never been run on Aspen.

 

I have overhauled the carb and attempted to tune it but to no avail.

 

It is nearly 2 yrs old and has always been gutless, but that is pretty normal.

 

It has just had a pot and piston upgrade, it pressure/vac tests perfectly, but still bogs down in the cut.

 

It is looking like it needs a new carb. If it was a 200T it would be easy as I keep the carbs in stock, so its easy to stick one on and prove a point. But the 201t carb is expensive and Stihl say they have had no issues.

 

I cannot spend any more time on it. so am going to order a new carb anyway. I willkeep you posted. good luck with yours

[chrisgilltreesurgery]

Try drilling two 6mm holes in the muffler, my old 201 runs and revs like a 200t woop woop!

[chrisgilltreesurgery]

You could send it to spudulike and it will come back with a twin turbo, janspeed exhaust and k&n induction kit! Do it

[Stubby]

After a bit of advice, I have a stihl 201, had it about a year and for the last 4 month been running it on aspen fuel, recently it has sounded like it is missing, I can tune it up so it is running spot on, as soon as it starts cutting it gets bogged down like it hasn't got the power to get through a log 8" in diameter and sounds awful.

Any suggestions on how to sort this?

 

My advice would be to get a T540 . We have both and the 201 is pants next to the 540 .......

[GardenKit]

Try drilling two 6mm holes in the muffler, my old 201 runs and revs like a 200t woop woop!

haha, that may make a normal 201t go better, but will not fix a sick one.

[chrisgilltreesurgery]

Janspeed exhaust it is then, get it down to spud

[Greenworx Ryan]

Yeh definitely lay gonna get a t540 next, you would think stihl would get there finger out and sort the issues out with this especially as it's replacement to one of the best saws ever made.

[spudulike]

As Barrie says, you need to get a sick saw running well first before doing any tuning work - makes a lot of sense:thumbup:

[Greenworx Ryan]

Any ideas spud to check you seem like you know what your doing with tuning and getting the best from a saw?