Stihl 150 tc drilling exhaust

[Mr Fowler]

Hi! Seen on the interweb that people have been doing this and Im at a loose end at the yard today. Why would you do this and what kind of difference does this make to the saw and is it a worthwhile thing to do?

 

Ta!

[Charles Hey Arborist]

Seems to help it rev up a bit faster and have a bit more power. Does make it noisier and probably invalidate warranty though.

[Mr Fowler]

Thanks for the reply Charles. Don't think I have any warranty left anyway. Worth doing would you say?

[spudulike]

What you are doing is allowing the exhaust gasses out faster and allowing the carb to charge the combustion chamber up more efficiently.

 

Drilling the exhaust does get the saw cutting harder - it is probably worth turning the H screw anti clockwise as far as the limiters will allow and keep an eye on the plug colour but you shouldn't have any issues.

 

Just make sure that no metal swarf ends up in the exhaust once done - I have drilled a running saw before now to ensure the inside of the muffler stays clear of metal particles but make sure the brake is on!

 

Start with a 5-6mm and end on a 10mm - One thing to bear in mind is if you employ workers and this is a saw you give to them to do there work, you may fall foul of the HSE if you mod it and there is an accident requiring over 2 days off work so go careful. If it is your own saw for personal use - go to it:thumbup:

[Mr Fowler]

What you are doing is allowing the exhaust gasses out faster and allowing the carb to charge the combustion chamber up more efficiently.

 

Drilling the exhaust does get the saw cutting harder - it is probably worth turning the H screw anti clockwise as far as the limiters will allow and keep an eye on the plug colour but you shouldn't have any issues.

 

Just make sure that no metal swarf ends up in the exhaust once done - I have drilled a running saw before now to ensure the inside of the muffler stays clear of metal particles but make sure the brake is on!

 

Start with a 5-6mm and end on a 10mm - One thing to bear in mind is if you employ workers and this is a saw you give to them to do there work, you may fall foul of the HSE if you mod it and there is an accident requiring over 2 days off work so go careful. If it is your own saw for personal use - go to it:thumbup:

 

Cheers Spud. It's my saw and use it at the company I work for so I guess I'll go for it? I'll take the exhaust off before I drill it and get the air compressor on it. Out of interest why would you start on 5mm and end on 10? Is that just to make a neater hole?

[spudulike]

Cheers Spud. It's my saw and use it at the company I work for so I guess I'll go for it? I'll take the exhaust off before I drill it and get the air compressor on it. Out of interest why would you start on 5mm and end on 10? Is that just to make a neater hole?

 

Yup, trying to start with a 10mm hole isn't easy!

[Theocus]

Ive gone to 6mm on mine and runs really well.

[Gerbutt]

7mm on mine and it's ace!

 

 

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[RobRainford]

started with 5mm, was awesome, has been upped to 8. 200t rarely sees light of day now!

[Rich Rule]

10mm on mine and she screams