One for modded saw builders

hoss · Mar 6, 2006

Hey guys i'm just curious as to what, if anything con be don to mod a stihl 075/076. I'm not looking for anything too crazy just a little more power with good reliability. As always thanks.

Lakeside53 · Mar 7, 2006

I wouldn't... It's a pretty big cylinder/piston already, with tons of torque, but limited at the top end by the carb (it has a jet limiting valve that dumps fuel into the mixture based on vibrations from the motor) at around 10,000... so unless you're prepared to risk saw damage (flywheel and other...) by going higher in RPM, there isn't a lot you can do. Unlike a modern saw, these are not designed to rev...

sawn_penn · Mar 7, 2006

I figure that the 076 has got be be able to hold its own against some of the current saws as is is still sold (along with the 08S, 051 and the 070) in some markets.

It looks like a pretty gutsy saw.

Lakeside53 · Mar 7, 2006

Not just in third world either - the 076 engine is still sold in the USA as the TS760 cut-off saw (just superceeded this month).

klickitatsacket · Mar 7, 2006

Andy is talking with a little wisdom behind him. With that said I tend to be a bit younger and a little more foolish. :chainsaw:

(just giving you a hard time Andy) 2 things you can do to this saw with out going crazy are: #1 open the exhaust a little wider for a little quicker blow down. #2 add a 3/8" to 1/2" spacer under the carburetor made from another intake manifold. When you do this you will have to change a couple of the mounting holds. (longer straps). Also if you are not working in wet weather put a K&N filter on top. These mods will give you a tiny bit more RPM (nothing to worried about) but will also increase the torque by some. Now when you make the spacer you will have to play with the thickness a little until you find the length. What you will be doing is tuning the intake. One last thing you can do if you have the skill is to reshape the intake port a tad. As stated already the 075 and 076 are already quite the beasties. With a little work though they can be turned into monsters.

Lakeside53 · Mar 7, 2006

klickitatsacket said:
Andy is talking with a little wisdom behind him. With that said I tend to be a bit younger and a little more foolish. (just giving you a hard time Andy) 2 things you can do to this saw with out going crazy are: #1 open the exhaust a little wider for a little quicker blow down. #2 add a 3/8" to 1/2" spacer under the carburetor made from another intake manifold. When you do this you will have to change a couple of the mounting holds. (longer straps). Also if you are not working in wet weather put a K&N filter on top. These mods will give you a tiny bit more RPM (nothing to worried about) but will also increase the torque by some. Now when you make the spacer you will have to play with the thickness a little until you find the length. What you will be doing is tuning the intake. One last thing you can do if you have the skill is to reshape the intake port a tad. As stated already the 075 and 076 are already quite the beasties. With a little work though they can be turned into monsters.

If you want mod the intake airflow, just pick up a filter set and used cover for TS760... massive increase in surface area... and it's stock.

Be really careful adjusting the carb - it's way to easy to get it too lean as the "automatic enrichening" valve gets in the way...

Don't leave off the rear mounting strap to the air filter base plate - it is the grounding path for the cut off switch.