Since we were successful with the CS-360T, figured I'd open up one of the 510's to see if we could help it out some? I took the one with the most hours on it, and removed the spark arrestor screen and opened up the deflector a bit. The hole in the deflector was tiny, in comparison to the hole coming out of the muffler. My guess is that the restictive opening helps with emissions in some way, probably gives the stuff more time to react with the catalyst, not sure, but it's got to be to keep the EPA happy.
WOW, immediate noticable improvement! Ran a tank thru it cross cutting some old oak chunks to make them easier to split. That's about as hard as one can work a chainsaw, and it did a great job. We were able to competely bury the 18" bar without stalling it out.
Moving on to the CS-670 next, its pretty un-impressive for a 67cc saw with a piston ported engine. Our Husky 268XPS will cut circles around it. Maybe we can open up the muffler and get the performance level up a bit, it really needs something?......Cliff
WOW, immediate noticable improvement! Ran a tank thru it cross cutting some old oak chunks to make them easier to split. That's about as hard as one can work a chainsaw, and it did a great job. We were able to competely bury the 18" bar without stalling it out.
Moving on to the CS-670 next, its pretty un-impressive for a 67cc saw with a piston ported engine. Our Husky 268XPS will cut circles around it. Maybe we can open up the muffler and get the performance level up a bit, it really needs something?......Cliff