ORIGINAL: RCIGN1

Check out that fancy new case hardened con rod >>Where's the big end bearing ?
The Stihl 090 CHAIN SAW has exactly the same con rod style, open in the center..Wonder where DA got the idea ?
CHAIN SAW technology ? Still a bad word here ?
A pressure tap anywhere in the case with a line to the back cover of the carb works just fine, been doing it for 18 years on most Zenoah engines....Makes for a more secure pulse....IF the reeds seal well.....Not a problem on a piston port engine....
Kinda hard to see what difference a change in the pulse passage would make, unless it was just borderline before...Like the phenolic carb rotators from brand "H"...