ronT2
ArboristSite Guru
I know it's rude to butt in.........
Buy the Zama C3 and the carb flange anyway! My 04 didn't start acting up until after my '06-and has way more hours on it. I thought that it was just the newer HDA's . But for like $60 its worth it to have on hand just in case.
And I also remember reading a Jonsered advertisement that described a compensating carb but strangely, have never read any threads about it.
Not rude at all…just more good info. I finally found the C3-EL42 on the Zama website tonight. They have the venturi diam. listed at 17mm. I couldn’t find a C3-EL carb with over a 15mm venturi until now. The HDA- 199 is listed at 16.66mm. With the mods that I’ve done to the saw I really didn’t want to go any smaller.
Mastermind, here’s what I got for timing #s.
Stock 2159 timing.
Measurements without base gasket.
Squish: .021"
Intake: 78° BTDC=156°
Exhaust: 104°ATDC=152°
Transfers: 120°ATDC