Zenoah carb specifics

[UpstateRotor]

Hey John-
What needles did you settle on for the 257? Something like 2 1/4 low and 1` 1/2 high?? Quite a bit different than how I had my boats setup!! I tried the needles like I had 'em set on my boats and the low needle was close but the high needle was WAY lean?! More loading?!

Shawn

[UpstateRotor]

After diddling with the 257 needles on and off for a month, I finally got the high needle where it needs to be but the low needle is giving me fits. :arggg: :dontknow Engine sounds like it's running rich but when you "read" the plug it shows lean. I had the 643 working well so it's back to the stock carb with the primer bulb removed. :D