Originally Posted by
morocho1979
Hi i from Venezuela i have a go 5 port silver head how many shim can i use for the 3000ft of altitude i use 25% fuel and p3 glowplug my runtime is 5min 6min with luck and i re tune everytime i go out the engine onli have 2gallon
Run 1 x alloy .3mm shim and 2 x copper .1mm shims for a total of .5mm.
This is factory standard and sweet for 25%. I would run a medium temp plug on 25% (O'Donnell 97T or similar), just my preference (might be better at that altitude too - maybe a little more run time ?, not sure).
Originally Posted by
vyt666
what's the factory needle settings for the go carb with the short LSN?
thanks!
Try .75 turns in from flush on the top, and 1.25 turns in from flush on the bottom. This will be in the ball park, probably a little rich which is good to start with - tune from there.