Originally Posted by
grizz1
The machine gunning is probably coming from having the top end too lean, which is being masked by the bottom end being too rich.
You will have a Gen 5 long LSN carb.
Re-check the idle gap is .7 - 1mm wide. This is really important, otherwise you will be chasing a tune forever.
Set the HSN at flush, and the LSN at 1 turn in from flush and give it a run.
Depending on what happens go either in or out on the LSN until you have a good idle and take off, then tweak the HSN for a good top end. Half a turn in on the HSN is about max for a long LSN motor (which is what you will have). Any leaner on the top than this and you will start getting lean bog etc.
Let us know how you get on.
Still a bitch to tune and to hold a tune when it's close. Guess I have to tear it down and seal it up. I don't understand why I have to do this when it's new. Never had to seal up a Traxxas or Losi engine and they tuned up just fine with no extra shit to do to them. WTF GO? Should change their name to WAIT. Why can't one just just drop a new engine in, break it in, tune it up and GO? NO NO NO got to go to the hardware store and buy a drill bit to set idle, buy sensor safe sealant, tear it down, seal it up, teflon tape the needles, do the hokey pokey and pray it will tune. My fuel tank and and lines are new and pressure tested so I know it's the damed carb. Can't wait for the Novarossi carb to come in the mail.
I'm sure it's me and I don't know what I'm doing but I've never had to put this much effort into getting an engine to run right. I had better luck with the older gen GO carbs.