[Mgs] Carbs still being nasty

[PaulHunt73]

I've been having posting to and receiving messages from MGS lately, but got this, so here goes:

If you have HS cabs then if the jet has not been centred correctly the piston won't fully descend, which can cause stalling.

Wind the jet down as far as it can go and see if that allows the piston to fully fall.  If it does not, then there is another problem such as a bent needle, piston binding against the cover, etc.

If the piston fully drops with the piston lowered, then wind the jet up to be flush with the bridge while you recentre the jet, then you can be sure that with the jet wound back down to its normal running position it will be clear.

Jet will bubble up out of the jet, with the ignition on, if the vent/overflow plumbing is blocked.  This goes via the charcoal canister if that is what you have.

The idle with HS carbs (unlike HIF carbs) will gradually fall if left idling long enough, like several minutes.  But if it drops sooner than that try pressing the butterfly cams onto the idle screws as soon as you release the throttle, and see if that makes it idle lower straight away.  If it does then the butterflies aren't returning fully, which could be them binding in the carb throat, insufficient return spring pressure, binding linkages, insufficient free-play on the throttle cable, etc.

PaulH.




  ----- Original Message ----- 
  The piston drops just fine with a good clank. When the piston drops with it inside the pot is when I get problems. It goes all the way down except but the last little bit....
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/mgs/attachments/20161129/d75cc45b/attachment.html>