Re: 389 carb on standard G2
Posted: Thu Jul 11, 2019 8:04 pm
hi again,
well , all jets and settings are back to book now - it is a 389 on a standard G2
therefore the original 376 was 1 and 1/16" bore and the 389 is 1 and 1/8" bore - so a shade bigger bore
but I still have this strange fast running on tickover where it races away despite happily sitting at tickover 5 minutes before.
I just cannot get the tickover to be stable and reliable with the right mixture strength.
the only way to slow it down by making it excessively rich (screwing the air screw in) - I can get it balanced between the stop screw and the air screw one minute and then all on its own it speeds up - crazy.
I have tried AR springs etc and cleaned and cleaned this carb and poked everything through.
I have done enough carbs over the years , but nothing has behaved like this all on its own - daft !!!
any thoughts gratefully received.
well , all jets and settings are back to book now - it is a 389 on a standard G2
therefore the original 376 was 1 and 1/16" bore and the 389 is 1 and 1/8" bore - so a shade bigger bore
but I still have this strange fast running on tickover where it races away despite happily sitting at tickover 5 minutes before.
I just cannot get the tickover to be stable and reliable with the right mixture strength.
the only way to slow it down by making it excessively rich (screwing the air screw in) - I can get it balanced between the stop screw and the air screw one minute and then all on its own it speeds up - crazy.
I have tried AR springs etc and cleaned and cleaned this carb and poked everything through.
I have done enough carbs over the years , but nothing has behaved like this all on its own - daft !!!
any thoughts gratefully received.