Originally Posted by
grizz1
With the GX Series, leave the HSN at flush (should be set flush from factory).
The LSN will be flush also, but wind it in 1 full turn.
This will give you a pretty rich motor, but it will run.
During the first tank, maybe come in 1 HOUR on the HSN and 1/4 of a TURN on the LSN to get the motor where you want it - just a little rich and spluttery, but not really boggy.
As you go along with the break in just lean a little at a time as the tanks go through.
A race tune on the GX5 (allowing for ambient temps and fuel brand etc) will be close to: HSN 2 - 3 HOURS in from flush (never much more) LSN 1.5 - 1.75 TURNS in from flush.
Thanks Grizz..I've put a litre through this engine now and I must say it was very easy to run in. The T3 glow plug lasted through the run in process and still is in great shape. When should I change to the 97 T odonnell plug.
On another note I've got the 8m restrictor in the carb. Do I need to retune if I put the 7m restrictor in. What's the difference in performance in moving down to a smaller restrictor?
cheers