does anyone know what the factory settings are for the spec 3 .28 as i keep eating glow plugs and want to start the break in procedure again.

Andy

The factory settings of the engine are as following and are a good starting point for you, if you
are not satisfi ed with your carburetor settings. Turn in the needles completely (Caution: Do not
overtighten them!) and loosen them the required number of turns again:
Idle screw (#1):
Adjusts the air fl ow when carburetor is fully
closed. Turn CW for higher idle-speed and
CCW for lower idle-speed. Should be open 0.5-
1.0mm.
Low speed needle (#2):
Adjusts the mid/low-speed flfl ow rate of the fuel.
Turn CW for leaner and CCW for richer setting.
• Low speed (#2): 3,75 turns
• Main (#3): 3,75 turns
Main speed needle (#3):
Adjusts the main fl ow rate of the fuel (when the throttle is opened
signifi cantly). Turn CW for leaner and CCW for richer setting.
Carburetor venturi inserts:
In order to affect the fuel/air mixture, you can use different venturi inserts on this carburetor.
These are to fi netune your engine to different track layouts. There are three different venturis
coming with the engine: 7.5mm, 8.5mm and 9.0mm.
- 9.0mm has the most power, 7.5mm has the best fuel consumption.