Walbro Carburettor Info and Settings
When fitting your chosen carb to the 35, make sure to fit the heat isolator with gaskets (supplied)
either side of it between the carb and the manifold (see photo for correct fitment). Take your time
to use the correct length bolts for each different intake/stack on the market so that its secure.
Make sure you complete the run in of the engine on a rich setting before considering leaning it out for
optimal performance. Please remember your climate and altitude could result in the requirement for
different settings, so as with any two stroke, start with caution and care.
FACTORY SETTINGS (Baseline)
Speed mixture adjustment screw
Speed mixture adjustment screw
RT990 = Base setting is
turns out RT990 = Base setting is
turns out
1107 MOD= Base setting is
turns out 1107 MOD= Base setting is
turns out
Heat isolator with high temp gasket
fitted either side (supplied)
Idle Speed Adjustment Screw
The base settings of the mixture screws may need some adjustment to suit your local
atmospheric conditions e.g. temperature, humidity. If so adjustments should be made 1/16
of a turn at a time, with a test run after each adjustment.
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General