Translations:KAVAN AP09A - Instruction Manual/64/en

8. After 20 to 40 seconds, disconnect the battery to the glow plug. Then slowly turn the needle valve to „lean“ the mixture and increase rpms. Over adjusting or abrupt adjustments will „over lean“ the engine and cause it to stall and possibly to damage the engine. If this is the first or an early run for the engine, refer to the Break-In section of the manual before continuing.