User manual

10. Motor Settings

Thecarburettorisperfectlypre-adjustedfortherstrunsexworks.Arichcarburettorsettingisusedtosupplythe

motorsufcientlywithlubricationintherun-inphase.Thisisshownbystrongwhitesmokedevelopmentfromthe

exhaust.

Therichcarburettorsettingshouldbemaintainedfortherst2-3tankllings.Additionally,donotuseanylongfull-

throttle phases and run in the motor carefully with different speeds.

a) General Information on Setting the Carburettor

Dependingonmixtureused,sparkplug,muferandambientconditionslikebarometricpressureandhumidity,small

changesinthecarburettorsettingmayberequired.Thenesettingsofidleandfullthrottleareonlypossiblewiththe

engine well run in.

L Idle mixture regulating screw

H Main nozzle needle

S Setting screw for idling speed

Important!

The carburettor is already in the best basic setting ex works. If the motor cannot be started at initial commis-

sioning,rstlookfortheproblemelsewherebeforeturningthecarburettorscrews.

Before twisting a setting screw, write down its original position. This way, you can turn it back to the previous

position if there are any problems later.

Make the settings in small steps only. This means that the respective screws must only be turned by 1/8 turn

at most before checking the settings in practice.

Never turn all 3 screws at once. This will make it impossible to successfully start the motor.

Figure 21