• Install slide assembly making sure that jet needle slides into needle jet. Also ensure that tab on diaphragm is
inserted correctly on body of carburetor.
• Install diaphragm spring, top, and two screws.
• Lubricate O-ring on air mixture screw with grease and install in carburetor.
• Turn screw in until lightly seated then screw back out 1.5 turns.
Do NOT tighten air mixture screw.
Damage to air screw and carburetor body will occur.
• All fi nal adjustments will have to be made after unit has run for at least 5 minutes and engine is at operating
temperature so that cold enrichment system has had time to set.
• Idle speed needs to be set at 1750 ± 100 RPM.
CARBURETOR STARTER SYSTEM (CHOKE OR ENRICHMENT)
This carburetor is equipped with an automatic enrichment system that is controlled by the charging system.
After engine is started the charging system supplies voltage to solenoid on carburetor causing solenoid to heat
up (3 ~ 5 minutes running time) pushing plunger into mount stopping fuel fl ow.
• Unplug wire from harness.
• Remove mount and solenoid from body of carburetor by removing two screws.
• Inspect seal for damage.
• Locate the small hole in the middle of mount and you should see the brass plunger.
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