Walbro

  walbro carby,tecumseh engine with walbro carburetor,walbro carburetor operation,walbro carburetor settings,walbro carburetor system

1. Metering lever set too low 2. Hole in metering diaphragm 3. Leaky manifold gasket or block 4. Loose cover screws 5. Pump diaphragm check valves worn 6. Dirty or plugged inlet screen 7. Obstructed or damaged fuel or pulse line 8. Fuel tank cap not venting 9. Idle needle set too lean Readjust lever [...]

CAUSE: 1. Metering lever set too high 2. Metering diaphragm misassembled 3. Inlet needle will not seal 4. Idle needle set too rich Readjust lever to correct height with gage. Place metering gasket on body before placing metering diaphragm. Remove inlet needle and wipe tip clean or replace. Also wash and blow inlet seat clean. [...]

Carburetor models listed on side of gage indicate the side used lor lhat carburetor metering system. ADJUSTING THE METERING LEVER 1. With metering diaphragm cover (4 screws), metering diaphragm and gasket removed: 2. Metering lever adjustment instructions are pictured below using our metering lever gage. 3. Make sure the metering lever spring is seated properly [...]

  HIGH SPEED NEEDLE ADJUSTMENT With the engine at the high speed position the manifold vacuum draws the majority of the fuel from the carburetor nozzle, WITH BOTH NEEDLES SET AT V/A TURNS OPEN PROCEED AS FOLLOWS: 1. With the high speed needle set at 1V* turns open the engine should be running at a [...]

  IDLE ADJUSTMENT OF HDA NOTE I: With the engine at the idle position the carburetor feeds fuel thru the primary idle hole. The second and third idle holes act as air bleed holes to mix with the fuel to create the correct air/fuel ratio. NOTE II: Both high speed and idle adjustment needles are [...]

  OPERATING FUNCTIONS 1. Fuel Inlet: Fuel drawn trom lank enters here. 2. Impulse Fitting: Engines crankcase impulse enters here. 3. Fuel Pump Diaphragm: Activates in response to crank¬case pulse to transfer tuet to pump check valve. 4. Inlet Check Valve: Opens during vacuum pulse. Closes during pressure pulse. 5. Fitter Screen: Filters fuel before [...]