Fuel Screen: Filters fuel before entering metering chamber. Inlet Needle: Lifts off seat to allow correct amount Of fuel to enter system. Inlet Check Valve: Opens vacuum to draw fuel in, closes during gressure pulse. Throttle Valve Assembly: Allows air.'tuel ratio from idle to wide throttle. Primary Idle Main fuel at the idle
Technical Information - Walbro
Learn how to find the Part Number on a Walbro Carburetor Hands-on demonstrations of key service procedures including inspection, proper disassembly, testing, and reassembly of butterfly and rotary carburetors.
Service Manuals - Walbro
All manual are in pdf format - Chainsaw Carburetors & Trimmer and Blower Carburetors.
Disassemble carburetor & clean See bottom Of page 6 Replace Diaphragm Remove obstruction Replace Gaskets Replace Check Valve with Kit Replace Fuel Pump Diaphragm Remove Fuel Pump Cover & Clean Check complete Fuel Delivery System from Pickup in Fuel Tank to carburetor Fuel Inlet for cracks, dirt, etc. Replace fuel line or Pickup Filter when
Parts & Service - Walbro
Looking for a Carburetor or Parts? Available below is our: Catalog, where you can find carburetors and their associated kits; Online Store, where you can order carburetors, kits, and other Walbro products; Distributor Listing, where you can find a Walbro distributor near you
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WYJ - Walbro
Fuel Inlet Fitting; Fuel from gas tank enters carburetor through this fitting. Overflow Tube: Discharges fuel from purge area to tank. Metering Lever: Lifts inlet needle off seat.
INSPECTION: For best results, first soak all the metal parts in a regular fuel mix, not a "carburetor cleaner solution". Examine the inlet needle, lever and spring, looking for needle wear at the tip and also at
bypassing the check valve allows fuel to be drawn up from the fuel tank, through the carburetor fuel pump, metering chamber and into the primer bulb. Once the primer bulb is at least 1/4 filled with fuel the engine is ready
1_ Fuel lines. fittings — check tor leaks or and air filter, 2. - - for kinks, etc. 3. Adjustments - Main needles. turn seat - rich side by 1/8 turn. 4. bgnition plugs - if preignition - wh med white plugs mean fuel is too - too rich _ normal, ch0031ate brown S. Fuel 16 to as recommended by 6. Tighten all Carburetor tighten all - leaks at itolds.
Fuel Inlet IDLE ADJUSTMENT OF THE WY The WY has been calibrated and the idle needle preadjusted by WALBRO prior to shipping to our customer. If the idle is in need of adjustment, the following instructions should be adhered to. Special Note: Only adjustments to the outer idle limiter and idle adjustment screw are to be made.