Fuel system parts & tools

1. Custom jets for the WG carburetor    2. Metering lever gauge    3. Carburetor rebuild

1. Custom jets for the WG carburetor

See the high altitude modification page for information and how to install the correct sized jet for your application.  The most common high altitude jet is #112 for 80cc engines or #125 for 130cc engines.

WG-8 carburetor details

jet size desired

2. Metering lever gauge

Southwest Airports makes this custom gauge that is similar to the official Walbro gauge but has the correct dimensions for the *button-type* diaphragm found in nearly all WG repair kits sold in North America and the EU.  For details on the differences in the gauges, see the carburetor tune-up page.

Southwest Airsports Metering Lever Gauge

The gauge is stamped on one side with "SouthwestAirsports.com" so as not to be confused with the official Walbro gauge and all of the clone gauges.  Use of the custom gauge will save time, trouble, and expense for all pilots who service the Walbro WG or WB  carburetors.  Fortunately, the WB repair kits come with the height of the ML set correctly but, even so, the ML height should always be checked because the ML lever can be accidentally bent in handling.

How to use the Southwest Airsports gauge gauge

gauge w bubble-pack 1 oz./28 grams


3. Carburetor rebuild

Complete rebuild of a Walbro or Tillotson diaphragm carburetor – includes replacement of the parts supplied in the OEM kits including the metering lever spring.  After assembly, the pop-off and rest pressures will be measured to ensure that they are within specifications.  Adjustable jets will be set to the factory recommended values.  Note: Rebuilding your carburetor may or may not fix other underlying fuel problems, such as poor quality gasoline, clogged/defective inline filters, incorrect jetting, leaking fuel lines, etc.  The carburetor must be adjusted for your climate, altitude, and engine condition to work properly.  This page has the details.

Carburetor must not be damaged e.g. bent low speed idle jet, bent throttle plate, bent choke lever, etc. and be complete.  There is an extra charge for any missing parts.  Please clean the outside of your carburetor with (but NOT in) hot soapy water with a stiff brush.  Rinse with hot water and dry.  Do not immerse the carburetor in water or any other solvent.   Wrap the carburetor with bubble wrap or heavy paper and put in a a small box.  Do not ship in a bag.  Send it USPS 1st Class small package or Priority Mail to the address on the contact page.  Turn around time can be a few weeks if we are busy training or flying.

type and model of carburetor