Outdoor Power Equipment, Small Engine, Lawn Mower Repairs, Troubleshooting and Safety
Disassembly, Cleaning and Repair of Walbro LMS Carb on Briggs and Stratton Engine 125K02 0137
Briggs part numbers 493627, 497586, 498170
used on selected Models 110602, 110612, 110682, 111602, 111682, 111687, 11A602, 120602, 120607, 120609, 120612, 120H02, 120H07, 120K02, 121702, 121782, 121802, 121882, 121H02, 121H82, 121K02, 122702, 122782, 122802, 122H02, 122H07, 122H82, 122K02, 122K05, 122K07, 122K09, 122K82, 122T02, 122T05, 123702, 123802, 123782, 123882, 123K02, 123K05, 123K07, 123K09, 124702, 124782, 124802, 124882, 124K02, 124T02, 124T05, 124T07, 125K02, 125K05, 125K07, 125K09, 126702, 126782, 126802, 126882, 126K02, 126T02, 126T05, 126T07, 126T12, 127702, 127707, 127782, 127787, 127802, 127807, 127882, 127887, 127H02, 127H07, 128702, 128712, 128802, 128807, 128809, 128812, 128882, 128887, 128H02, 128H07, 129702, 129782, 129787, 129802, 129807, 129812, 129882, 129887, 129H02, 129H07, 12A802, 12B802, 12C702, 12C802, 12D802, 12E802, 12F702, 12F707, 12F782, 12F802, 12F805, 12F807, 12F809, 12F812, 12F882, 12F887, 12F889, 12G702, 12G782, 12G802, 12G882, 12H702, 12H707, 12H712, 12H802, 12H805, 12H807, 12H809, 12H812, 12H882, 12H887, 12J702, 12J707, 12J802, 12J805, 12J807, 12J809, 12J882, 12J887, 12L902, 12M802, 12M807, 12M882, 12M887, 12M902, 12Q802, 12T702, 12T802, 12T807, 12T882, 12T887
-
- #1. Complete engine prior to Disassembly, Cleaning and Repair
This page shows the Disassembly, Cleaning and Repair of 498170 carb on Briggs and Stratton Engine 125K02 0137 (Craftsman Pressure Washer 580.752722).
-
- #2. Carb bowl located behind air filter
#1 shows the engine prior to Disassembly, Cleaning and Repair .
-
- #3. Use 1/2 in. socket to remove carb bowl nut
Often it is not necessary to remove the carburetor from the engine to get the engine to run properly. Locate the carb bowl as shown in #2. Pinch off the fuel line to stop the flow of gas.
-
- #4. Tilt and lower carb bowl
Using a 1/2 in. socket, remove the bowl nut (#3) and remove the bowl (#4). If the bowl does not easily separate, it is simply stuck to the bowl gasket. The carb bowl and bowl nut, as well as the inside of the bowl area can now be cleaned.
-
- #5. Fuel passage in side of bowl nut connects to center hole
The passages in the bowl nut are the most critical and most likely to be a problem. #5 and #6 show two views of the bowl nut and the passages through which the fuel passes.
-
- #6. Fuel passage in center of bowl nut connects to side hole
-
-
- #7. Main nozzle in center post extends into venturi
The fuel is drawn up through the bowl nut and up through the main nozzle, as seen in #7 looking up the carb's center post from below. Clean this area and the passages with spray carb cleaner and blow through with compressed air.
-
- #8. Check float for operation and level
Check the operation of the float to see that fuel flows freely when the float is lowered, and stops when the float is held lightly in the up position. Work the float up and down while fuel flows to flush out any small debris that may be present. Check to see that when the float is held lightly in the up position, or with carb inverted, it is parallel to the carb body (#8). This carb uses a replaceable rubber seat for the float needle. Check that the bowl gasket is intact and properly seated.