Outdoor Power Equipment, Small Engine, Lawn Mower Repairs, Troubleshooting and Safety
Disassembly, Cleaning and Repair of 498027 Carb from Briggs & Stratton 28B700 Series Engine (28B702 1173)
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- #1. Removal of fuel line
Pinch off the fuel line to stop fuel flow and remove the fuel line from the carb (#1).
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- #2. Remove air cleaner base
After removing the air filter, remove one screw from the air filter area and two nuts from the air cleaner base flange at the carb. (#2).
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- #3. Breather tube attached to air cleaner base
#3 shows the attachment ot the crankcase breather tube to the underside of the air cleaner base. To remove the tube, press it through from the top with your thumb.
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- #4. O-ring between carb and air cleaner
Remove the air cleaner base and note the O-ring seal in the base's flange (#4).
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- #5. Links to governor, throttle and choke
#5 shows the carb after removal of the air cleaner, with linkages visible.
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- #6. Closer view of linkages
The above photo (#6) shows a closer view of the far end of the choke rod, throttle rod, and throttle spring. It is not necessary to disconnect the throttle rod or spring at this end.
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- #7. Carb and links in position
Unhook the throttle spring from the carb, and remove the two carb mounting studs (#7).
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- #8. Rotate carb, slide choke rod out
Slip the choke rod out of its bracket by rotating the carb counter-clockwise (#8).
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- #9. Choke link hooks in from underneath
#9 shows how the choke rod is hooked into the choke lever from the underside. Disconnect the throttle rod by tilting the carb and slipping the carb off the hooked end of the rod (#10).