33
BM SERIES
1. Turn off the engine.
2. Close the fuel valve.
3. Place a bowl under the fuel cup to catch any spilled fuel.
4. Unthread the bolt holding the fuel cup.
5. Remove the bolt, Bolt Seal, fuel cup, Fuel Cup Seal and Main Jet from the
body of the carburetor assembly. A carburetor screwdriver (not included) is
needed to remove and install the Main Jet.
6. Replace the Main Jet with the replacement Main Jet needed for your
altitude range.
7. Replace the Fuel Cup Seal, fuel cup, Bolt Seal, and bolt. Tighten in place.
DO NOT cross thread bolt when tightening. Finger tighten rst and then use
a wrench to make sure the bolt is properly threaded.
8. Wipe up any spilled fuel and allow excess to evaporate before starting
engine. To prevent FIRE, DO NOT start the engine while the smell of fuel
hangs in the air.
Carburetor
Assembly
Main Jet
Fuel Cup Seal
Mixing Tube
(might remain
inside carburetor)
Fuel Cup
Bolt Seal
Bolt
Drain Bolt
Washer
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