0438798 JOHNSON CARB. ASSY., Stbd., 150GL, 150SL

Use a suitable container to catch any fuel that might spill. Clean up any spilled fuel immediately.
Do not allow dirt to enter the fuel system. Thoroughly clean the area around a fuel system component that will be disconnected. Fit a suitable cover over disconnected fuel system component.
If the fuel system runs out of fuel or if air is introduced into the fuel system the following procedure may be followed.
Turn the ignition switch to the "OFF" position.
Fill the fuel tank(s) with clean diesel fuel.
Illustration 1 g00474457
Typical example (1) Air purge screw (2) Fuel priming pump (IF EQUIPPED)
Open air purge screw (1) for three full turns. Do not remove the air purge screw.
Do not crank the engine continuously for more than 30 seconds. Allow the starting motor to cool for two minutes before cranking the engine again.
Crank the engine for 30 seconds. Use a suitable container to catch the fuel while you crank the engine. Allow the starter motor to cool for 2 minutes.Note: After four or five cranking intervals, most of the air should be purged from the system.
Crank the engine for 30 seconds. Allow the starter motor to cool for 2 minutes.
Repeat Step 5 until the engine starts and runs. If the engine runs rough, continue to operate the engine at low idle until the engine runs smoothly.
Observe air purge screw (1). When a small drop of fuel appears at the threads of the air purge screw, close and tighten air purge screw (1) .Note: Failure to tighten all fittings could result in serious fuel leaks.
Clean any residual fuel from the engine components.
Once the engine runs smoothly, stop the engine. Turn the ignition switch to the OFF position.Note: You may use the hand priming pump for the fuel filter (if equipped) instead of starting engine and running the engine. Perform the following procedure when the hand priming pump is used:
Illustration 2 g00474457
Typical example (1) Air purge screw (2) Fuel priming pump (IF EQUIPPED)
Open air purge screw (1) for three full turns. Do not remove the air purge screw.
While you operate the hand priming pump, observe air purge screw (1). When a small drop of fuel appears at the threads of the air purge screw, close and tighten air purge screw (1) .Note: Failure to tighten all fittings could result in serious fuel leaks.
Clean any residual fuel from the engine components.
Continue to operate the fuel priming pump until a strong resistance is felt. Listen for an audible click from the fuel manifold. The click will indicate that the valve has opened and the fuel system is pressurized. Lock the fuel priming pump.
Do not crank the engine for more than 30 seconds. Allow the starting motor to cool for two minutes before cranking again.
Crank the engine. If the engine starts but the engine runs rough, continue to operate the engine at low idle until the engine runs smoothly.Note: If the engine will not start, further priming is necessary. If the engine starts but the engine continues to misfire or smoke, further priming is necessary.