812767A 1 Mercruiser BEARING ASSEMBLY, Tapered Roller

Fuel Air Ratio Control and Governor Check
Table 1
Required Tools    
Part Number     Part Name     Quantity    
2W-9161     Manual Shutoff     1    
6V-4186     Fuel Pump Timing Pin     1    
6V-6070     Governor Adjusting Tool     1    
0S-1614     Bolt     1    
9S-0229     Contact Point     1    
9U-7400     Engine Set Point Indicator Group     1    
FT-1906     Air Test Kit     1    
8T-1000     Electronic Position Indicator     1    
4N-5656     Cover     1    Note: The governor seals do not need to be cut or removed for the procedures that follow. For more information on the tooling, watch Video Tape, SEVV9173 and Special Instruction, SEHS8463. This Special Instruction is available only on microfiche.
Install the rack position indicator in order to measure the movement of the fuel rack.
Turn the ignition key to "ON". This activates the shutoff solenoid. DO NOT START THE ENGINE AT THIS TIME.
Move the governor control linkage to the full FUEL-ON position. Hold the governor control linkage in this position, or fasten the control linkage in this position.
Install the 6V-4186 Fuel Pump Timing Pin in the hole for the rack's zeroing pin inside the pump housing.
With the governor control lever in the full FUEL-OFF position, use a 1N-9954 Lever to slowly move the manual shutoff shaft, if equipped. Move this manual shutoff shaft to the FUEL-OFF position. This moves in a counterclockwise direction. Make sure that the 6V-4186 Fuel Pump Timing Pin drops into the slot in the fuel rack. Also, make sure that the pin engages with the slot in the fuel rack.
Release the manual shutoff shaft and the 8T-1000 Electronic Position Indicator. Press the zero button.
Remove the 6V-4186 Fuel Pump Timing Pin, and watch the movement. The electronic position indicator should display a positive reading in the "FUEL ON" direction.Note: If no movement occurs, repeat Steps 4, 5, and 6.
Release the governor control shaft and the governor control linkage.
Remove the air line from the engine. Put plugs over the opening. This keeps dirt out of the system.
Start the engine, and allow the engine to run for a minimum of five minutes. This warm-up time is required for the following reasons:
The governor gets enough time to attain normal operating temperature.
The engine gets enough time to attain normal operating temperature.
Personal injury can result from rotating and moving parts.Moving fan blades and moving parts will throw or cut any object or tool that falls or is pushed into them.Ensure that no one is working on, underneath or close to the machine before starting the engine. Ensure the area is free of personnel.
Illustration 1 g00320303
FT-1906 Air Test Kit (1) BL-6557 Connector (2) 5P-4405 Air Brake Connector (two) (3) 5P-6011 Tube (4) 5P-4476 Air Brake Connector (5) 6K-5741 Valve (6) 5P-4459 Air Brake Elbow (7) 7B-0192 Cross (8) 3B-6768 Bushing (9) 6V-7775 Air Pressure Gauge (10) 3B-3169 Hose Assembly (11) 6V-6757 Pipe Elbow (12) Flexible tubing with an ID of 6.35 mm (0.2500 inch) and a length of 1.2 m (4 ft) (13) Air pressure bulb Baumamometer
Check the leakdown rate of the fuel air ratio control with the engine at low idle. Follow these steps:
Connect the following items to the fitting that was left from the removal of the air line:
Pressure gauge
Shutoff valve
Pressure regulator
Air supply
Apply 70 kPa (10 psi) of air pressure to the fuel air ratio control.
Turn off the shutoff valve, and check the leakdown rate.Note: A leakdown rate of 20 kPa (3 psi) within 30 seconds is acceptable.
If leakage is more than 20 kPa (3 psi) within 30 seconds, the fuel air ratio control needs to be repaired before Steps 14 through 16 are completed.
Apply 70 kPa (10 psi) of air pressure on the fuel air ratio control for Step 12.Note: Step 11 also activates the fuel air ratio control for Step 12.
While the engine is operating at low idle, rapidly move the governor control shaft to the FUEL-ON position. Then, read the measurement on the 8T-1000 Electronic Position Indicator .
Press the "MAX" on the position indicator and then read the dynamic fuel air ratio control setting. Record the reading, and repeat this step several times.Note: The fuel air ratio control is activated, and the maximum reading is the dynamic full torque setting of the engine. This setting is 0.5 mm (0.02 inch) greater than the static full torque setting. The static full torque setting appears on the Engine Information Plate for later engines. This information can also be found in the TMI.Note: The fuel air ratio control activates at start-up for engines with a fuel air ratio control that is out of adjustment. At this time, the reading of the 8T-1000 Electronic Position Indicator can be the dynamic full torque setting for Step 17.
Release all the air pressure from the fuel air ratio control.
While the engine is operating at 900 rpm, rapidly move the governor control shaft to the FUEL-ON position. Then, read the measurement on the 8T-1000 Electronic Position Indicator .
Press the "MAX" on the indicator, and then read the dynamic fuel air ratio control setting. Record the reading, and repeat this step several times.Note: An adjustment is not needed if the dynamic fuel air ratio setting is within 0.25 mm (0.0098 inch) of the specifications in either of the following references:
The Engine Information Plate for later engines
TMIFor adjustment of the control, see the "Fuel Air Ratio Control Adjustment".
Observe these steps to check the inlet air pressure for full torque rack travel:
Connect the following items to the fitting that was left from the removal of the air line:
Pressure gauge
Pressure regulator
Air supply
Apply 25 kPa (4 psi) of air pressure to the fuel air ratio control.
Run the engine at 900 rpm. Rapidly move the governor control shaft to the full FUEL-ON position. Record the maximum reading on the indicator.
Repeat this process several times. With each repetition, increase the air pressure by 5 kPa