TM 55-1945-205-24-2
0317 00 2
0317 00
2.
Start RHIB engine and run it, in gear, at idle speed for at least 3 minutes or until it reaches normal operating
temperature. (TM 55-1945-205-10-2)
NOTE
Observe the way the engine idles. If the air/fuel mixture is too lean, the engine will sneeze
and backfire. If the air/fuel mixture is too rich, the engine will run
rough and unsteady.
3.
Adjust the carburetor for too lean or too rich conditions as follows.
a.
To adjust a carburetor that is too lean, note the reference mark and turn the idle screw (2) 1/8 revolution
counter clockwise.
b.
Wait 15 seconds and repeat this procedure until the engine reaches the highest consistent RPM.
c.
To adjust a carburetor that is too rich, note the reference mark and turn the idle screw (2) 1/8 turn clockwise.
d.
Wait 15 seconds after each adjustment and repeat this procedure until you reach the highest consistent RPM.
4.
Repeat step 3 for each carburetor.
5.
Test the idle adjustment by running engine at a high throttle setting for 3 minutes.
6.
Return the engine to idle while still in gear. The engine should maintain a smooth idle.
7.
If the engine does not respond properly to these adjustments, check for the following conditions.
a.
Check carburetor linkage adjustment. (WP 0271 00)
b.
Check RHIB engine temperature. (TM 55-1945-205-10-2)
c.
Verify water is being discharged from cooling system port on lower unit.
d.
Check RHIB intake manifold balance passage. (WP 0318 00)
8.
Shut down the engine. (TM 55-1945-205-10-2)
9.
Install RHIB engine cover. (WP 0297 00)
END OF WORK PACKAGE
