TM 55-1945-205-24-20317 00 20317 002.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)NOTEObserve 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
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