Shaft Coupling Installation
Inspect the mating faces of the coupling flanges to be sure they are clean and have no nicks that will
prevent the couplings from mating properly.
Check to be sure that the coupling flanges are aligned by pulling the propeller shaft coupling against
the engine coupling. The shoulder on the shaft coupling should mate with the recess in the
engine coupling with minimum resistance.
Check the coupling flanges for any angular misalignment. Holding the coupling
flanges together by hand check for misalignment by trying to insert a 0.004” feeler gauge
between them.
Check the coupling flanges faces again after turning the shaft coupling 180 degrees. If the location of the
clearance gap changes 180 degrees, a bend in the shaft or a faulty coupling is indicated.
Insert and tighten the coupling bolts to a torque of 50 LB-ft. Successively tighten bolts is a cross pattern to
prevent warping a coupling flange.
Warning; Make sure that the battery cables are disconnected before proceeding to prevent
the possibility of anyone accidentally starting the engine and engaging it in gear.
Note: Final engine alignment must be done in the water and the fuel
tanks full.
Note: If the couplings do not mate properly, contact the service
department at Luhrs-Mainship Corporation for corrective action.
Note: If the coupling flange faces will accept a feeler gauge larger than
0.004”, contact the service department at Luhrs Corporation for
corrective action.
Total Task Time:
N/A
31-Open
Rigging Manual
Page:
10 of 15
