Installation - Mercury MerCruiser MCM 454 Mag MPI Service Manual

DRIVE SHAFT / PROPELLER SHAFT MODELS

Installation

IMPORTANT: The following instructions are to be used if ONLY the drive shaft was
removed for service. Refer to appropriate sections for installation of other compo-
nents which require special alignment.
1. Grease both drive shaft universal joints with Quicksilver U-Joint and Gimbal Bearing
Grease.
When attaching shaft in next step, BE SURE that the pilot on drive shaft flanges are
engaged in input shaft and output shaft flanges. Flanges MUST BE flush with each
other prior to tightening screws or screws may come loose during operation.
Failure to properly align shaft flanges with matching marks made on disassembly
may cause improperly aligned drive unit and extension drive shaft U-joint center-
lines resulting in a severe vibration problem.
2. As shown, attach drive shaft output flange and input shaft flange exactly as marked upon
disassembly. Torque fasteners to 50 lb. ft. (68 N·m).
Engine End Shown (Transom End Similar)
Index
Page 8F-8
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a - Output Shaft Flange
b - Drive Shaft
c - Bolt 7/16-20 x 1-1/2 In. (38 mm) Long (4 Used)
d - Nut 7/16-20 (4 Used)
e - Suitable Matching Marks Made Upon Disassembly - Aligned
CAUTION
CAUTION
a
e
d
c
b
SERVICE MANUAL NUMBER 23
70237
90-861326--1 MARCH 1999