DRIVE SHAFT / PROPELLER SHAFT MODELS - 8D-590-823225--1 1096
Drive Shafts Modified to Shorter Lengths
The complete modified (shortened) drive shaft has to
be ordered from the boat manufacturer that installed
the MerCruiser Power Package.
IMPORTANT: Dana Corporation - Spicer Regional
Drive Shaft Centers will not shorten replacement
drive shafts for dealers or consumers.
If a boat manufacturer is currently having extension
drive shafts modified, they must be modified by one
of Dana Corporation - Spicer Regional Drive Shaft
Centers to maintain MerCruiser warranty. The modi-
fied drive shaft must meet the following specifica-
tions.
• U-joints aligned radially within 0° (± 1/2°).
• U-joints greased, after welding, with Quicksilver
U-Joint and Gimbal Bearing Grease.
• Assembly balanced to within 1.5 oz. in. (0.01
N·m) to 4500 RPM.
• Tube to have .005 in. (0.127 mm) to .010 in.
(0.254 mm) interference fit with tube yoke.
• Tube must be straight and round within .015 in.
(0.381 mm).
Installation
IMPORTANT: The following instructions are to be
used if ONLY the drive shaft was removed for ser-
vice. Refer to appropriate sections for installa-
tion of other components which require special
alignment.
1. Grease both drive shaft universal joints with
Quicksilver U-Joint and Gimbal Bearing Grease.
!
CAUTION
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.
!
CAUTION
Failure to properly align shaft flanges with
matching marks made on disassembly may
cause improperly aligned drive unit and exten-
sion drive shaft U-joint centerlines resulting in a
severe vibration problem.
2. As shown, attach drive shaft output flange and in-
put shaft flange exactly as marked upon disas-
sembly. Torque fasteners to 50 lb. ft. (68 N·m).
70237
a
b
c
d
e
Engine End Shown (Transom End Similar)
a - Output Shaft Flange
b - Drive Shaft
c - Screw 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
To Next Page
Loading...
