Mercury MerCruiser MCM 454 Mag MPI Service Manual page 137

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SERVICE MANUAL NUMBER 23

Installation

Engine Installation/Alignment

ENGINE MOUNT ADJUSTMENT WAS NOT DISTURBED DURING SERVICE

Center lifting eye (located on top of thermostat housing) is used for engine align-

ment only. DO NOT use to lift entire engine.

Engine MUST be lifted with a lifting arm or damage to engine components will occur.

DO NOT allow lifting sling to hook or compress engine components or damage will

1. Attach a suitable sling to lifting eyes on engine and adjust so that engine is level when

2. Lift engine into approximate position (in boat), using an overhead hoist.

3. Set engine on stringers.

4. Grease 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 to each

other prior to tightening screws or screws may come loose during operation.

Failure to align shaft flanges with matching marks made on disassembly may cause

improperly aligned drive unit and extension drive shaft U-joint centerlines resulting

in a severe vibration problem.

5. As shown, attach engine output flange to drive shaft flange exactly as marked during

90-861326--1 MARCH 1999

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MCM MODELS - BRAVO AND BLACKHAWK DRIVES WITH DRIVESHAFT EXTENSION

suspended. (Refer to "Removal" section for location of lifting eyes.)

disassembly. Torque fasteners to 50 lb-ft (68 Nm).

Engine End Shown

Output Shaft Flange

Bolt 7/16-20 x 1-1/2 In. (38 mm) Long (4 Used)

Nut 7/16-20 (4 Used)

Matching Marks Made Upon Disassembly - Aligned

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