Inspection; Installation - Mercury MerCruiser MCM 454 Mag MPI Service Manual

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SERVICE MANUAL NUMBER 23

Inspection

1. Inspect splines in drive plate or coupler for wear.

2. Check flywheel ring gear for worn and missing teeth.

NOTE: If crankshaft is to be replaced, but old pilot bushing is to be reused, bushing can be

removed without damage by filling pilot bushing cavity with grease, then inserting an old

transmission input shaft in bore of bushing and hitting it with a hammer. This will create

hydraulic pressure in pilot bushing cavity which should force bushing out.

1. Clean mating surfaces of flywheel and crankshaft. Remove any burrs. Mating surfaces

2. Aligning dowel hole in flywheel with dowel in crankshaft, install flywheel. Torque bolts

3. Check flywheel runout as follows:

4. Install drive coupler or drive plate. Torque bolts to 35 lb-ft (48 Nm).

5. Install flywheel housing and related parts. Torque bolts to 30 lb-ft (41 Nm).

6. Install flywheel housing cover. Torque bolts to 80 lb-in. (9 Nm).

7. Install transmission (MIE). Torque bolts to 50 lb-ft (68 Nm).

8. Refer to SECTION 2 "Removal and Installation." Install engine.

90-861326--1 MARCH 1999

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must be clean bare metal.

to 65 lb-ft (88 Nm).

a. Attach a dial indicator to engine block.

b. Take readings around outer edge of flywheel. Push in on flywheel to remove crank-

shaft end play.

c. Maximum runout - .008 in. (0.203 mm).

.008 in. (0.20 mm) Max. Runout

Push Flywheel And Crankshaft Forward As Far As It Will Go When Taking

454 CID (7.4L) / 502 CID (8.2L)

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