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Flywheel removal/installation1987-1993 Mercury Mariner 70/75/80/90/100 and 115HP motors

Removal

1. Remove flywheel cover from engine.
   WARNING
   Engine could possibly start when turning flywheel during removal and installation therefore, disconnect (and isolate) spark plug leads from spark plugs to prevent engine from starting.
2. Disconnect spark plug leads from spark plugs.
3. While holding flywheel with Flywheel Holder (91-52344), remove flywheel nut and washer.

   

   a - Flywheel Holder (91-52344)
4. Install Crankshaft Protector Cap (91-24161) on the end of crankshaft, then install Flywheel Puller (91-73687A1) into flywheel.
5. Remove flywheel.
   NOTE: Neither heat or hammer should be used on flywheel to aid in removal as damage to flywheel or electrical components under flywheel may result.

   

   a - Flywheel Puller
   b - Flywheel

Installation

1. Disconnect spark plug leads from spark plugs.
2. Place flywheel key into slot in crankshaft.

   

   a - Flywheel Key
3. Align slot in flywheel center bore with flywheel key and install flywheel onto crankshaft.
4. Install washer and locknut.
5. Hold flywheel with Flywheel Holder (91-52344)
   torque locknut to 120 lb. ft. (162.7 N-m).

   

   a - Flywheel Holder (91-52344)
6. Install flywheel cover.

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Updated on: Saturday, November 21, 2020