Pinion Clearance

Flywheel To Pinion Clearance:

Shimming Gas Engine Starter Motors:

1. Remove the lower flywheel housing cover.
2. Inspect the flywheel for signs of unusual wear such as chipped or missing gear teeth or the flywheel being bent.
3. Start the engine and gently touch the outside diameter of the rotating flywheel ring gear with chalk or crayon to show the high point of tooth runout after the engine is turned off. Turn the engine off and rotate the flywheel so the marked teeth are in the area of the starter pinion gear.
4. Disconnect the negative battery cable to prevent accidental cranking of the engine.
5. Measure the clearance between the top of the ring gear tooth and the bottom of the pinion tooth using the width of a wire gage or standard feeler stock. Normal clearance is 0.5 to 1.5 mm (0.02 to 0.06 inch).
^ Pinion must be electrically or mechanically engaged to make this measurement.
6. If clearance is less than 0.5 mm (0.02 inch), and the starter whines after firing, shim the starter away from the flywheel.
- Add 1.0 mm (0.04 inch) shims, one at a time, to both long bolts between starter mounting pads and the engine until the noise problem is corrected. Do not use more than 2 shims total.
7. If the pinion clearance is more than 1.5 mm (0.06 inch) and the starter whines during cranking, shim the starter toward the flywheel.
^ Add 0.33 mm (0.013 inch) shims between the outboard starter mounting pad and the engine mount until the noise stops. Do not add more than 4 shims total.
8. When shimming is done, tighten the mounting bolts.
Tighten
- Mounting bolts to 40 Nm (30 lb ft).