Yamaha 90 AETOL [86/204] Assembly and adjustment

5-15

POWR

ASSEMBLY AND ADJUSTMENT

G73000-0*

SMALL END BEARINGS AND PISTON

ASSEMBLY

1. Count the small-end bearing needles.

CAUTION:

Do not use a mixture of new and used bear-

ing needles in the same small end.

2. Using the special service tool, install the

bearings in the connecting-rod small

end and place washers on both sides.

CAUTION:

The washer should be placed with their

convex sides facing the piston.

Number of needles per small end: 28-pcs.

Small end bearing installer:

50, 60, 70 hp:

YB-6287/90890-06527

75, 80, 90 hp:

YB-6107/90890-06527

3. Insert the piston-pin into the piston.

4. Align the “UP” mark on the piston

crown towards the crankshaft's tapered

end. Install the piston in the connecting-

rod small end, insert the piston-pin,

then install new piston-pin clips.

5. Lubricate each bearing with 2-stroke

outboard-motor oil.