Checking The Oil Pump; Installing The Valves - Yamaha F50F Service Manual

POWR

Checking the oil pump

1. Measure the oil pump rotor clearances
as shown. Replace if out of specification.
Clearance a:
0.09–0.15 mm (0.0035–0.0059 in)
Clearance b:
Within 0.12 mm (0.0047 in)
Clearance c:
0.03–0.08 mm (0.0012–0.0031 in)

Installing the valves

1. Install a new valve seal 1 onto the valve
guide.
5-31
Power unit
1
E
2. Install the valve 2, valve spring seat 3,
valve spring 4, and valve spring retainer
5 in the sequence shown, and then
attach the special service tools.
NOTE:
Face the fine pitch side a of the valve spring
toward the spring seat.
Valve spring compressor 6:
90890-04019
Valve spring compressor
attachment 7:
90890-06320
3. Compress the valve spring, and then
install the valve cotter 8 using a thin
screwdriver with a small amount of
grease applied to it.
S62Y5590
6C13G11