Removing The Cylinder Head; Disassembling The Cylinder Head; Checking The Valve Lifter - Yamaha F150A Service Manual

Removing the cylinder head

1. Remove the valve lifters "1".
TIP:
Make sure to keep the parts in the order of
removal.
1
2. Remove the cylinder head "1".
Do not scratch or damage the mating sur-
faces of the cylinder head and cylinder
block.

Disassembling the cylinder head

1. Remove the intake and exhaust valves.
TIP:
Make sure to keep the parts in the order of
removal.
Valve spring compressor "1": 90890-04019
Valve spring compressor attachment "2":
90890-06320

Checking the valve lifter

1. Check the valve lifters. Replace if dam-
2. Measure the valve lifter outside diameter
1
Valve lifter outside diameter "a":
7-40
2
1
aged, scratched, or worn.
"a".
a
30.970–30.980 mm
(1.2193–1.2197 in)
Cylinder head