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Yamaha F150A - Removing the Cylinder Head; Disassembling the Cylinder Head; Checking the Valve Lifter

Yamaha F150A
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7-40
Cylinder head
Removing the cylinder head
1. Remove the valve lifters “1”.
TIP:
Make sure to keep the parts in the order of
removal.
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.
Checking the valve lifter
1. Check the valve lifters. Replace if dam-
aged, scratched, or worn.
2. Measure the valve lifter outside diameter
“a”.
1
1
Valve spring compressor “1”: 90890-04019
Valve spring compressor attachment “2”:
90890-06320
Valve lifter outside diameter “a”:
30.970–30.980 mm
(1.2193–1.2197 in)
2
1
a

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