Yamaha F2.5A Service Manual page 135

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Good condition?
Check the compression pres-
sure of the combustion chamber.
Out of
specification?
Yes
Check the valve clearance.
Out of
specification?
No
Check the cylinder head, cylin-
der body, and piston assembly.
69M3E11
No
Clean, adjust or replace the
spark plug.
No
Check the fuel system.
Yes
Adjust the valve clearance.
Power unit
1
2
3
4
5
6
7
8
9
9-2

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