Yamaha EF7000 - Breather Hose; Cylinder Head Decarbonization; Adjusting the Valve Clearance

2-12
CHK
ADJ
PERIODIC MAINTENANCE
BREATHER HOSE
1. Check:
9 Breather hose 1
Crack/damage → Replace.
Poor connection → Correct.
1
CYLINDER HEAD DECARBONIZATION
1. Remove:
9 Cylinder head
(Refer to “CYLINDER HEAD COVER,
CYLINDER HEAD” in 7VB-F8197-E0
chapter 3)
2. Eliminate:
9 Carbon deposits
(Refer to “CHECKING THE CYLINDER
HEAD” in 7VB-F8197-E0 chapter 3)
3. Install:
9 Cylinder head
(Refer to “INSTALLING THE
CYLINDER HEAD ASSEMBLY” in
7VB-F8197-E0 chapter 3)
ADJUSTING THE VALVE CLEARANCE
1. Remove:
9 Spark plug cap 1
9 Spark plug 2
NOTICE
Before removing the spark plug, use com-
pressed air to clean the cylinder head
cover to prevent dirt from falling into the
engine.
2. Remove:
9 Breather hose 3
9 Cylinder head cover 4
9 Cylinder head cover gasket
1
3
4
2