TOHATSU MFS 4 Service Manual

5-14
Power Unit
4st 4/5/6 2011
1. Disconnect plug cap 1 connection, and then, remove
spark plug and cylinder head cover 2.
11
2
2
3
a
b
2) Inspection of Valve Clearance
44
c
d
c
d
2. Pull recoil starter 3 to turn flywheel clockwise until flywheel
“T” mark
a is brought to cylinder mark b.
3. Check clearances of intake valve c and exhaust valve d.
Adjust gap if it is out of specified range.
· This step brings piston to top dead center of
compression stroke.
· The compression stroke can be known visually
when fuel pump is removed. Projection mark
4 on the cam shaft is seen in this stroke.
· The piston is at top dead center of
compression stroke when flywheel mark and
cylinder mark “T” are aligned with each other.
Valve Clearance (when engine is cold) :
(IN) Intake Side c : 0.06 - 0.14 mm (0.0024 - 0.0055 in)
(EX) Exhaust Side d : 0.11 - 0.19mm (0.0043 - 0.0075 in)
Perform inspection and adjustment of valve
clearances when engine is cold.
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TOHATSU MFS 4 Specifications

General

Brand	TOHATSU
Model	MFS 4
Category	Outboard Motor
Language	English