TOHATSU MFS 4 Service Manual

5-38
Power Unit
4st 4/5/6 2011
30˚
45˚
60˚
11
45˚
a
30˚
b
a Carbon build-up or uneven surface.
b Width before correction
60˚
b
35) Correction of Valve Seat
1. Use valve seat cutter 1 (commercially available item) to
correct valve seat.
2. Turn 45 degree cutter clockwise to cut valve seat surface
to make it smooth.
3. Use 30 degree cutter to adjust contact position of valve
seat upper end.
Be careful not to over-cut valve seat. Turn valve
seat cutter while pushing down evenly.
4. Use 60 degree cutter to adjust contact position of valve
seat lower end.
b Width before correction
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TOHATSU MFS 4 Specifications

General

Brand	TOHATSU
Model	MFS 4
Category	Outboard Motor
Language	English