Reassembly Of Vapor Separator; Inspection Of Isc (Idle Speed Control); Inspection Of Idle Speed - TOHATSU MFS25 Service Manual

10) Reassembly of Vapor Separator

1. Attach float chamber to vapor separator.
2. Reassemble all parts that were removed.
Check that hose is reconnected correctly.

11) Inspection of ISC (Idle Speed Control)

1. Use diagnosis system to check operation of ISC (Idle Speed
Control) valve.
2. Disconnect hose at intake silencer side of ISC valve, close
the hole from which the hose was disconnected with a finger
to check if engine speed is reduced. Replace ISC valve if
not.

12) Inspection of Idle Speed

1. Start engine and run for 5 minutes to warm up.
Attach tachometer to high tension cord 1 to check idle
2.
speed.
More accurate and stable reading can be
obtained when tachometer lead is connected
with high tension cords of individual cylinders
linked with each other.
Tachometer :
P/N. 3AC-99010-0
Idle Speed :
RPM 850 ± 30 r/min
25/30 2006
4
1
4-33