In Low Speed Range - TOHATSU MFS25 Service Manual

O
Troubleshooting
K
State 3 Engine rotation is unstable or hunting occurs in low speed range.
Check throttle position sensor
and ISC valve connectors for
connections and resistances.
Normal?
YES
Check throttle link and
throttle valve for play and
wear.
Normal?
Check intake manifold for
air leak.
Normal?
Check ignition system
and/or fuel system.
9-14
YES
YES
NO
Repair or replace
defective parts.
NO
Adjust throttle link or
replace throttle body.
NO
Repair or replace
defective parts.
25/30 2006