If a fuel injected outboard model stalls, experiences
idling problems or difficulty starting, or has throttle
position sensor (TPS)/ electronic throttle valve (ETV)
trouble codes, check the throttle valve. A dirty throttle
valve can cause the above listed symptoms and it is
important to inspect and clean the ETV/ throttle body
every 100 hours or during the unit’s yearly service.
WARNING! Always turn off the power before working so that
your fingers do not get pinched.
Inspection and cleaning of ETV models
2. Move the throttle valve by hand and check that it
moves smoothly.
• If movement is sluggish, wipe it off with a cloth
and clean it.
• If cleaning does not improve the operation,
replace the throttle valve.
• Confirm that the output voltage of the TPS
is normal.
Inspection and cleaning of throttle body models
1.Inspect the exterior of the throttle body.
• If it is damaged, replace it.
• If any oily residue or debris is present, gently
wipe out the throttle body with a cloth to
clean it. Do not use any solvents to clean these
components. Be sure to not let any debris fall
into the intake while wiping out the component.
• Clear the trouble codes, then confirm TPS output
voltage is within the correct specifications.
2. Disconnect the throttle cable, move the throttle
valve by hand, and check that it moves smoothly.
• If movement is sluggish, wipe it off with a cloth
and clean it.
• If cleaning does not improve the operation,
replace the throttle valve.
• Confirm that the output voltage of the TPS
is normal.
NOTE: Do not attempt to clean the idle speed
control (ISC) valve.
NOTE: Service procedures must be performed
following the instructions in the applicable
Service Manual.