Tiller Handle Models; Throttle Only Operation; Neutral Safety Start Switch - Mercury 25 EFI Service Manual

Throttle/Shift Linkage

Tiller Handle Models

Throttle Only Operation

1. Rotate throttle handle to neutral.
2. Depress the throttle only button while rotating throttle handle grip to full forward. Release throttle only button.
NOTE: Engine throttle linkage should increase throttle opening. Gearcase should remain in neutral.
3. Rotate throttle handle grip back to neutral. The handle grip should stop in the neutral detent position.
4. Depress the throttle only button while rotating throttle handle grip to full reverse. Release throttle only button.
NOTE: Engine throttle linkage should increase throttle opening. Gearcase should remain in neutral.
5. Rotate throttle handle grip back to neutral. The handle grip should stop in the neutral detent position.

Neutral Safety Start Switch

Continuity Test
1. Remove the electrical bracket cover.
2. Disconnect both green neutral start safety switch bullet leads.
3. Test the neutral start safety switch for continuity in forward, neutral, and reverse gear.
DMT 2004 Digital Multimeter
Meter Test Leads
Red
Green
Removal
1. Remove the starter cable from the starter terminal.
2. Disconnect the neutral start safety switch harness leads.
3. Use a 19 mm open end wrench to hold the lower jam nut.
4. Use a 14 mm open end wrench to rotate the neutral start safety switch counterclockwise to loosen.
5. Slide the switch and actuator forward.
Page 7A-8
Black
Forward and reverse
Green
© 2016 Mercury Marine
a - Green neutral start safety switch bullet leads (2)
a
18955
91‑892647A01
Meter Scale
Ω
Neutral
Reading (Ω)
No continuity
0 Ω (Continuity)
90-8M0105568 eng MARCH 2016