Mercury 20 EFI FourStroke

15/20 EFI FourStroke, Manual Start, Manual Tilt
1 - Injector #1
2 - Injector #2
3 - Idle speed control valve (idle air control)
4 - Vapor separator tank/high‑pressure fuel pump
5 - Temperature and manifold absolute pressure
(TMAP) sensor
6 - Throttle position sensor (TPS)
7 - Engine coolant temperature (ECT) sensor
8 - 20‑amp fuse (not used)
9 - Not used (weather capped)
10 - Stator
11 - Stator yellow and white wires (not used)
12 - Not used
13 - 15‑amp fuse (not used)
14 - Cowl‑mounted start switch (not used)
15 - Not used
16 - Tiller models: Tiller handle stop push button
17 - Tiller models: Tiller handle E‑stop switch (lanyard
operated)
18 - Tiller models: Tiller handle 14‑pin harness connector
19 - 14‑pin connector for remote control/tiller harness
20 - Crankshaft position sensor (CPS)
21 - Warning horn
22 - Diagnostic connector
23 - Ground (coil bracket)
24 - Ground (cylinder block)
25 - Ignition coil ground
26 - Ignition coil power
27 - Oil pressure sender
28 - Warning light (power)
29 - Tach signal
30 - Warning light (signal)
31 - Engine control module (ECM)
Color Diagrams
Page 9A-4 © 2018 Mercury Marine 90-8M0125265 eng NOVEMBER 2017