MERCURY WIRING DIAGRAMS

The linked images are printable but may print across
more than 1 page (in order to be legible). Most models also have black-&-white-only
PDF files which will print the correct size on a standard sheet of paper
but require Adobe Acrobat or compatible PDF reader to open. Most diagrams are only listed
as PDF for the moment but all will eventually have color versions posted.

350 (2cyl)........MercElectric Ext. Harness.(page bottom.)     (PDF)
350 (2cyl).........MercElectric Int. Wiring Diagram     (PDF)
All 4 Cyl. (2 Lever control)........Ext. Harnesses A29645, A39125     (PDF)
All 4 Cyl. (1 lever control)........Elect. Starter Wiring Diagram     (PDF)
600-700-800 (Direct Reversing)......Int. Harness Connector (page top)     (PDF)
600-700-800 (Direct Reversing).......Elect. Starter & Ext. Harness     (PDF)
700-800-850 (Full Gear Shift)........Int. Conn. Color Code.(page top)     (PDF)
700-800-850* (Full Gear Shift).........Starter Wiring & Ext. Harness     (PDF)
          (*note: some use Merc 1000 type ignition system below)
700-800-850-1000 (Full Gear Shift)...Starter Wiring & Ext. Harness     (PDF)
950-1100.........Wiring Diagram & Ext Harness     (PDF)
950SS-1100SS.......Wiring Diagram & Ext. Harness     (PDF)
Mark 25E (Positive Ground)........Wiring Diagram     (PDF)
Mark 25E (Negative Ground)........Wiring Diagram     (PDF)
Mark 50E-55E (Postive Ground).....MercElectric Starting Wiring     (PDF)
Mark 75-78.........Internal & External Harness     (PDF)
Mark 75-78 (Elect. Starting).......Wiring Diag. & Ext Harness     (PDF)
Mark 75A-78A..........Electric Starter Wiring Diag. & Ext. Harness     (PDF)
Mark 75A-78A...........Internal Harness Connector (page bottom)     (PDF)
MercElectric Switches..........Ignition & Starter Types     (PDF)

Merc 7.5 & 9.8 (1975)..........Ignition Wiring  Rope Start  (IMAGE)
Merc 7.5 & 9.8 (1979-UP)..........Ignition Wiring  Rope Start  (IMAGE)
Merc 7.5 & 9.8 (1979-UP)..........Ignition Wiring  Electric Start  (IMAGE)
Merc 200 (1970-71)..........Internal & External Wiring   (IMAGE)  (PDF)
merc 200 (1972).............Internal & External Wiring     (PDF)
merc 200 (1973).............Internal Wiring     (IMAGE)
Merc 200 (Breakerless Ignition)..........Internal & (2)External Wiring Diagrams     (PDF)
Merc 200..........Internal & External Wiring Diagram     (PDF)
Merc 350 (MercElectric-2 Cyl.)........Internal & External Wiring Diagram     (PDF)
Merc 400 (2 Cyl.)..........Internal & External Wiring Diagram     (PDF)
Merc 402 (2 Cyl.)..........Internal & External Wiring Diagram     (PDF)
Mercury 4 Cylinder (Magneto).........Internal & External Wiring Diagram    (IMAGE)     (PDF)
Merc 45-50 (4-cyl) .....................Internal & External Wiring Diagram thru 1979 Rope Start   (IMAGE) 
Merc 45-50 (4-cyl) ..................... Wiring Diagram 1980-UP ROPE Start   (IMAGE)
Merc 45-50 (4-cyl) ..................... Wiring Diagram 1980-UP Electric Start   (IMAGE)
Merc 500 Thunderbolt..........Internal & External Wiring Diagram    (IMAGE)   
Merc 500 CD ignition 1976-78 Electric Start..........    (IMAGE)   
Merc 500 CD ignition 1976-78 Rope Start..........    (IMAGE)   
Merc 500S-650S (Breakerless).........Internal & External Wiring w/Ignition Driver    (IMAGE)     (PDF)
Merc 500SS-650SS (Breakerless).........Internal & External Wiring Diagram   (IMAGE)    (PDF)
Merc 650 (3 Cyl.)..........Internal & External Wiring Diagram     (IMAGE)    (PDF)
Merc 650-(800*)-850 Thunderbolt.......Internal* & External Wiring     (IMAGE)    (PDF)
        (* serial #'s 2991033-below; 3052381-3059821; and 3307347-up)
Merc 800* Thunderbolt.........Internal & External Wiring  (IMAGE)    (PDF)
       (*serial #'s 3051041-3052380 & 3144219-3192962)
Merc 950-1100.........Internal & External Wiring Diagram   (IMAGE)     (PDF)
Merc 950SS-1100SS........Internal & External Wiring Diagram   (IMAGE)     (PDF)
Merc 950-1000-1100-1250 (Breakerless).....Internal & External Wiring Diagram     (IMAGE)     (PDF)
Merc 1150-1350-1400-1500 Thunderbolt.....Ignition & External Wiring Diagram     (IMAGE)      (PDF)
MercElectric Switches........Starter & Ignition types thru 1969      (IMAGE)
Merc Model 900-1150-1500........1976-78 Wiring Diagram       (IMAGE)
Merc Models 50, 70, 90 3-Cylinder 1980's    (IMAGE)
Merc Model 70 HP........thru Serial # 5579016 Wiring Diagram       (IMAGE)
Merc Model 70 HP........from Serial # 5579017 Wiring Diagram       (IMAGE)
Merc Model 75 HP........from Serial # 6432901 Wiring Diagram       (IMAGE)
Merc 80 (4-cyl) .....................Internal & External Wiring Diagram S# 4391999 -5582561   (IMAGE) 
Merc 80 (4-cyl) .....................Internal & External Wiring Diagram S# 5582562-6432900   (IMAGE) 
Merc Model 90 HP -115 HP -140 HP.......1979 ONLY Wiring Diagram     (IMAGE)
Merc Model 90 HP -115 HP -140 HP.......1980 (Ser. 5594657) & up Wiring Diagram     (IMAGE)     (PDF)
Merc V6.......... Models ser # 4301235 to 5129480      (IMAGE)
Merc V6 Models 150 HP, 175 HP & 200 HP ser # 5124981 to 5363918     (IMAGE)
Merc V6 Models 150 HP, 175 HP & 200 HP ser # 5363919 to 5464484     (IMAGE)
Merc V6 135 1985-88, 150 1979-88, 175 1980-88, 200 1979-88, 220 CARB 1986-88   (IMAGE)