US Marine / Mercury Force 90-125hp 2-Stroke CDI Wiring

I bought an old 90s Bayliner that had a Mercury (Force) Sport Jet 90hp engine (0E prefix serial number) and most of the wiring was corroded so I wanted to add all new connectors.

It was difficult to work out the current wiring configuration because the cables were either dirty or just hard to see so I spent some time searching for wiring diagrams which proved to be difficult as there are several variations of this engine some are CDI, some are CDM, some has a rev limiter etc.

My particular engine is a 3-cylinder CDI with no rev limiter, there are a pair of twin CDI controllers the front one (the left one in the photo) fires cylinders 1&2 and the rear (right in the photo) fires cylinder 3.

3-Cylinder Variants

TerminalCDI WireStator / Trigger Wire
1CDI2 BROWN/YELLOWSTATOR BROWN/BLACK/YELLOW
2CDI2 BROWN/BLUEN/A
3CDI1 BROWN/YELLOWSTATOR BROWN/YELLOW
4CDI1 BROWN/BLUESTATOR BROWN/BLUE & STATOR BROWN/BLACK/BLUE
5CDI2 WHITE/REDN/A
6CDI2 WHITE/GREENN/A
7CDI2 WHITE/ORANGETRIGGER CYL3 WHITE/BLACK/ORANGE
8CDI2 WHITE/YELLOWTRIGGER CYL3 WHITE/BLACK/YELLOW
9CDI1 WHITE/GREENTRIGGER CYL2 WHITE/BROWN/GREEN
10CDI1 WHITE/REDTRIGGER CYL2 WHITE/BROWN/RED
11CDI1 WHITE/ORANGETRIGGER CYL1 WHITE/BROWN/ORANGE
12CDI1 WHITE/YELLOWTRIGGER CYL1 WHITE/BROWN/YELLOW

Cylinder Variants

TerminalCDI WireStator / Trigger Wire
1(4)CDI2 BROWN/YELLOWSTATOR BROWN/BLACK/YELLOW
2(3)CDI2 BROWN/BLUESTATOR BROWN/BLACK/BLUE
3(2)CDI1 BROWN/YELLOWSTATOR BROWN/YELLOW
4(1)CDI1 BROWN/BLUESTATOR BROWN/BLUE
5(4)CDI2 WHITE/REDTRIGGER CYL4 WHITE/BLACK/RED
6(4)CDI2 WHITE/GREENTRIGGER CYL4 WHITE/BLACK/GREEN
7(3)CDI2 WHITE/ORANGETRIGGER CYL3 WHITE/BLACK/ORANGE
8(3)CDI2 WHITE/YELLOWTRIGGER CYL3 WHITE/BLACK/YELLOW
9(2)CDI1 WHITE/GREENTRIGGER CYL2 WHITE/BROWN/GREEN
10(2)CDI1 WHITE/REDTRIGGER CYL2 WHITE/BROWN/RED
11(1)CDI1 WHITE/ORANGETRIGGER CYL1 WHITE/BROWN/ORANGE
12(1)CDI1 WHITE/YELLOWTRIGGER CYL1 WHITE/BROWN/YELLOW

Leave a Reply

Your email address will not be published. Required fields are marked *