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Tachometer pole settings:
TLDI: All models: 4-pole setting
4-Strokes:
8/9.8hp: 6 pole setting
9.9hp to 30hp: 12 pole setting
40hp to 250 hp : 4 pole setting
2-Strokes:
up to 40C: 4 pole setting
40D~90A: 6 pole setting
115~140: 12 pole setting
Of course, that info is in your Factory service manual.
As a dealer, I typically use the real Tohatsu tachometers.
Standard color codes: White is tach signal; red is 12v power; blue is instrument lighting; black is ground.
Looks like your tach may not work unless you can figure out a way to set it to 12 poles.
LG is tach light. I was thinking blue. I see blue under a lot of dashboards. Sorry.
The actual analog Tohatsu tach (in black) is:
Part #: 3NV726380M
List Price (MSRP): $125.00
Also available in white.
Again, all is in your Factory service manual. You definitely should get one.
Part #: 003-21054-3
List Price (MSRP): $65.00
The TOCS Digital Tachometer features large lighted buttons, chrome bezel, fog and scratch resistant coating , plug & play connectors and is LED back-lit for easy viewing at night/dusk. A user-friendly, intuitive design makes the menu easy to navigate. The TOCS multi-function tachometer connects to the CAN bus and communicates directly with the engine’s ECU. Engine data, fault codes and alarms are displayed on the LCD display (TLDI & MFS models only) and are visible even in direct sunlight.