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Old 08 April 2010, 03:25   #1
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Country: UK - England
Town: alton
Boat name: boat
Length: 5m +
Engine: tohatsu 70hp 2st
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Tohatsu 70hp wiring

I have just recent had to buy a new control box for my 70hp 2005 tohatsu. Unfortunatly the one i sourced was for a 30hp so the loom only had 5 wires but the original has more (9 or 10, for the rev counter etc). Does anyone know how the colour wires on a 30hp loom correspond to the larger 70hp one
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Old 08 April 2010, 04:10   #2
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Engine: Merc 60 Clamshell
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Can't help with the wiring colours, but as a thought, assuming you replaced it due to mechanical failure, could you swap the electrical innards across to the new box? These things are usually standard. You may need to move the lever too if its a PT / no PT job.

Alternatively do what I did with my Yam703 & move all the electrics into the console. Not a lot of use if it died electrically, of course!
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Old 08 April 2010, 05:55   #3
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On the 60C/70C, the tacho runs off a 2-pin male/female plug/socket, on a fly lead which plugs into the main loom near the control box. There's a separate loom from the motor for the trim gauge.
Does the loom on your new control box have the round 8-pin connector on the motor end? If not, then you'll probably have to change the entire loom. Not a difficult job, provided you have the parts, of course.

As 9D280 posted, what was wrong with the original?
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