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Location: Green Bay, WI | I would look at the wire you have for the 12-volt unit. If you do that math on both, using the rule-of-thumb numbers from that link I posted, they seem to be pretty close in terms of current draw.
55 lbs * 1.2 amp/lb = 66 amps
74 lbs * 0.9 amp/lb = 66.6 amps
So you might in fact be OK with your existing wiring. You just need to verify what gauge it is. But even if you'd have to replace all the wiring, it really shouldn't be all that expensive. I mean, compared to the price of the new motor and another battery (you may even want to install two new ones so they're the same age...), what's another $50 or so for new wiring? Unless the batteries are at the far end of the boat, you shouldn't need all that much wire--so it may not even be $50. | |
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