Question:

Why does the motor go about the same speed after 75 percent throttle? Can I get a faster prop for this trolling motor, without ruining the warranty? If I go on 75 percent throttle, about the same speed as 100 percent throttle, would it draw less amps? I wonder if it was just cavitation, after 75 percent throttle. How fast can the Seamax 2hp push to a 1000lbs boat?

I have a DC house 12v 100ah lifepo4 battery with built in BMS. Can I use LiFePO4 batteries with this system?

Answer:

If you cannot feel the speed difference when giving more throttle, then you can remain the 75% throttle to keep the boat and this 2HP electric motor with best efficiency. It could be the reason that your boat is heavy. Considering the physics formula E=M*V*V (E - Energy, M - Weight, V - Speed). It is normal that speed increase less than throttle increase.  Small motor factory only provide one standard prop. You may not be able to find more option of a prop from after market.

The AMP consumption is relate to the RPM and thrust output. The motor will use less power even same RPM but less thrust, for example when on land testing. Therefore, it is different from the traditional DC trolling motor. The motor spec is based on the testing when motor running in water.

Our website or product user manual has the Amp &Throttle chart to give you some idea of the power consumption. You may check from there to calculate your battery running time.

Base on the prop design, our chat also give the max speed based on a lightweight boat. It is hard to tell the max speed of many other boats. A boat water testing should be able to show the true number.

It is possible the motor having cavitation issue in some of the condition, for example the boat heavy, throttle speed increase fast, hit a strong current, prop not deep enough in water etc. You may hear a noisy water flow sound from the water when cavitation, then you may increase the throttle speed slower or adjust the motor shaft deeper.

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