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Electric Yacht Copyright 2012
Open Water Checkout:
1. In protected water with light to no wind and minimal wave action, slowly
advance the throttle to full throttle and let the boat accelerate until running
at a constant speed.
2. Observe the battery current.
a. If it is at least 350A, you have a good match between your
reduction ratio and your propeller.
b. If it is less than 350A and the motor speed is over 2900RPM
(ME1012 motors or ME1114) or less then 350A and over 1900RPM
(ME0913B motors or ME1115), you have a little too much
reduction. As long as you are getting adequate performance, this is
fine. If not, you will need to replace the top pullies with the next
larger size. Contact us and we will supply.
c. If the maximum motor speed is less than 2700 RPM (ME1012
motors or ME1114 motors) or 1750 RPM (ME0913B motors or
ME1115 motors
), you don’t have enough reduction. This condition
will result in slightly reduced efficiency. It is not harmful, but it is a
recommended to replace the upper pullies with a smaller size.
3. Check the reverse performance. Due to differences in propeller efficiency
between forward and reverse, the current draw will likely be different.
4. If significant vibration is observed, loosen the top nuts securing the aft
mounting L-brackets to the jack screws. Gently bump the motor from side
to side and make adjustments to the jackscrew heights until vibration is
minimized. This should be done with the boat underway to avoid
excessive turbulence that can occur with the boat tied up. Some vibration
is normal. The electric motor is much lighter than a diesel/gas engine.
Therefore, any vibration due to turbulence, a slightly bent shaft, propeller
out of balance, etc will show up as vibration of the motor. Once vibration
is minimized, tighten the ½” nuts securing the front mounting feet to their
L-bracket. This should eliminate any significant vibration.
5. Install the cover and tighten the screws that secure it to the motor frame.
The motor system is now ready to operate.
State of Charge (SOC) Alarms:
The display will emit a beeping sound when the battery SOC reaches 50%, 20%,
10% and 5%. At 5% it will continue to beep until all power is depleted or the
motor is turned off. At the other percentages, it will beep at 10 second intervals
for 1 minute.
