Ken
HOLD THE FRONT PAGE!!! You should be using Mode 4 50% mix with that big beast, not Mode 3 - or it will turn itself inside out if you turn at full speed. Switch 1 OFF; Switch 2 ON; Pot R1 all the way anticlockwise.
FLJ
Thank you for your advice FLJ. I did turn the 'Pot' to remove motor buzz !!.
I wondered why she was swinging on the water. Such power with Mark's motors.

Mind you, the cost in amps will shorten sailing time.

After the weight test, I can now move up to 20 amp/hours
Nice quiet day today, running the railing wires around the deck.

Ken