Hi Mick
What a lovely tug !!!
That 4 blade prop will make the Brush motor work hard !!!
I tried a 540 80 turn one a 60mm 4 blade in a tug it got very warm !!!!
I was only running on 7.2 volts.
I had a lovely time in Brisbane but that was August last year.
I will stay down south for the summer in Tassie .
Harry