A 7/5 t (turn, windings) motor is still quite hot, which one are you going to get?
Still not knowing much about this but the little I have learned it you have to have the right size motor
and one that will give you the revs you require.
I'm guessing, you're going for a Speed 700 'size' motor which I think relates to the motor wattage,
(this is the same as saying a Speed500 is bigger and more powerfull than a Speed 400 motor), but I
haven't got the hang of how wattage relates to motor size ie. what's the Wattage of Speed 700BB
on 12volts? (Eg. Speed700BB motors range from 200-1Kw!)
The PRM of brushless motors is stated in Revs. / Volt ie. a 1000 r/v motor will in theory do 10,000 on 10volts.
Winding are also important.
Lower Turn = Higher Top End/Less Torque
Higher Turn = Lower Top End/More Torque
There are also two basic types of Brushless motor designs,
Inrunner ( conventional spinning armature )
Outrunner (case and shaft spin around a fixed bearing end plate.)
Good luck with selecting the right motor, there only about 10,000 so far to chose from!
TIP of the WEEK! Go to Youtube, do a search for brushless, find a boat similar to yours with a performance
you like, leave a comment asking what setup they are using (if it isn't already there), look up the spec of that motor!
I've learnt a lot of useful stuff this way!
RUNNING GEAR.
You might get away with using the supplied running gear in the boat and using a higher powered motor, it's worth a try!
If it fails, fit all metal running gear. (Make sure you have fixed flotation in the boat and canopy!)
Don't work about the shaft bearings at the moment, you're probably going to have to replace the solid shaft with a
flexy setup anyway.
Let know how it runs out of the box and keep us informed with progress Lee.