hi,

i have a small boat 15X40cm which was originally a toy rc boat.
the electronics don't work anymore,so i'm thinking to convert it to a real rc boat.
i already have everything i need from other projects, the only thing is,i don't know what motor to choose.

here are some motors i have:

a 370 size motor,with 5:1 gearbox,
and a 180 size heli motor,
both brushed

batteries will be 900mah 3S

what would be a good overall motor for it?
it don't has to be a speed monster.