Hi guys a newbie here who has built a bait boat and is having problems with motor alignment, prop shaft and vibration.
so ive made a bait boat from scratch in 2mm ply, its approx 600mm long and 320m wide, its catamaran style and has two 540 motors that are attached to 10" long prop shafts by universal joint couplings, now the problem is this, I cannot get it to run quietly no matter what i do, ive spent hours fiddling and trying all different mounting options (on rubber mounts etc) but to no avail its sounds like a chainsaw revving over lol. so theres one thing ive noticed that some of the bait boat manufacturers do and that is to use a short prop shaft of around 4" or 5" and a straight coupler instead of a u.j. so my question is, if i was to remove my long shafts which run most of the length of the boat and replace them with ones half their length would i reduce the amount of vibration? if I put my hand around the shaft at present it quietens it down considerably, the vibration definitly seems to be coming from the shaft section and not so much the motor end. thanks for any advice anyone can give.