I need your help.
Just bought a traditional full keel
with a cut away forefoot 44' 15 tons sailboat in May. Yesterday was the second time I took the boat
out. Used the bow thruster to starboard to help in getting out of marina.
When I came back in the afternoon, tried to turn to starboard to enter my berth, there was no response. I missed the entry.
At night I remove the v berth stuff, open the panel covering the motor
- there was strong burnt smell. The plastic cover melted on the side. Upon inspection
, I can see the right side aluminium L plate melted. This L plate connects the relay from the +12V house battery
supply to the motor
for MaxPower Series 100 (installed in 2003 in Fort Lauderdale
by PO) . The house battery
is supplied through a Plastimo
On/OFF switch at the bulkhead.
There are 4 studs on motor housing 2 poles for turning to starboard and 2 poles for turning to port. . The relay has 2 studs for +12v house battery. One for starboard and the other port side.
Disconnected the relay from motor by taking off the one L plate for port and a melted L plate for starboard.
Tested the Joystick, all the relays are working fine with a multimeter as well.
I use a thick cable to supply +12V to the +12V pole on the motor which gave a spark and no motor turning sound. Same result for the port side on the motor.
All this testing were done at night while motor is still warm.
This morning, I dived in the water
and check the blades in tunnel. Had some small growth, blades move easily with my hand turning it. I was expecting to see a rope
or plastic bag stucked inside. Nothing.
With better sunlight in the v berth I checked the motor now with supply +12V to the starboard and port terminals. Nothing. No spark. No motor turning. Use multimeter to test the 2 poles for starboard side. Open. Checked the port side. Open.
This unit does not have any sensor alarm
for heat/temperature that can cut the supply.
The relays is mounted on the side of the motor housing. I removed both the relays and motor housing.
I can easily turn the gear
on the top of the tunnel.
I took the motor and relays to the dealer in Singapore
who said he can't do anything except he suggested I buy a new motor.
Anyone can help me here with suggestion to see if I can recover this unit without spending another boat
My question is :-
1. Is a bow thruster such a delicate item? I only use it to turn into the marina 3 times. Twice the first time and yesterday once to get out. Please share your experience.
2. I find it strange the installation
did not include a breaker except from the mains battery a 300 amp fuse or a temperature sensor as alarm
or to cut the +12v supply until the motor cools down. The dealer said only the new models (which he did not carry any stock) have temperature sensor on the motor housing .
3. Now the motor 2 sets of winding are giving open circuit. What is the next best thing I can do?
4. After repairs/replace a motor, what can I do to prevent another incident like this one again?
Please share your comments, suggestion and experience.
Appreciate all your inputs.