Bow thruster

[spike]

I know a lot of people think we shouldn't use these,but it was already on the boat. 

I have a nobels bow thruster that is squirting water into front cabin when in use. It's not leaking any other time. I have a manual that doesn't tell you much ,  and I am at a loss where to start to correct it. Any sensible pointers would be much appreciated.

[Stilllearning]

Hi, can you give some idea of where on the thruster the water is coming from, ideally without getting your front cabin too wet?

[Robbo]

2 hours ago, spike said:

I know a lot of people think we shouldn't use these,but it was already on the boat. .

Never go on what others think, go on what you think.  It's your boat.  Finding out where it's squirting the water from will help to diagnose.

[spike]

Have put the picture on again, but have marked where the water is coming from. 

We were only in dry dock last month and everything was ok then. Would really like to know if this is a diy job or is it best to get the professionals in. Have just been out for three weeks got back yesterday , so it might be 3 weeks worth of spray we've had to pump out. 

[WotEver]

I don't know this unit but it looks to me like the lump on the right bolts to the much bigger lump on the left. If so, is there a gasket between them that's failed?

[Tony Fuller]

HI

with the NOBELS Bow Thruster, the motor drives a cog wheel & chain ( which is inside the square metal box in the picture)

The Propellor is connected to a short shaft with a cog on one end driven by the chain

Where the shaft exits the box there is a bearing & a water sealing ring.

When you take the top off the box you will see the two cogs & the drive chain, the box should have a bit of grease in it but NO Water.

Try running the bow thruster with the top off the box.

If it fills up with water then the bearing/seal will need replacing.

Unfortunately this is a 'dry dock job' as I don't think that you can replace the seal without filling the boat with water.

I have Nobels (Dutch) contact details somewhere if you need to order spare parts.

Tony