Prop Shaft grounding wiper

[BillD]

A few weeks back a couple of members were asking about "shaft wipers" for grounding a prop shaft.

I remembered that Tony out @ Seaboard Marine uses the wiper in some repowers and new builds.

Here's a couple of pics of a prop shaft wiper.

 

[WoundUpMarine]

Travis posted up a link to a shaft brush a long while back, I'm sure he will chime in with something soon. Seems like you can't go wrong with having them. I'll put one on when I redo my deck and grounding system.

 

[F/V First Team]

Ding dong
oh wait, that wasn't a chime
Dang it...

Wiper, brush, drag, they all do the same thing

 

[cb34]

Shaft grounding

Looked into this myself, and question if they are necessary. If the motor is grounded correctly and the motor is in contact with the shaft the shaft should be protected.

 

[F/V First Team]

Transmission is in oil, oil is a poor conductor, that's the break in the chain.

 

[cb34]

ground

Please clarify, motor and gear case grounded. Shaft attached to gear case. How does tranny oil effect?

 

[BillD]

simple enough to make one up.

 

[F/V First Team]

Unless you've grounded out the coupling, hard to do because once it starts to spin it's going to tear the cable out and really mess things up, then there is a film of oil separating the shaft from the case itself. The bearings and such that support the inner workings are in an oil bath so that the metal surfaces aren't touching each other. Without this oil things wouldn't spin so smoothly...

 

[samhop]

so assume that the brush arm or the alum gear mounting bracket is tied to the grounding system because most soft mounts will eclectically isolate whatever is mounted with them.

 

[BillD]

so assume that the brush arm or the alum gear mounting bracket is tied to the grounding system because most soft mounts will eclectically isolate whatever is mounted with them.

Correcto !