Monofilament around shaft... how big of an issue?

[VitaminSea]

Was looking underneath the boat today to inspect the props, etc and noticed some monofilament wrapped around the shaft. Removed what I could using needle nose pliers and a knife. (It’s probably 10lb or so). From the last photo it appears there is still some around the shaft, but I am unable to remove due to the tight quarters.

No idea how long this has been here.

Can this pose and issue? What steps if any do I need to take?

 

[Dave burke]

I had a major problem two years ago and I posted how I did the repair (it’s in the FAQs).

In my case it was a ski rope and it cracked the white ring and almost sank the boat. I would say yours doesn’t look nearly as bad but it looks to me like the white ring has been repaired (look at the screw on the right side, looks to me like part of it is missing.

I would suggest you remove the impeller (it’s pretty easy to, lots of posts on this). Then you’ll be able to remove the monofilament and have a good look at the ring. If it looks ok and we’ll sealed, I’d leave it alone. Otherwise you may have to replace it which is a bigger job.

good luck.

 

[Scottintexas]

Probably no issue at all
Pull the impeller/shaft for easy removal

 

[VitaminSea]

@Dave burke thanks for the feedback.

Yeah, the boats a ‘12 and I am the second owner, (second season with it). So I am not certain. I had a few different photos, as that was the only way I could see what was going on up there. Here’s another one. Looks like the screw is intact to me.

I will have to look for your post. How long of a project is removing the impeller (assume proper tools).

 

[Dave burke]

Here’s the thread: https://jetboaters.net/threads/repa...-a-rope-being-sucked-into-the-impeller.18078/

Lots of help from many people to figure this out. As I said, and you can see clearly that my white ring was pretty damaged. I think you’re probably ok but I would take off the impeller and shaft. Only 4 large bolts hold it in place from what I remember. And you have to disconnect some linkages I think. Also pretty easy.

All I remember using was a socket wrench and some needle nose pliers to remove the impeller. If you need more details, do a search on “impeller removal” as I don’t think I had much detail in my post.

Once you get it out, you should be able to easily remove the line and also have a good look at the white ring.

 

[Scottintexas]

You've not experienced any issues,
This is probably just an aesthetic issue
Dave burkes is was an unusual situation

Pulling your impeller is a 15 minute job once you start working,
4 bolts on the pump and steering cable bolt and reverse cable fitting,
We should have tip in the faq or YouTube

 

[Scottintexas]

 

[VitaminSea]

Thanks. Great video! I will have to see if tomorrow affords me the opportunity to make it back to the boat and attempt this.

So the end of the shaft just sits inside a female coupler? The video didn’t cover that part and just showed removing it and then sliding it back. Is there something to check/confirm as your start the reassembly process?

 

[Scottintexas]

There is no attachment for the shaft

You may have to wedge or pry the housing loose, sometimes it slides straight out other times i have to pry/wiggle it out,
The same going in, if the splines aren't perfect you may have to slightly rotate the impeller

 

[Julian]

With as little as is left, I would just cut it off and confirm she runs fine with no leaks and be done.

 

[VitaminSea]

Pulled the impeller. Glad I did. There was more fishing line than I anticipated.

 

[tdonoughue]

While you are there, inspect the impeller. Also, a good time to see that your intake path is smooth and you are not missing a bunch of silicone. Also a good time to look at the wear ring for scrapes...

 

[Dave burke]

The white plastic ring looks in good shape. Other than doing as @tdonoughue suggests, I think you’re good to go.

 

[WREKS]

The white plastic ring looks in good shape. Other than doing as @tdonoughue suggests, I think you’re good to go.

@Dave burke, @tdonoughue How does the plastic ring keep the shaft from leaking? Does it have an o ring or seal inside of it?

 

[VitaminSea]

While you are there, inspect the impeller. Also, a good time to see that your intake path is smooth and you are not missing a bunch of silicone. Also a good time to look at the wear ring for scrapes...

impeller was in good shape. I was checking the intake & applying silicone on the intake grate bolts when I found the monofilament last week.
Wear ring? Where is that?

 

[Dave burke]

@Dave burke, @tdonoughue How does the plastic ring keep the shaft from leaking? Does it have an o ring or seal inside of it?

Answer is a bit complicated and unfortunately I learned from experience. Check the post #5 above if you want more details.

Short answer is that it’s just a sleeve connected to a hard rubber hose which is in turn connected to the shaft housing. To ensure there’s no leaking, the white plastic ring/sleeve needs to be sealed with silicone and screwed into the hull and then the ring clamps around the rubber hose (it’s only about 6 inches long) need to be tight. Mine leaked because the ring cracked and the seal against the hull was broken.

 

[WREKS]

@Dave burke So if the white ring is not meant to seal, then water can easily get to the splined coupling between the impeller shaft and intermediate shaft. I think I read in one of the forums about using waterproof grease for the splined connection to prevent having future problems separating the two shafts.

 

[Dave burke]

The waterproof grease is probably a good idea, as you say it would make it easier to separate the shafts.

To be clear, I think white ring is meant to seal the opening in the hull, and make sure water doesn’t get beyond the shaft housing and into the boat.

 

[tdonoughue]

I agree. If I recall correctly (which is questionable, of course), the white ring connects on the inside to that short section of rubber hose that leads to the bearing/seal. So it does not seal anything, but if you were to melt it by rubbing it with, say, a lump of monofilament, then you could cause a leak...

Fortunately, that was averted here. A win.

 

[VitaminSea]

@Scottintexas @Dave burke @tdonoughue

thanks for all of your feedback here, and for giving me the confidence to tackle this! ?