Thru Haul Assistance

We are having engine maintenance completed on our 480 cumming diesels. The mechanic contacted me saying I have a problem with my thru-haul bolts rusted. He told me the boat needs to be pulled out ASAP and repair. He did NOT give me a cost.

Has anyone had this issue and please comment on. Thank you.

You know what BOAT stands for, don't ya?

HappyHourSC said:

We are having engine maintenance completed on our 480 cumming diesels. The mechanic contacted me saying I have a problem with my thru-haul bolts rusted. He told me the boat needs to be pulled out ASAP and repair. He did NOT give me a cost.

Has anyone had this issue and please comment on. Thank you.

Click to expand...

I had to replace the ball valve/sea cock on the Waste System overboard pump out system. It was found while the boat was out of the water getting bottom paint, wax, etc, and I had to have an insurance survey performed. The ball valve was $210 and the Labor was $225.

Again, I was already out of the water, so the haul out and subsequent costs were buried in other parts of the bill.

Jaybeaux

Golfman25 said:

You know what BOAT stands for, don't ya?

Click to expand...

Absolutely know what it means but I like to get feedback . Thanks Captain.

I get a little bit of non-compute here………..Sea Ray uses either bronze or stainless steel fasteners on thru-hulls. Neither should rust on a 5 year old boat Stainless ones on my 450DA lasted at least 25 years and were sound when we had the boat surveyed for the new owner in April of this year. Stainless steel may have a bit of surface rust on it, but they should be solid and doing their job. But, if the boat is out of the water have them checked and replace them if necessary or see if the mechanic/boat yard isn't just looking for a $1200-$1500 payday.

While you are at it, have the bonding system checked and be sure the thru hull is bonded properly and rule out galvanic corrosion on the fasteners.

I was thinking along the same lines as Frank. Can you be more specific about exactly what thru-hull bolts we're talking about? I'd assume your mechanic is talking about below the waterline since he mentioned the need to pull it ASAP - but you know what they say about assuming... I try very hard not to be involved in the answer to that equation...

If you can add some more detail and, ideally, some pictures of the offending bolts, that would help.

In the end, if they are truly that bad, well, then, I guess they are. But there's likely a separate reason causing this as it's unlikely for the hardware, itself, to go bad "just because". The only thing I can think of, offhand, is also what Frank mentioned - galvanic corrosion - either an issue with your boat or possibly stray current/hot water.