Questions about Engine Rust, Salt Use

[intrlaz]

I am looking at getting my first nautique and had a few questions about saltwater use. I am looking at an early 2000s SAN which has been used in brackish water for its entire life. I have read just about every post on this site concerning saltwater use, and wanted to get your opinions. Keep in mind I will be using the boat in brackish water as well. Trailer is not an issue.

There is corrosion on the engine mounts and some various spots around the engine, but the owner said he flushed with fresh water after every single outing. The rest of the boat backed up this claim as the boat is in good shape, interior and exterior. However, he is not the original owner. I was able to see some exhaust manifold rust, but nothing outrageous, and I did not crack the manifold drain plug to check for junk. From what I could see under the dash, just a small amount of oxidation.

There was some water in the bilge just sitting stagnant like is normal on boats, but personally I did not like this. Could this bilge water cause exterior engine rust?

I will likely change the manifolds and risers if I buy it, and will definitely take it to a mechanic to check out. I am simply trying to make a good decision considering I will be using in brackish also. I would hate to buy a well kept lake boat and destroy the resale value immediately.

Thanks

[Fatboy206]

RE: Questions about Engine Rust, Salt Use

intrlaz, there is a lot said on the subject but I will give you my two cents worth. Flushing out with fresh water after each use is key. While salt is more corrosive I accept, if you flush regularly soon after use your rig will go a long way. I don't keep my boat in the water when not in use so I know that is a big plus. Once I've hauled the boat home, a short drive from the slipway, I flush out the motor and mop out the few cups of water. Any residual water will naturally increase the humidity which is something you want to avoid. As far as superficial rust on the manifold or other bits is concerned, just apply anti corrosive oil spray and wipe off the excess which drips into the hull. Careful and regular upkeep and maintenance will keep you going for a very long time and not devalue the boat if you've done a proper job of it. Avoid spraying on to your serpentine belt.

[steve-o]

RE: Questions about Engine Rust, Salt Use

I live in South La. where there is plenty of salt humidity and rain. People's boats last years and years down here without even doing the salt rinsing. Trailers on the other hand are the items that go. I don't run in salt (too many jellies around here), but nearly everyone I know with a boat does. Some don't rinse for a few days and other than some rust on manifolds and engine mounts, they are going on 15+ years with no problems. This is in the rust belt. Trailers, rigging, even bimini rivits, etc go after a time here, water pumps need replacing more often, T-stats, the usual, but the major engine components are still fine after years of use. The trailer is the major problem in a salt boat. I know that much WD-40, and rust spray is used.

[arondeau]

RE: Questions about Engine Rust, Salt Use

Do yourself a favor. Just buy another boat! Alot of boats out there. Stick with a frsh water boat! Not worth the aggrevation.

[east tx skier]

RE: Questions about Engine Rust, Salt Use

Even with a fresh water boat, it will likely have rust on the manifolds. The moisture and heat make quick work of the engine paint and surface rust follows. Other than a silicone lubricant, it's not worth worrying about. The manifolds will last a long time (with fresh water boats).

[intrlaz]

Re: RE: Questions about Engine Rust, Salt Use

Do yourself a favor. Just buy another boat! Alot of boats out there. Stick with a frsh water boat! Not worth the aggrevation.

I will be running in brackish, no question. Still pay up for a freshwater boat and kill the resale value in one season?

[arondeau]

RE: Re: RE: Questions about Engine Rust, Salt Use

Where are you going to be using the boat?