Storage oil prevent corrosion in exhaust?

[scooper77515]

Just put the boat up for the winter, and did the spray-in corrosion oil. Did it for just a minute WITHOUT putting the boat on the hose. It was 45 degrees outside so I didn't think the engine would overheat, and the exhaust never got too hot to hold on to. Ran it long enough to burn the gas out of the system with the the gas valve OFF. Then shot into the cylinders.

Anyway, will this oil go through the system and line the exhaust tube in a way to prevent any further corrosion on the aluminum exhaust tube? Especially more so since I did it while running the engine dry?

I don't want those plugs to rust out in the bottom like they were on my XP when I got it after years of water sitting in the bottom.

 

[scooper77515]

Anybody? Any idea?

 

[rookie101]

If you were seeing more smoke from the exhaust than normal, I would think that there will be at least some residue left inside the pipe to help protect it from corrosion.



Aaron

 

[6KJR]

Are you talking about the waterbox in the rear of the machine?

 

[scooper77515]

I am talking about what I used to call the Expansion Chamber on my old mini-bike. The lowest part in the exhaust, that hooks to the larger front colored part. (purple). Actually, both of those purple parts.

On my xp, when I got it, one of the welded bungs had rusted through and was slowly leaking water into the hull. So I drilled, tapped and put in a stainless bolt, then expoxied over both inside and out. 2 year later (yesterday)I pulled it off and checked my work and it is still holding up just fine.

It just seems that the material gets thinner on the bottom part over the years from corrosion. I was hoping that "smoking it out" with the winterizing lube spray would slow that corrosion down so I don't have to swap that part out eventually.

 

[scooper77515]

When I first got the XP, it was leaking through one of them so I hit them all with a hammer and punch, and 2 of them broke through (the bottom ones, of course). So I drilled and tapped a hole, maybe 3/8" or so, used 2-part epoxy as "lok-tite" on a short stainless bolt, ran it up, and then filled the indentation in on the inside with more epoxy.

Then when I swapped the motor out on my Challenger this summer, I did the same thing, but there was still plenty of material when I punched on it, so I just filled the dimples on the inside with the epoxy. (cleaned it down to bare metal first, then filled them flush with epoxy)

This week, when I took the exhaust off the XP to get to the leaky oil line, I checked up on the epoxy/bolt setups and they are holding up just fine.

So, quick, cheap fix, seems to be holding on well enough....

Anyway, when I got the XP, it was sitting inside a house on the beach down in the garage under the house on stilts. This was next door to my parents' house in Surfside TX, where IKE hit a few weeks back. Well, the XP was tied to the trailer by a rope, and over the past 10 years, has floated around inside that garage chained to one of the stilts, in several feet of salt water each time a storm hit, holding the trailer up with it. I know it had salt water in the exhaust, because the previous owners rode it ONLY off the beach, and never did any maintenance or cleaning, so whatever was in it stayed in it until I opened it up and drained it out. They would get it fixed in the spring, ride it for a day or two, then it would stop running, and back to the garage. This went on for about 3 years, then they lost interest in the beach house and the ski sat there for several years until the owner offered to give it to me, because he saw my Maverick running and figured I was good at fixing mechanical things.

Anyway, again...long story longer...YES it was from salt water sitting in the bottom, and I want to minimize similar damage from occurring on my boat.

PS--when I took the exhaust off this time, there were HUGE salt crystals in the bottom of it. They were pretty cool looking. Maybe half a cup of salt in there. All growing out of the bottom. The XP is still primarily driven off the beach, and even though we rinse and flush it after each use, it still has salt crystals growing in it. (yes, it just looks like sand and gravel, but much of it is salt crystals)

 

[scooper77515]

Now that the XP is mine, it gets taken out of the water after each use. We still keep it on the island where my folks live, but it comes inland to my house during the storms, so no more flooding with salt water.

I take quite a bit of care of it now that I own it. Unlike the previous owners.

The inline valve...good idea, and I did that on my Challenger, and it (the Challenger) also has the zinc anodes, even though I use the Challenger in fresh water only.

If there was enough left of this XP I would do it. Maybe if I end up getting a new engine, which will likely happen soon, the way the current one is ate up and corroded, and with an unknown number of hours on it.