If these outboard engines have run in saltwater every day for two years, will there be rust inside?
Outboard Engine in Saltwater: Rust in the Water Jacket?
Q: Hi Paul Here from Australia I was just reading about what happens if you drown your outboard in salt and its relevent to my questions
I have the opportunity to purchase a 2008 50hp 4 stroke yamaha, my concern is its been sitting on the back of a boat for the past 2 years in salt water, the motor is used daily and tilted after use so its not sitting in the water all the time. My concern is that it hasn't been flushed in that time and I am worried about rust that may have formed in the water jackets. I asked the guy about this and he said that it wasn't a problem as the water in the motor wasn;t in contact with air, but I am very skeptical Whats your thoughts, any help would be appreciated. I am set to travel 650klms tomorrow to take a look at it but I am in 2 minds to go Apparentyly the motor functions fine and is in good condition Cheers Paul
A: Hey Paul - internal rust isn't the most likely problem, although I would expect that after two years you'd find some corrosion under the cowl. A good, long look at the exterior of the powerhead (wiring, connections, all metals) will let you know. Obviously, if you see a lot of corrosion, moving on would be the best move. More relevant, however, is the cooling system. Commonly an engine that hasn't been flushed for a long period of time will have clogged passages and/or the water pump impeller will be trashed. I'd pay close attention to the strength of the flow of the tell-tail (where the motor "pees" out the back) and if it was weak, I'd want the seller to have the impeller replaced before making a purchase. If he did so and after replacement the flow was still weak, I'd have serious concern that the internal water passages were clogged up, and more significant repairs could be involved. Good luck - enjoy!
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