Have question about old Mercury engines

[Sailor77.7]

I have a 1969 Mercury Thunderbolt 800 2 stroke. I was told that this engine is primarily supposed to be used in fresh water. It was not intended for salt water use. As such, it will go to pot quickly and basicly self destruct then my only option will be to replace it with a new engine. A few guys who work around engines said this.

I would like to know what the old salts on here, who know more than most have to say about this. Is it a true statement? Is it not meant for saltwater use or is it ok to use in saltwater as long at it gets flushed out after use? What are the pro's and cons of using it this way?

Sincerely,

sailor77.7

 

[WillyBWright]

Re: Have question about old Mercury engines

As long as it's trailered and not moored, you should be okay as long as it's thoroughly flushed after every use. I think the only sacrificial anode on it is the trim tab above the prop. Keep it fresh with a wire brush and don't paint it. Keep the steering and tilt pivots well greased at all times. Prosphaft too.

 

[Silvertip]

Re: Have question about old Mercury engines

You should have posted this question in the Mercury Outboard forum.

 

[Texasmark]

Re: Have question about old Mercury engines

Back in '65is I was in a Merc dealer (on the gulf coast) and a lower unit was sitting in a vise. The driveshaft was apparently made of carbon steel rather than the SS that they have been using for a long time now.....don't know when they came to their senses.

The driveshaft looked like a person with well advanced skin cancer. I doubt that the water pump could be serviced with the driveshaft in that level of deterioration.

So, if that is what people refer to as not acceptable for salt water use then I totally agree.

Mark