Engine rust

[dmksails]

I'm cleaning up the rust on my engine - see attached. The engine has spots of rust as shown. The engine mounts are particularly bad.

Do I need to remove all the rust, or just use a brass brush to remove the loose particles before brushing on a rust inhibitor?

Suggestions for what to use after cleaning the surface?

[JPA Cate]

dmk,

I'm wondering where all that salt water's coming from. Does your water strainer leak? or maybe the water hoses, or even the water pump?

It just might be time to replace those engine mounts, the boat's pretty old, now, and they may be original, that's a a lot of cycles on them. Any idea how many hours on them? Or, have they already been replaced, shortly before you got the boat? If so, then your water leak is of more recent origin.

Ann

But yes, clean up the rust with the wire brush, brush on rust converter, and paint. It will look somewhat better.

[Lepke]

When I clean up rusted metal, I primer with cold galvanizing spray, then the finish paint. Lasts a very long time.
To remove rust, if the part can be soaked or submerged, I use a product called Archoil AR5100. Mixes with water 16:1 and removes rust down to the base metal without harming plastic, rubber, etc. Appearance is similar to sandblasting. For soaking, I use cotton caulking, saturated with the mix and wrap or place on top of the object needing rust removal. PDF can be found here: http://www.archoil.com/wp-content/up...2/AR5100-1.pdf
Too big for cruisers.
I also use their diesel fuel and oil products in my PU and boat and gain about a 10% mileage boost in both.

[lamadriver]

I remove all loose metal and flakes with a pbrush, I typically wipe on some Ospho, and then a pit of primer. If i really feel fussed ill then rattle can it yellow.

Ive had good luck with Ospho

Ive also used the cold galv rattle can stuff with pretty good luck

LD