Engine Compartment filled up with 1' seawater

K

Katemma Life

Member
Oct 7, 2018
135
cape cod
Boat Info
2007 sea ray 290 SLX
Engines
Twin mercruiser MAG 350 MPI w/ Bravo III
Hose clamp let go on the Port engine's raw water hose. Got it fixed and with water is all pumped out. Concerned salt water got to the bottom of the oil pan. Any suggestions on what to do to reduce future errosion?
 
Thank you!
was having someone tell me to spray the bottom of the pan with undercoating. My mechanic doesnt like that idea. Any opinions on that one?
 
starter motors are working right now so I assume not but I am not sure.... any suggestions there?
 
Katemma Life said:
dont you have to take the engine out to replace the starter?
Click to expand...
I have the same motors/year... the starters are on top and easy to get to. Now mine are reversed from yours because of the V-drives.
 
If you think the starters went under I would pull take them apart and go through them including a DI water rinse then compressor blow dry then again a coat of CorrosionX inside and out. Even take the Bendex solenoids apart and do the same. If the rotor bearings are sealed then I'd say reuse them. There's not a lot to the starters; easy to take apart and put back together. The electrical wire terminations that connect to the starter, If they went under that will end up haunting later. Think about cutting the ends off and having new ends installed. That corrosion on the copper wire will magically creep up under the insulation and render the entire run now too short to reterminate and useless.....
 
Undercoating after 14 to 15 years of service is a bit of “closing the barn door after the horse has left”. Besides if they are steel and painted, getting wet even with sea water isn’t the end of the world. If the oil pans are aluminum it’s a non issue.

Tom is correct with his procedure for repairing the starter motor, but if memory serves, a new Mercruiser V8 starter motor is something like $100 to $200. If you are really sure they got dunked, buy two. Then you can put them on the shelf and wait for the failure, or swap them now on your schedule.
 
Thanks for all of your help fellas. I had new starters put in last year when the engines were out. I gotta say; I pulled the batteries and tried to get even my hand underneath these engines and its just about impossible. Quite frustrating now gonna be wondering when the next thing will fail... I sprayed salt-a-way under there, let it dry and sprayed WD-40. Problem is I am not at all convinced I covered the entire bottom because I cant access it. Being 6'3" doesnt help... anyway, I guess I will wait and see. thanks again
 
Katemma Life said:
Thanks for all of your help fellas. I had new starters put in last year when the engines were out. I gotta say; I pulled the batteries and tried to get even my hand underneath these engines and its just about impossible. Quite frustrating now gonna be wondering when the next thing will fail... I sprayed salt-a-way under there, let it dry and sprayed WD-40. Problem is I am not at all convinced I covered the entire bottom because I cant access it. Being 6'3" doesnt help... anyway, I guess I will wait and see. thanks again
Click to expand...
Do you mean sprayed salt away, then rinsed with fresh water, then let it dry and then WD-40? If not the "rinse" is the most important part of the process and you need to do it again. Also, WD-40 is not the best to prevent future rust underneath. Corrosion-X gets much better ratings for that purpose.
 
It's called electrolysis and once it starts it's not easy to remedy. A rinse and a spray isn't going to do it.
 
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