Why tilt propeller out of water?

[aldentre]

I was having a discussion with someone regarding the necessity of raising the propeller out of the water when not in use. What are the specific reasons for doing so? I'm using a minn kota electric motor being in a community fresh water lake.

 

[athiker]

Re: Why tilt propeller out of water?

When you say "not in use" do you mean at anchor while fishing or left in slip for days when the boat is not in use?

I don't know much about electric motors (plastic propeller maybe?), but I think the general concern for i/o when slipping is possible electrolysis (sp?) damage from leaving exposed metal in the water for long periods.