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Posting a reply to: Re: Mercury EFI 150- Prop Question

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LarryO

Posted 5/12/2014 7:07 PM (#711237 - in reply to #711088)
Subject: Re: Mercury EFI 150- Prop Question

Posts: 192

I found this from the Mercury website:

Will a stainless steel propeller damage my lower unit in the event of an underwater impact? Mercury engineers, conducting underwater impact testing, found no substantial difference in the amount of torque transferred to the propeller shaft between an aluminum and stainless steel propeller. Mercury’s Flo-Torq II hub system is designed to give way during an underwater impact – protecting the outboard and still providing you the ability to idle home safely.

http://www.mercurymarine.com/propellers/about/how-to-choose/stainle...

Watch the video on the link above.

I've seen similar statements made at various other websites as well. Seems to make sense to me from an engineering perspective but I am a Civil Engineer, not a Mechanical Engineer so take that for what it is worth. Most people will assume the aluminum prop will give when hitting something preventing or reducing engine damage.

Edited by LarryO 5/12/2014 7:11 PM