MarkAlm Posted November 24, 2009 Share Posted November 24, 2009 Can somebody tell me if the o-rings on my lower unit fill and drain are suppose to be teflon or rubber or some other material. I am not sure ! Also can I use o-rings from local hardware store.My motor is a 1997 75hp Mariner . Thanks in advance for your help! Quote Link to comment Share on other sites More sharing options...
boatfixer Posted November 25, 2009 Share Posted November 25, 2009 There is a specific flat washer that is used on those. Do not use orings. Mercury number 12-19183Sierra 18-2945 Quote Link to comment Share on other sites More sharing options...
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