Join Date: Jan 2012
Location: British Columbia
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Re: Stern tube grease and propeller shaft
I have had a grease filed stern tube for several decades now , no problem. Friends have had the same experience. The ends of a grease tube are 1/8th inch standard pipe thread. You can tap the stuffing box or stern tube and leave your grease gun hooked up permanently . You can get grease tubes with brass ends, and hook several together with 1/8th inch brass couplers. In the event of a stuffing box failure the grease will stop water from coming in. I only pump mine occasionally.