PSS Shaft Seal Maintenance Kit f/30mm Shaft 1-3/4" Stern Tube [07-30M-134R ]Maintenance Kit for 30mm Shaft & 1 3 4" Stern Tube As with any rubber or silicone hose below the waterline, the PSS bellows must be inspected regularly for any signs of wear, aging, or chemical deterioration. PYI recommends that the bellows be replaced once every 6 years. During the bellows replacement, it is also recommended that the O rings and set screws be replaced, as well as the hose clamps. PYI includes all the necessary replacement parts in
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