Re: 1991 Mercury 9.9
What color is this fluid?Maybe change the gear oil,and watch it.If the fluid is the same color as the oil you put in,it is probably a prop shaft seal or propshaft bearing carrier problem.<br /><br />IF it is the same color,I'd look at a complete reseal of the lower unit.All those seals are the same age.Also do a waterpump at the same time.<br /><br />If it comes apart like a 15 year old motor,you could be looking at 2 to 3 hours,parts could be around $120.Salt water your on your own.<br /><br />DHP
