"I have a 2000 twin engine boa
"I have a 2000 twin engine boat powered with VP 5.7 gsi volvo penta duo-prop drives. I drained both lower units and I found one lower unit gear lube almost black in color and the other one golden in color. I use nothing but vp synthetic gear lube in both. I changed it last fall myself. what would cause the color to get that dark? this drive also has a slight noise when in neutral only, that is not affected by any steering wheel movement. the noise will instantly stop as soon as you put it in foward or reverse. I will be taking this drive to a volvo penta repair shop ,but i would like to have any thoughts on this first, thanks Joe."
"I have a 2000 twin engine boat powered with VP 5.7 gsi volvo penta duo-prop drives. I drained both lower units and I found one lower unit gear lube almost black in color and the other one golden in color. I use nothing but vp synthetic gear lube in both. I changed it last fall myself. what would cause the color to get that dark? this drive also has a slight noise when in neutral only, that is not affected by any steering wheel movement. the noise will instantly stop as soon as you put it in foward or reverse. I will be taking this drive to a volvo penta repair shop ,but i would like to have any thoughts on this first, thanks Joe."