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Bravo reservoir empties after running fairly hard
I finally got my boat in the water after installing a Daytona Sensors ignition and after running about 10 miles at 70+, my alarm went off. My drive reservoir had emptied all over the bilge. I had my drive serviced by AADS this spring and they did a pressure test so the drive is sealed up tight. I checked the reservoir for cracks and I can't see anything that would cause it to leak. As near as I could tell all the oil came out of the cap. I pulled the top and bottom oil plugs to check if I had water or air in the drive and both drained clean oil. The reservoir holds oil overnight so I think it's ok. I'm running NEO oil so I don't think I have a foaming issue with the oil. I checked my drive temp after running 70+ for awhile and it was barely warm. I'm looking for any suggestions.
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I’m not a mechanic. If you had the drive pressure tested it doesn’t sound like it’s coming out of the outdrive. If your getting oil out the cap and bilge is it possible that the drive is just getting too hot. Do you have a drive shower? I know I had our drive pressure checked and it was all good . But after we run it wot for a while it will loose a little oil. But we have a drive shower. I’m talking about a tablespoon |
Originally Posted by 3pointstar
(Post 4695419)
I’m not a mechanic. If you had the drive pressure tested it doesn’t sound like it’s coming out of the outdrive. If your getting oil out the cap and bilge is it possible that the drive is just getting too hot. Do you have a drive shower? I know I had our drive pressure checked and it was all good . But after we run it wot for a while it will loose a little oil. But we have a drive shower. I’m talking about a tablespoon |
But as I understand it - all the oil ended up in the bilge - nothing is leaking external to the boat. There is a fellow on this site BUP - he is a Mercruiser Mechanic- you may want to send him a message
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Have you talked to George at AADS?
Padraig |
My drive reservoir had emptied all over the bilge. Assuming your lube bottle is not cracked. The cap has a one way valve in it, and it lets air in, but not out. If the valve gets stuck open, then when the drive heats up even a little, it pushes lube out and all over the bilge. So $10 for a cap or $35 for the bottle and cap |
Cap on bottle is possible, or upper input shaft seal. Leaks into bellows and then into boat. I would try cap. Double check integrity of Resivoir and hose. Then call George. Hairline leaks can show up in hoses/plastic bottles with temperature and less oil viscosity |
How about a GoPro aimed at the reservoir? It means another bilge clean up but you may see where the oil is coming from. |
Its the cap. Had the same thing happen.
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I was able to make another run and opened the hatch as soon as I slowed down and I could see the oil streaming down the transom by the top of the reservoir. I’m just going to get a new reservoir and cap to be sure. At $85 a gallon for NEO oil it’s a cheap investment. Where’s a good place to get merc parts? |
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