Milky oil in lower unit

[vdimenna]

I have 1996 Ocean Pro. Drained the gearcase at the end of the season to find milky oil. Resealed the unit and ran the next season with the same result. <br />There isn't any visible cracks in the case. The driveshaft does have some left to right movement (not sure if this is normal). <br />Thought there might be a problem with bearing housing causing water to leak in but the rollers look fine as well. <br />Propshaft is smooth and snug.<br /><br />I've had the unit sitting assembled full of kerosene and not a drip.<br /><br />Any help would be greatly appreciated.<br /><br />Vic.

 

[rickdb1boat]

Re: Milky oil in lower unit

Did you replace the fiil/drain plug washers? Vacuum test would be next step..

 

[vdimenna]

Re: Milky oil in lower unit

I did change the fill and drain plugs/washers.<br /><br />I will try a vacuum test. <br /><br />Thanks.

 

[wilde1j]

Re: Milky oil in lower unit

Vacuum and pressure tests needed to nail it, both done with oil drained. You clearly still have a leak or leaks.

 

[vdimenna]

Re: Milky oil in lower unit

Pressurized the unit, no leaks until I moved the input shaft left to right. The movement is where the lower and upper driveshaft connect. The service manual says they're attached via spline and roll pin.<br />I would think that movement would never happen, since the shaft will true up when the lower unit is bolted in. <br />All the bearings look fine. <br />Is there a bushing where the drive shaft slides into the power head that could be worn out causing the driveshaft to wobble and let water in?<br /><br />Vic