Milky Gear Oil

Post by **jmikail** » Tue Mar 06, 2007 6:48 pm

I just helped a buddy change his lower gear oil and it was dark grey along with light brown. I told him that it means that some water seeped in through a faulty seal.

The engine is 1970s Johnson 9.9hp and I just wanted to get an estimate of the repair from some of the experienced members of the board before he takes it to his mechanic. I do not know how much it would cost and I do not want to see him get hosed.

How much should it be to replace the seals? The engine is running strong, otherwise.

Post by **swampbuster** » Tue Mar 06, 2007 7:12 pm

Hi Mikail

The threaded plugs that you drain and fill gear lube through have gaskets on them I would replace them first and make sure the water is not getting in there before you go to a mechanic.I just had my lower end done on a 115 hp and it cost 350.00 I would think a 9.9 would be much less hopefully.

Russ

Post by **jmikail** » Tue Mar 06, 2007 9:19 pm

swampbuster wrote:Hi Mikail

The threaded plugs that you drain and fill gear lube through have gaskets on them I would replace them first and make sure the water is not getting in there before you go to a mechanic.I just had my lower end done on a 115 hp and it cost 350.00 I would think a 9.9 would be much less hopefully.

Russ

Wow, that does not sound cheap. I will tell him about the screw gaskets, although I do not imagine that he would be able to tell about more water for at least this season.

Post by **jmikail** » Tue Mar 06, 2007 9:19 pm

swampbuster wrote:Hi Mikail

The threaded plugs that you drain and fill gear lube through have gaskets on them I would replace them first and make sure the water is not getting in there before you go to a mechanic.I just had my lower end done on a 115 hp and it cost 350.00 I would think a 9.9 would be much less hopefully.

Russ

Wow, that does not sound cheap. I will tell him about the screw gaskets, although I do not imagine that he would be able to tell if more water seeped into the lower unit for a while. The oil does not look like it has been changed in a very long time, so I could have him run it a couple times and then recheck the gear oil colour.

Post by **Kiltylake** » Tue Mar 06, 2007 10:29 pm

It may be a good idea to have the gearcase pressure/vacuum tested. It would only take a few minutes at a reputable repair shop to check and could save a future overhaul.

Post by **jmikail** » Tue Mar 13, 2007 7:13 pm

Here's a simple question. Where would you go to get the gaskets (or o-rings) for the screws? Any place specific online or at any marine supply place?

Post by **swampbuster** » Tue Mar 13, 2007 8:43 pm

Just go to any Johnson/Evinrude dealer they will have them very cheap make sure you tighten the plugs good and tight with a large screwdriver. Run the motor a few days then check the oil again, if it has gotten milky again I would take it to a mech. I gotta think it would be a lot cheaper than mine.

Hope this helps / Russ