Oil leak screws in lower/upper gear cases Model 10014 Evinrude 10 hp

[docscott]

quote fleetwin:

Doc
This is a great old outboard, and you are wise wanting to get that gear case resealed properly to avoid lube leaking out, and water leaking inside the gearcase. Running the engine with a gearcase full of water will eventually destroy many of the internal components, including the driveshaft bushings in the gear housing itself.
First, in order to pinpoint and evaluate leaks properly, the gearcase should be “pressure tested”. The gearcase can then be submerged in water, you will see air bubbles where there is a sealing problem (the gearcase needs to be removed to do this test properly).
Working on one of these gearcases isn’t particularly difficult, but sealing it up properly is a detailed process that can be difficult. Trying to do this yourself, with little experience, and no special tools, will not lead to success.
You mention that lube is leaking from the two forward screws securing the skeg to the gearcase. These screws do need to be sealed in order to avoid leaks. The screws may not need to be replaced, it depends on the condition of the sealing surface under the screw head. The aluminum mating surface on the skeg could be gouged/deformed as well. Have a look at these surfaces after draining the gearcase and removing the two forward screws. Using a rugged/hardening sealer (such as the OMC type M/847 sealer) under the screw heads is usually all that is needed to seal these areas sufficiently, this will seal the mating surface between the screw head and aluminum hsg. Please do not remove the little phillips screw next to the lower lube drain plug, this secures the inner shift linkage which will fall apart if the screw is removed! In order to refill the gearcase, both upper and lower lube screws must be removed, the lube is pumped in from the bottom until it flows out the top screw. The top screw is then reinstalled creating a vacuum inside the gearcase minimizing leakage while the lube filler is removed and the lower screw is reinstalled. Please make sure each lube drain/fill/vent screw has one and only one gasket. Mixing up this step will create another gearcase leak.
In short, I don’t recommend you attempting to pull this gearcase apart and attempting to reseal it. But, you can surely remove those leaking screws and reseal/replace them though. From what you have written, I don’t have a lot of confidence in the repair that was made by your retired friend. Needless to say, leaks like you have described would have easily shown up if a proper pressure test was performed after he completed the job.

Amazing !! I really appreciate your comprehensive insight and thorough description of just what needs to be done. I can imagine it is tough to take a look into a repair problem when the writer, ie, ME , is less than comprehensive about the issue at hand. You hit all major points and were accurate in assessing just what was going on. It is still a part of our lives and has been since 1957 and, so, yup I will look to do the right thing given my lack of any knowledge, let alone hands-on experience 🙂 . My next step is to try to do the sealing of the 2 screws AND ALSO try to locate an experienced skilled technician. I now know and realize that they are not easy to find( there are none – got more turn-downs than expected ) within 30 miles of my hometown. Time to reach out and make a road trip!! Again, TY VERY MUCH for your time and consideration, I am very appreciative of your knowledge and sharing your insights.

[david-bartlett]

Doc,

If you are handy with trucks and appliances there is nothing on that 10hp Evinrude to fear!!! Just have a go at it. It is already leaking so you probably won’t make it any worse. If you want to bring it to Bethel, I will fix it for you, but YOU CAN DO THIS!!!!!

Welcome. If you haven’t done so already, consider joining the Pine Tree Boating Club chapter of AOMCI. Lots of great folks and good times with old outboards.
http://www.pinetreeboating.com/pinetree … lcome.html

[lindy46]

Yeah, just put some sealant on the threads of the two leaking screws and replace them. I usually tighten the screws using an impact screwdriver and that usually solves the leak.

[fleetwin]

Sounds like Dave has offered to help, sounds like a great learning experience, if resealing the screws doesn’t help…

[wedgie]

Yeah. Try tightening the screws first.

[chris-p]

I would first take the 2 screws out, coat them with a sealer, then tighten them down with an impact driver.

[docscott]

quote david bartlett:

Doc,

If you are handy with trucks and appliances there is nothing on that 10hp Evinrude to fear!!! Just have a go at it. It is already leaking so you probably won’t make it any worse. If you want to bring it to Bethel, I will fix it for you, but YOU CAN DO THIS!!!!!

Welcome. If you haven’t done so already, consider joining the Pine Tree Boating Club chapter of AOMCI. Lots of great folks and good times with old outboards.
http://www.pinetreeboating.com/pinetree … lcome.html

Good morning, thank you very much for your reply and offer. I will most likely be contacting you (as I am about 2 hours away ) if the initial repair by using sealant on the 2 screws and using an impact wrench to tightened them doesn’t get done or fail to stop the leaks. Will the sealant actually work if the housing threads are coated with oil when the screws are replaced ? Thank you.

[docscott]

quote lindy46:

Yeah, just put some sealant on the threads of the two leaking screws and replace them. I usually tighten the screws using an impact screwdriver and that usually solves the leak.

Sounds like a good start and I will give it a try, thank you for your time and expertise.

[docscott]

quote fleetwin:

Sounds like Dave has offered to help, sounds like a great learning experience, if resealing the screws doesn’t help…

Good morning fleetwin, thank you for your prior post and this one. You have been great with your advice and THANK YOU again for all your time and knowledge!

[docscott]

quote Wedgie:

Yeah. Try tightening the screws first.

Good morning, I really appreciate your reply and will give that a try. I am appreciative of your time and expertise.

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