Milky gear oil outboard

Oil plays an important role in the overall function of a boat engine. Without oil, the engine and its components may overheat and degrade. In some cases, though, owners may notice a milky coloring in their oil. This is a troubling sign that needs to be addressed; otherwise, it could result in severe damage to the mechanical components.

But what exactly causes milky engine oil? And how do you fix it? Nine out of ten times, a milky color and consistency is an indicative sign of water in the oil. Inspect your engine gaskets to ensure they are solid and not leaking. Thankfully, gaskets are inexpensive and relatively easy to replace. Just take your boat to a marina or repair shop and show them the damaged gasket that needs replacing.

Of course, moisture may enter the oil through condensation, which is particularly problematic during the cool fall and winter months.

Assuming the condensation is minimal, you may be able to remove it by running the engine for minutes. As the engine heats up, it will evaporate some of the moisture. If the problem persists, chance the oil for a second time. This should remove the majority of moisture and other impurities lingering in the engine. There are some steps you can take to prevent your engine oil from turning milky, such as adding a stabilizer to it.

These products are designed to prolong the life of engine oil, discouraging moisture and other impurities from entering it. A good rule of thumb is to add a stabilizer to your engine oil when storing your boat for longer than one month. This problem is usually caused by water entering the oil, but you have to do some troubleshooting to find out where exactly the moisture is coming from. We are open and working our normal schedule.

Buy the products and parts you need Buy Parts and Products.The oil that came out of the lower unit was the color of coffee with cream. I wonder if this is normal or does the oil have water in it? The dealer gave me Mercury High Performance gear lube blue color rather than the standard Mercury gear lube. I just changed the oil in my Mercury after putting nearly 1, miles under the hull this summer no hour meterand it was black as coal.

Check with your dealer, and bring in the old oil for his inspection. It is sitting in a jar on the shelf in the work room for reference.

is still safe to drive outboard when there are some water in gearbox?

If you let an oil-water emulsion sit for a long period will the two separate? Very important!! After craking sic it open slighty to see the oil drip out. If oil is like regular oil you are in good shape. I personnaly have been thru this problem before and it's no fun. If so, it won't be covered by warranty, but if the shaft is clean, they'll probably fix it for you.

I've got to say, it's not likely to have a warranty failure there with such a new engine. The lube is an amber brown color going in. My experience with Evinrude OEM and Mercury OEM gear oils is that they are all dark blue going in, and coming out at the end of the season are nearly black, with the expected small amount of metal shavings on the magnetic tip of the bottom plug.

I've always been told to search for any variation in this pattern as a cause for concern. That happened to me. I assumed the worst, pulled off my lower unit with the intention of checking and replacing the seals. When I pessure tested it, the only leak was in the top drain plug. Everytime you remove the screws, you should replace the gaskets.

Changed lower unit oil and it came out milky looking.

milky gear oil outboard

Brought it to the dealer and he pressure tested it, said it was fine but changed the seals anyway. It could be just 2 different brands of oil mixing together. For peace of mind I would get it checked.Forums New posts Classifieds Gallery Search forums. Local Knowledge. Search Everywhere Threads This forum This thread. Search titles only. Search Advanced search….

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I checked my lower unit oil and its green and a tad milky white, and smells bad. I attached a pict. I bought the boat in June Since I bought the boat, I have put about 30 hrs on it over the summer I removed a little oil by only removing the fill screw.

I squirted a little new oil in the bottom right of the pan to compare the two. I did not know if this falls into the normal category or if I should be worried about the seals leaking.

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Does the lower unit oil look very bad or is this normal? Stanley Pro Boat Scrubber. I'm no expert, but "milky" means a leak on my boat. I would have another talk with your mechanic. Milk in your rear end is bad for the rear end. Your rear end in milk is bad for the milk.

milky gear oil outboard

If either occurs they should be looked at by a professional. Sounds like ya gotta bad seal, get her fixed before she goes clatter, clatter, boom. Honda Dude Newbie. Oct 29, 6 18 Oxnard www. You definitely have water in your lower unit oil. First check to see if the drain screw and vent screw have washers or o-rings on them. If not, I would put some on and try it out some more to see if it's still leaking.

If it is, get it to a shop.Four-stroke outboard oil got you stumped? You are not alone. A question from a boats. The short answer is yes—go ahead and use the new Mercury oil.

For the longer answer, read on. The new 25W Mercury oil formula is offered in standard and a more-durabile semi-synthetic blend format. The 10W is a better choice for rope-start outboards. Back Explore View All. Back Types View All.

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What Color Should Lower Unit Gear Oil Be?

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The Outboard Expert: Oil Essentials. Outboard Expert: Salt Solutions.Without it, you go nowhere. Its internal mechanical workings put tremendous pressure on the lubricant inside. This hardworking device just needs some simple, regular maintenance to help it stay that way.

The gears inside your lower unit are constantly turning, and the only protection they have is the lower unit lubricant you use. Its job is to form a micro-thin film between the metal component parts to keep them from actually touching. Under the large loads these gears exert, proper lubrication requires extreme resistance to pressure, foaming and molecular shear.

And, since the lower unit operates underwater, its lubricant also has to be capable of maintaining necessary lubricity even when a significant amount of water is present, should some leak inside.

Visually inspect the exterior of your lower unit for any signs of damage every time before you go out. If found, visually inspect the propshaft seals for damage or leakage.

Allow a small amount to drain into a clean container. Have the lower unit seals inspected by your Yamaha Marine dealer through a pressure test, and if necessary, have the seals replaced. Pressure testing a lower unit is best performed by an authorized Yamaha Marine dealer, because depending on findings, it may be necessary to disassemble the lower unit for further inspection. The resulting fine bubbles might be confused with the milky appearance that occurs with water ingestion. Yamaha recommends replacing your lower unit lubricant after the first 20 hours for a new outboard, then every hours after that.

To do it yourself, place a pan under the bottom drain screw, remove the screw, and then remove the upper vent screw on the side of the lower unit. Allow all of the lubricant to drain into the pan. Fine metallic dust is normal, but if you find larger chips of metal on the screw or in the pan as the lubricant drains, have your local Yamaha Marine dealer check for possible internal damage. Use a pick to pull it free, as these must be located, discarded, and replaced each time these screws are removed.

Tip: These drain screw crush washers serve as gaskets and are not reuseable. They are a main source of protection against water intrusion into the lower unit, which can cause catastrophic dilution of the lubricant. Do NOT try to save a few pennies here. Lower units are very expensive. Once all the lube has drained, refill the lower unit by threading the appropriate fitting into the lower unit drain screw opening on the bottom of the bullet and slowly pumping in fresh Yamalube Marine Gearcase Lube or Lubricant HD.

Once you see this new fluid seeping out of the upper vent screw hole, stop and wait 5 minutes, then very slowly continue pumping until it seeps from the vent screw again.

At this point, replace the vent screw with a new crush washer installed, and tighten according to manufacturer specifications. Remove the fitting attached to the drain screw opening, and quickly re-install the drain screw with the new crush washer installed. Tighten to factory specifications.

You may choose to do these procedures yourself, or you can have your authorized Yamaha Marine dealer do them for you. Either way, performing them is important for proper continued operation and your continued satisfaction and enjoyment.

Tip: All the items in this catalog are available through your local authorized Yamaha Marine dealer. More information can be found at YamahaOutboards.

Lubricate it right. Home Why Maintenance?Forums New posts Classifieds Gallery Search forums. Local Knowledge. Search Everywhere Threads This forum This thread. Search titles only. Search Advanced search…. Everywhere Threads This forum This thread. Search Advanced…. Log in. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Thread starter Hooked Start date Nov 1, Hooked Newbie.

I checked my lower unit oil and its green and a tad milky white, and smells bad. I attached a pict. I bought the boat in June Since I bought the boat, I have put about 30 hrs on it over the summer I removed a little oil by only removing the fill screw. I squirted a little new oil in the bottom right of the pan to compare the two.

I did not know if this falls into the normal category or if I should be worried about the seals leaking. Does the lower unit oil look very bad or is this normal? Stanley Pro Boat Scrubber. I'm no expert, but "milky" means a leak on my boat. I would have another talk with your mechanic. Milk in your rear end is bad for the rear end. Your rear end in milk is bad for the milk. If either occurs they should be looked at by a professional.

Sounds like ya gotta bad seal, get her fixed before she goes clatter, clatter, boom. Honda Dude Newbie.If we can't tunnel through the Earth, how do we know what's at its center? What evidence does Coutu use to support her claim that improvisation requires resilience. A lady introduce her husband's name with saying by which can stop or move train what is that name.

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Water in lower unit oil ?? 1977 Evinrude Outboard Motor Part 4

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milky gear oil outboard

Wiki User Milky oil is a sure sign of water contamination usually due to defective seal s. Find the leak and you absolutely need to change the oil. Asked in Dodge Dakota Where is the oil sending unit on a 96 dodge Dakota? The oil sending unit is located slightly lower than the distributor on the engine block.

Condensation of moisture mixed with the oil film inside the cap. If oil in oil pan is not "milky" you are ok. I use 80 weight gear oil.

Asked in Chevy Celebrity Where is the oil sending unit on a Chevrolet Celebrity or the oil pressure switch?

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If your Celebrity has the 2. Coolant should not leak from the oil sending unit. Asked in Water Skiing Mercury 90hp 6 cylinder outboard 2 stroke before you take this too water you are going to change the spark plugs is there any oil which requires changing gear oil if so what type thanks?

Changing the plugs and the lower gear oil yearly is best. There are two flat head screw heads on the lower unit, an upper one for filling and a lower one for draining. Be sure to use marine grade lower unit oil not just regular gear oil. To change the lower unit oil in a Yamaha four stroke one must obtain proper parts, the proper tools, and instructions on how to properly take apart and put together the parts.

milky gear oil outboard

The oil sending unit is typically located in the lower section of the engine block and drops down into the oil pan. May also be referred to as the oil pickup. If you remove the oil pan, you can't miss it. That would be moisture in the oil.

Asked in Powerboats What lower unit oil goes in evinrude 9. Quicksilver 80W Premium Gear Lube.


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