Guests - If You want access to member only forums on FM. You will gain access only when you Sign-in or Sign-Up on Fishing Minnesota.

It's easy - LOOK UPPER right menu.

  • RECEIVE THE GIFTS MEMBERS SHARE WITH YOU HERE...THEN...CREATE SOMETHING TO ENCHANT OTHERS THAT YOU WANT TO SHARE

    You know what we all love...

    When you enchant people, you fill them with delight and yourself in return. Have Fun!!!

Sign in to follow this  
King Canada

Milky 4 Stroke Oil

Recommended Posts

King Canada

I wonder if anyone has any experience with this. My 1999 4 stroke 70 hp Evenrude had milky looking oil last weekend so I took it in. The mechanic thought it was most likely caused by condensation. Checked it to make sure it was running warm erough and changed the oil. Took it out today and at the end of 5 hours of idling and back trolling it looked milky again. Could it be related to the idling-backtrolling or do I have a seal or gasket going. There was no excess volume to the oil. I plan on running it back to the mechanic on Tuesday. Anybody else experience this?

Share this post


Link to post
Share on other sites
ChemMechanicInc

Well, yes, but the oil level was high, and smelled of gasoline.

I think when you start tilting a 4 stroke engine the way we need to to trailer, etc, a few things start to get goofy.

I guess I compare it to my truck and what may happen if I tipped it almost perfectly vertical and then shook it up like a can of pop (trailering, turns, stopping, etc)

Sorry I can't be of more help.

Share this post


Link to post
Share on other sites
iffy

I've ran into that on a couple early model Yamaha 115 4 strokes. There was a seal that was leaking back into the crankcase, and Yamaha issued a service bulletin on the problem. Not sure whats going on with the OMC, but its probably a seal or gasket. Don't run it like that. The engines internal components require lubrication and water doesnt fit the bill.

Share this post


Link to post
Share on other sites
hawghunter001

yes sir milky oil means water water weans you got to fix it probably a gasket

Share this post


Link to post
Share on other sites
CrappiesNeyes

Not sure if this is your problem but on my Yamaha 115 four stroke I had the same thing happen. It turns out that I had not run the motor "hard" enough yet so the rings had not seated yet. I had been doing alot of back trolling at low rpm and the gas was getting past the rings into the crankcase. This caused the oil level to get high, get somewhat milky, and smelled like gas. As the other poster said, Yamaha had a service bullitin for this that changed the thermostat and some other things to make the engine run a little bit hotter. The mechanic also told me to "go run the motor as hard as I can". I went to Mille Lacs on a calm day and ran her wide open for as much of the time as I could and the problem has since went away. You may possibly have the same problem or you may have a bad seal that is letting either gas or water (hopefully not water) into your crankcase. Good luck.

Share this post


Link to post
Share on other sites
theoilman

Most of the time the oil turning milky means you are getting water in the oil - from several possible ways, but most of the time from the cooling water. Typical problems are head gasket or cracked head. Also, there are a number of other gaskets that can leak causing water to get into the oil. You say you have already drained the oil, put in fresh and run it again and the milky problem came back, it is time to consider digging deeper. To continue to run it will definitely cause more damage.

If you need to find a professional for help, post again with your general location and your engine make, etc. - there are many here who can give you good recomendations.

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  



  • Your Responses - Share & Have Fun :)

    • leech~~
      Next time you give it a try. Take a flash light and look up to make sure the throttle flapper is returning to the closed position when you let off the gas and it dies. I have had them stick open or half open then your more or less trying to restart it at half or full throttle which may just be flooding it out. It's either starving for gas or flooding.  Let us know if you solve it.  Good Luck.
    • huntnfish
      I never fished north of Wahpeton. When I fished down there I'd go south. There's normally some walleye biting early in the year south of the main road through town. I don't know how it would be this time of year. I always fished it first ice because that was usually fishable before most lakes. If you do go out I'd recommend bringing someone along and having a chisel along to check ice. That river ice can be very inconsistent. 
    • sparetime
      I ordered a rebuild kit from amazon for less than $5.00, so hopefully that will help.  YouTube has some videos on installing it.  It is an odd thing, if it sits for a while it will start and I can run it.  Once I take it off full throttle, it will die and I can't get it to restart.  Thanks for the posts so far, I appreciate it. 
    • fishin_magician2
      Anyone ever fish this lake? Buddy of mine wants to try it?
    • leech~~
      For cleaning carbs I use Gumout spray with the tube on it to shoot through all the passage ways. If I'm finding one not flowing well or clogged I like to use a gas welding tip cleaner. There are a lot of sizes and you don't have to jam something to big through it which could widen and ruin the flow. I got a nice pretty new little chain saw from a guy who just could not get it running for Free. Found that no spray would go through the main jet when I was cleaning the carb. Used the tip cleaner to knock out a piece of saw dust, and clear our Deer trails out really nice this year! Like Wanderer and Borch said, rebuild kits are cheap and a good thing to do if it's been gummed up.  p.s those little piss-ant needle flow valve springs are really fun to get back in place with fat fingers! They like to jump off the work bench and hide!!  
    • Tom Sawyer
      Sounds fun Jeff!, The way the ice has set up this year maybe it will happen after all. I would like to start getting a few prizes together for Biggest Cat, and also a kids division. Hopefully someone can bring a few good ones to the scales...
    • Wanderer
      @donethat Where is this access you speak of?  I’m not familiar with “bullhead bay”.  Is there a problem with people trespassing? The access I was referring to last year looked pretty public to me.
    • Borch
      Carb kit may help.  It's plugged or gasket/diaphragm dried out or cracked.  Alternating between choke and open when running will sometimes help if diaphram.
    • Wanderer
      Anything new that way?  I was kicking around the idea of fishing Fish Trap this weekend but went elsewhere in the area.  Been finding 14-15 inches regularly.
    • Wanderer
      Get some sea foam in that gas tank and run ‘er!  I can’t tell you exactly where it’s gummed up, but it is.  It’ll take a tank and maybe two but it should clear up. Or, take the carb back off soak it and clean every oriface you can find by poking and blowing compressed air through all the holes.  Put a new carb kit on it and reinstall. Whichever way you prefer should work. Mix your gas with 100:1 Amsoil next time, especially if you let it sit with gas in it over the summer.  I run about 75:1 and have gotten away without gummed up carbs when forgetting to clear the gas from last year - like today.  First day starting the gas auger.  I found out it wasn’t stores empty like I normally do. Took about 10 pulls but she came around and did fine on the lake today.  I WAS annoyed to find gas in it but I have no one to blame but me.
  • Share & Have Fun