Honey colored oil out exhaust port on 59 10 HP Johnson

[SANDERDS]

I went fishing in a no wake zone, so the day was limited to trolling. The next morning, I noticed a sizeable puddle of honey colored fluid on the floor of my garage. It was coming from the exhaust port. I've used this engine a few times before without issue, but have never only trolled. I thought it was lower unit oil, so I drained it. There was a lot of water and black sludge, but nothing the same color as the oil on my floor. I also didn't see any seals on the screws that I took out. What I'm hoping is that the last guy didn't use seals when they replaced the oil and my water problem could go away if I put in seals when I replace the lower unit oil. That would keep me from tearing into the lower unit. But then what is the oil coming out the exhaust? Should I try replacing the seals on the drain/vent screws, go out and run at normal speeds and then come in and see if 1) I get oil on the floor again and 2) is there water in the lower unit oil? I really hate to tear into the lower unit if not needed.

 

[steddy]

Re: Honey colored oil out exhaust port on 59 10 HP Johnson

I ran a 2 stroke quad for a number of years when I was a kid. After panzie-footing around for a half a day, oil would drip out of my exhaust pipes. This happened for a combination of reasons: The engine wouldn't get hot enough to burn all the fuel, and I ran my mixture a little fat. A little extra lube went a long way between rebuilds. The worst I ever had to change was a few fouled spark plugs and clean a clogged jet or two.

 

[Daviet]

Re: Honey colored oil out exhaust port on 59 10 HP Johnson

If you were doing a lot of slow speed running I would bet that what you are seeing is unburn't oil/gas mixture dripping on the floor.
If you change the lower unit oil make sure to replace the seal washers on the screws.

 

[SANDERDS]

Re: Honey colored oil out exhaust port on 59 10 HP Johnson

Thanks guys. Would the unburned oil be a honey brown color. I'm hoping that trolling is the problem, but I was concerned that it was not darker like the oil I mix with the gas. Maybe the partial combustion changes the appearance?

PS. I am impressed by the fast responses.

 

[steddy]

Re: Honey colored oil out exhaust port on 59 10 HP Johnson

The oil I dripped was usually pretty black in color. Maybe just due to the carbon it cleaned off the inside of the pipes on its way out? It was a pretty long exhaust system.

 

[SANDERDS]

Re: Honey colored oil out exhaust port on 59 10 HP Johnson

Can the lower unit oil/lubricant make it's way into the exhaust ports due to water intrusion? I'm fairly certain this was not the same oil I put in the gas. Unfortunately, I didn't smell it to see if there was gas present. Also, it looked nothing like the oil that came out the louwer unit drain after the water escaped. It was a thick black sludge.

 

[Daviet]

Re: Honey colored oil out exhaust port on 59 10 HP Johnson

Change your lower unit oil with new gaskets on the screws, take the motor out and run the snot out of it. I bet the leak will be gone or greatly decreased. With a oil ratio of 24:1, it is normal for the leakage from the exhaust after slow speed running.

 

[Kiggsia]

Re: Honey colored oil out exhaust port on 59 10 HP Johnson

I had the same problem with a 1960 18 horse Evinrude. I had no owner's manual but I'd been thinking the oil ratio was 24 to 1 and after I sold the boat and motor, the buyer thought maybe the ratio fror a 1960 should be 50 to 1. Never saw him again to find out if the oily exhaust problem went away if he did use 50 to 1 ratio. Are you sure the ratio for your motor is 24 to 1 rather than 50 to 1?