Goop oozing from exh. oil slick, Park ranger

[a70eliminator]

I already know it's the two stroke thing, unburnt cumbustables and this has question probably even has a sticky that I haven't read but here's what happened.
I had a Park Ranger come up to check my registrations, my 1967 60hp evinrude was making a pretty good oil slick (the engine was running) he told me that I would need to address the oil leak before putting the boat back into the water.

I trailer up the boat and proceed to the tie down area, where the Ranger again comes over and chats with me about the oil leaking, there was about a 1/2 cup of the goop that had drained onto the asphalt and puddled below the engine.

I had just out new lube in the lower (the old had no signs of water) so I drained it carefully just to inspect condition was good, i went ahead and pumped 15psi and it held, so now I'm sure it the nature of the beast evinrude.


Now the big question is what now? tell the ranger to go suck an egg? I know he'll be waiting for me I'm a Local.

 

[Vic.S]

Re: Goop oozing from exh. oil slick, Park ranger

If its black and there's no signs of problem with the gearcase then you are right its the unburnt oil from the two stroke mixture.

Nowt you can do about it but surprised you see that much. 1/2 cup full seems a phenomenal amount, there should not be much imore than that in a gallon of fuel. Maybe wants taking for a good fast run to clear it out.

You are using the correct 50:1 mix, not over oiling it and using a proper outboard 2 stroke oil to TCW-3 spec?

Could try the Sea Foam decarb treatment but dont do that while the Ranger is on duty!

Have to start saving bucks for a 4 stroke

 

[a70eliminator]

Re: Goop oozing from exh. oil slick, Park ranger

This was my first time out with this boat, I had run it at home in the driveway and I did stall it out a couple times pouring sea foam directly into each carb. I then ran it till the smoke cleared. When I got it to the lake it started without a hitch, I proceeded out to the open water and ran it up to 4500 RPM's for short while, then midrange for a while and everything was good. I idled it for a while and finessed the carburetors air fuel adjustments, found the throttling point where engine spits then open from there just a tad (1/8 turn) did this back and forth between the two carbs and they respond just as they should, I'm about 1/8 turn from point of spit sputter so it's lean as can be.
Thing that I don't get is the goop looks foamy tan color, like it was my gear lube, but it held 15psi. and when I drained it had no signs of water. But it is suspicious that the goop isn't black and sooty but looks almost like a rootbeer float.

 

[Dhadley]

Re: Goop oozing from exh. oil slick, Park ranger

That's not unusual for that model motor from that era.

 

[a70eliminator]

Re: Goop oozing from exh. oil slick, Park ranger

I also noticed that where cooling water spits out along with exhaust from the big outlet high above the water line was making pretty colors, and after shutting off motor I could see the cream colored droplets floating up from below water line, the time it took me to walk it up and fetch my truck the oil bubbles had stopped completely.
I hate putting oil into the water like that, I'm wondering if there could be a pocket of accumulated combustables somehwere that could be cleaned out? maybe run the engine and spray some water mist into the carbs and steam clean everything from the comb. chambers out?

 

[lindy46]

Re: Goop oozing from exh. oil slick, Park ranger

Yup, not much can be done. My 1957 35hp and 1972 18hp 'Rudes both do it. It's not so noticeable when cruising but more apparent when I get back to the dock and shut down. Then the oil slick is noticeable.

 

[F_R]

Re: Goop oozing from exh. oil slick, Park ranger

It is foamy and expanded in amount because it is emulsified with water. The root beer float is a good analogy...but don't drink it.

It only turns black because it picks up carbon particles from the exhaust. And you went and cleaned the carbon out.

There is also a significant amount that goes directly from the crankcase drains to the water. You can catch that part if you really care. There is a horizontal hose at the base of the powerhead. Re-route that to a collection can. Remember, it is a flameable mixture.

The ranger is ignorant. Sorry, you can't do anything about that.

 

[a70eliminator]

Re: Goop oozing from exh. oil slick, Park ranger

Ok thanks for clearing that up, I'm mixing at the ratio of 50-1 but I've never been all that critical with measuring, just kinda eye up 16oz (1/2qt) to 6 gals. and maybe thats also is not exatly 6 but more like 5 to 5-1/2 i don't know exactly just not filled to the brim cause it will come out the vent and stink up.
so if i get say 1 little oz too much how much difference would it actally make? Maybe thats part of the problem. Well anyhow i'm going to definately measure critical next time and maybe look for some synthetic if it will help.

And yes I will find that crank drain you speak of, maybe just cut the tube and insert a barbed tee so i can always put it back, i am curious as to just how much oil i can catch and what it loos like, thanks for that tip.

 

[kenmyfam]

Re: Goop oozing from exh. oil slick, Park ranger

Give it a good decarb and mix accurately.

 

[ondarvr]

Re: Goop oozing from exh. oil slick, Park ranger

What oils are you using? Each brand and type will have a different amount and/or color of goo. Penzoil blend seems to be the worst for leaving a puddle of tannish colored goo under my motors, it will drip out for a week or two on the shop floor. Other oils have zero goo dripping out. This only happens on my small motors that are used for trolling, the big motors are normally used at higher RPM's which would keep the gunk from building up in the exhaust housing.

Try a synthetic oil and see if the slick is reduced in size, also check and see if the carbs are clean, a leaky float needle may pass fuel through the system and leave a slick, or enlarge an existing one. Like DH said though, these older motors tended to leave a larger slick than newer ones.

 

[a70eliminator]

Re: Goop oozing from exh. oil slick, Park ranger

Yep Pennzoil the yellow bottle thats what it was, not that I'm a Penn man but that is what was put in the tank last year cause the half emply bottle is still in the boat, I've never really had any peticular oil I use, just whatever the service station has on the shelf at the time, as long at is the TC-w stuff. I've never given much reguard to two cycle oil, thanks.

 

[jbjennings]

Re: Goop oozing from exh. oil slick, Park ranger

I found a marked difference in crud production with the full synthetic, and you can point to the label on the can and inform the ranger that it is biodegradable (I guess moreso than the real stuff). I think it may have just been particularly bad that day because of low temperatures, more oil in the mix than usual, etc. Sometimes mine put a lot of crud out, sometimes they don't. ????
Later,
JBJ

 

[coolguy147]

Re: Goop oozing from exh. oil slick, Park ranger

only thing i can say to u is to use synthetic to reduce the problem.


or u can tilt the motor up so it wont all gooze out on the floor for a cleanup

 

[ezeke]

Re: Goop oozing from exh. oil slick, Park ranger

If you study the oils you can learn the flashpoint, which differs from oil to oil and will make a lot of difference in the amount of carbon and unburned oil left in the engine.

Most full synthetic TC-W3 oils are advertised as biodegradable.

You get better combustion of the spent oil with less run-off if the engine runs at the proper temperature because of good thermostats.