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1976 Jonson 9.9hp goo issue

Jupiter Dinghy

Jupiter Dinghy

Regular Contributor
I cleaned and rebuilt the carb, and restarted this 76 Johnson after it sat for a few months.
Had a bit of difficulty for getting started but finally did, and now it starts first pull (without choke though, doesn't like to be choked for some reason).
Then after running it for a while, I noticed this oily goo in the test tank:
11qh1qb.jpg


So I'm thinking ok, I have a bad seal in the lower unit, let me pull it out of the tank and drop the foot, and here's what it looked like out of the water:
27wsv7.jpg


The thing is it DOES NOT smell like lower unit oil, but more like motor oil and a hint of gasoline too... so I'm thinking before taking the lower unit off, let me check the oil in it first. I unscrew the fill plug and nothing but clean lower unit oil sipped out. Not a trace of water in it.
So I don't think it's lower unit related, but where does that gooey stuff come from and why?
I have seen this stuff come out of the prop hub on these motors before, and was told it's of no concern, but never seen as much of it coming out!
Here are the two spots it sipped out of after I wiped it clean:
2z3uc9h.jpg

rri8tz.jpg



Any experience with that anyone?

Thanks!
 
Absolutely normal!!! What may be a bit abnormal is the amount and that could be because you were having trouble getting it started. It is the oil that you put in the gasoline. It has gone through the engine, done its job, some is burned, and the rest is discharged out the exhaust. When you were having difficulty starting it, gas was going through but none was being burned, and it all went out the exhaust.

To say again--It is normal. That's just the way two-strokes work. Sleep well, all is ok. Well maybe not the hard starting part.
 
Thanks fdrgator! I went and ran it on the water today and it ran excellent, until the point where it died..... :( then it would start right back up, run for a couple seconds and stall again. The only way I was able to get it to keep going was to pull the choke all the way.
I got back to the ramp slow speed with the choke fully pulled (beats rowing!) and now I guess I need to go over the carb cleaning again...
 
All done! Gave the carb a second cleaning (although all the orifices looked clean and opened to the ***** eye, there might have been a spec of something in the way somewhere, because after putting everything back in, it started at first pull, sounding better than ever.
As to the "goo" mentioned above, it is 99% gone now, I cleaned the tank and filled with water before putting the motor back in, and I can only see a few specs of the cream color stuff, but almost nothing. Looks like the morning run got it cleaned up.
Thanks again for the input fdrgator and Boobie!
 
Piggying back up on this old thread to ask the pros' advice on this motor.
I ran it this last weekend, and for starters it wouldn't start. Took the cover off, and got it started by pushing down (again) on the throttle linkage back and forth all the way, but it took quite a few cranks before it finally decided to go.
Then the good news: It ran like a champ for the whole time I was on the water (about 4 hours), with full power, smooth idle, and running great everywhere in between.
I was going to turn it off at one point to go diving, but I got scared that it would not want to start again and I was far away from the ramp, so I kept going, and when I got back at the ramp, I turned it off, waited a few minutes and just for peace of mind, went to start it again. Same as earlier. Except this time I didn't have to activate throttle linkage, but took a bunch of electric start cranks before I got it to go. Went back out, this time stopped way out in the open to dive, thinking I will probably have a hard time starting it back up, but eventually will.... Sure enough after getting back on the boat, same difficulty and same long cranking attempts before getting to go.
Back to the ramp (about an hour later) after it ran like a champ again.
Then when I took it out of the water, I saw the same "goo" that prompted my original post on this thread, coming out of the prop. It looked exactly like the bottom pic on my first post.
I'm thinking it might be the result of the many cranking attempts, and the resulting unburned mix coming out through the exhaust?
So what are the experts recommendation about this hard time I have starting?
The funny thing is once I got home and hooked up the ears on it to rinse it, it fired first crank and again ran perfectly and idled as long as I wanted it to.....
I'm thinking ignition, but I don;t want to mess with anything unnecessarily, because I really love how it runs (after getting it started that is) :)
 
WHY I GOT GOO?!!!!! (LOL)
Now I wonder if it could be the oil I'm using, or the mix ratio, because for the first time I saw that same light brown goo coming off the prop of my other motor, a 79 Evinrude, (which is starting and running to perfection)?
I use the Johnson/Evinrude oil at a 50:1 ratio, is that wrong?
 
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