The Famous Grouse
Petty Officer 1st Class
- Joined
- Sep 26, 2008
- Messages
- 291
Hi everybody,
Thanks to previous advice I did a total carb teardown and thouough cleaning on my 1988 15 HP Johnson. It now runs much better and it will allow me to throttle down without dying. I found a mass of some kind of fibers like wool wrapped around the throttle plate, so I assume there was probably other grit/junk in the carb as well.
In the process of verifying that the carb fix worked, I ran the outboard in my "test tank" for about 10-15 minutes. My test tank is a plastic garbage can and I'd estimate it has 15 gallons of water in it.
Now I've got an new situation that I'm worried about: When I got done running the engine in the test tanks, I noticed there was an oily, frothy gray goo on the surface of the water.
When I poured the water out of the tank, this gray slime was clinging to the sides of the tank and there was also a slick of it built up inside the prop hub. It's like a very thin wet grease.
Then last night I noticed that this wet goo has continuted to drain out of the engine and a small pool of about 1/2 cup of it was on the floor beneath the engine. It looks like this little pool drained out of the exhaust hub.
What is this gunk? Is this normal for a 15 minute test run or do I have some kind of major issue here?
Maybe this is normal because the engine is recycling the water, so in my mind this could be just combustion by product. But with that said, it seems to me to much more than I'd expect, but I've never done that much tank-testing of a running outboard before. Mainly when I test an outboard, I run it on the garden hose for a few minutes.
Is this normal?
Many thanks.
Grouse
Thanks to previous advice I did a total carb teardown and thouough cleaning on my 1988 15 HP Johnson. It now runs much better and it will allow me to throttle down without dying. I found a mass of some kind of fibers like wool wrapped around the throttle plate, so I assume there was probably other grit/junk in the carb as well.
In the process of verifying that the carb fix worked, I ran the outboard in my "test tank" for about 10-15 minutes. My test tank is a plastic garbage can and I'd estimate it has 15 gallons of water in it.
Now I've got an new situation that I'm worried about: When I got done running the engine in the test tanks, I noticed there was an oily, frothy gray goo on the surface of the water.
When I poured the water out of the tank, this gray slime was clinging to the sides of the tank and there was also a slick of it built up inside the prop hub. It's like a very thin wet grease.
Then last night I noticed that this wet goo has continuted to drain out of the engine and a small pool of about 1/2 cup of it was on the floor beneath the engine. It looks like this little pool drained out of the exhaust hub.
What is this gunk? Is this normal for a 15 minute test run or do I have some kind of major issue here?
Maybe this is normal because the engine is recycling the water, so in my mind this could be just combustion by product. But with that said, it seems to me to much more than I'd expect, but I've never done that much tank-testing of a running outboard before. Mainly when I test an outboard, I run it on the garden hose for a few minutes.
Is this normal?
Many thanks.
Grouse