Burnt fuel pooling?

[Jhayes780]

Sorry I know everyone is probably sick of my questions by now but. I have an 83 Suzuki outboard 85hp motors that when I run in a trash can full of water it appears to run great. But when I stop running it, it looks like there’s a bunch of burnt fuel on the top of the the water it’s been running in. Any suggestions as to what this could be?

 

[saltchuckmatt]

Sorry I know everyone is probably sick of my questions by now but. I have an 83 Suzuki outboard 85hp motors that when I run in a trash can full of water it appears to run great. But when I stop running it, it looks like there’s a bunch of burnt fuel on the top of the the water it’s been running in. Any suggestions as to what this could be?

Unburnt oil and gas, totally normal.

 

[99yam40]

over oiling maybe or one or more cylinders not burning fuel properly

 

[saltchuckmatt]

over oiling maybe or one or more cylinders not burning fuel properly

Older 2 strokes will leave lots of residue so that's a tough one. If it's running well, and a smaller bucket than I would say totally normal.

 

[99yam40]

sorry, just notice he said burnt fuel and oil, not unburned.
so that burned fuel and oil comes out the exhaust

 

[Jhayes780]

I mean it’s dark so I’m assuming it’s burnt. The water also appears to be coming from the exhaust and not the telltale, but there was definitely some dirt and debris in the hole. So I’m hoping that was it. This engine appears to run well just trying to fine tune it I guess

 

[Jhayes780]

this is where it’s coming from. Any idea what screw or what to do to stop it.

 

[saltchuckmatt]

View attachment 369376this is where it’s coming from. Any idea what screw or what to do to stop it.

I don't see any evidence that something is coming out....did you wipe it off? Your post said motor was running good, so if something is supposed to be in there than it would run rough.

Sorry, I'm not familiar with that motor.

 

[saltchuckmatt]

View attachment 369376this is where it’s coming from. Any idea what screw or what to do to stop it.

I looked at these carbs that are listed on eBay and see the open holes except maybe the bottom. Could be like a round bearing (plug) is supposed to go in there.

 

[Jhayes780]

I wiped it off and observant coming out of that hole when the engine is running it is not burned

 

[saltchuckmatt]

I wiped it off and observant coming out of that hole when the engine is running it is not burned

Is that the bottom carb? Hard to tell from picture. What happens if you plug it while running? If it runs good time to MacGyver something.

 

[99yam40]

looks to me that hole is above the fuel bowl level, so fuel should not be that high.
might check the float and needle and seat to see why it is over filling

 

[Jhayes780]

Is that the bottom carb? Hard to tell from picture. What happens if you plug it while running? If it runs good time to MacGyver something.

Will try it tomorrow and let you guys know. It looks threaded on the inside.

 

[Jhayes780]

Will try it tomorrow and let you guys know. It looks threaded on the inside.

Ok so I covered it, it still has a leak at the bottom of the carb. Any idea what it is? Stuck float or needle? Any good articles or step by steps on how to clean this?

 

[Jhayes780]

looks to me that hole is above the fuel bowl level, so fuel should not be that high.
might check the float and needle and seat to see why it is over filling

I’m a complete noob when it comes to working on engines. How would I do this