1973 50HP 2-stroke - Bit of fuel oozing from carburetor port/vent (starboard side)

EricJRW

Chief Petty Officer
Joined
Feb 3, 2010
Messages
488
I recently rebuilt the carbs, and now my motor runs tip top. But after going for a run, and then looking under the cover to make sure everything looks OK (I was mostly worried about the new fuel lines staying attached) I noticed that a bit of fuel was oozing from the starboard port of the lower carburetor.

I forget where this port/vent (not even sure of correct term) connected to, but I do recall they went into the bowl. There were two holes in the top of the bowl, one was plugged (I think this one) and one was not.

I did not observe the port/vent while the motor was running, so I'm not sure if it's from idling or running.

Both carbs were rebuilt at the same time. and I feel reasonably confident I did both identically.

Any idea on what may be causing this?

You can see the red-ish premix fuel at the port on the lower carb.
IMG_1900.jpg
The port in question is on the lower carb, just below the upper carb's bowl.
 

Daviet

Fleet Admiral
Joined
Sep 24, 2008
Messages
8,958
Re: 1973 50HP 2-stroke - Bit of fuel oozing from carburetor port/vent (starboard side

It looks like it is leaking out around the core plug, did you replace the core plugs when you overhauled the carbs?
 

EricJRW

Chief Petty Officer
Joined
Feb 3, 2010
Messages
488
Re: 1973 50HP 2-stroke - Bit of fuel oozing from carburetor port/vent (starboard side

No, I did touch the core plugs. I'm 99% it's the vent. I will be investigating further this weekend (tomorrow).

I'll get better pictures too.
 
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