Johnson 150 oily residue leak

[gman 92 johnson]

I have a 1992 Johnson 150 Silver Star Series, unknown total hours, but I know I have put over 200 on it in the past 3 years..Have a little leakage problem..after running the engine the past few times(average 3 hrs) engine runs fine ,starts fine, put after shutting it down it will leak an oily residue out of the cowling, leaks more when engine is tilted for towing..residue is green oily film, thicker than the pre-mixed gas I run(50-1)carbs don't seem to be bogging down like floats are stuck or needle and seat stuck..but it will leave a trail of oil down the front of the lower shaft housing down to the cavitation plate..I have rebuild the carbs in the past year and had to clean 1 or 2 when the needle and seat got stuck and they free-flowed...any ideas what I should specifically look at or for or should I just rebuild all the carbs again..there was a little bit of gas mix drip hanging off the bottom of a couple of the carbs when I pulled the cover off after last weeks useage...any insight would be appreciated...

 

[papyson]

gas in the mix evaporates..the oil in the mix dont....thats probably what you are seeing ...fix what you see..the dripping carbs...to verify thats what it is try running the gas out of the carbs when taking the rig out of the water...

 

[gman 92 johnson]

Thanks, I will clean out the cover before running them on the muffs, then try and see which carb(s) is leaking and then turn off the fuel, if any are leaking should be able to see which ones it is while it runs, then let it run out then tilt it and see what it does, probably will have to do all 6 knowing my luck.. will post back after
I get to check it, may be a day or two..