72 Johnson 50 hp sounds sick

[speedoflite2]

I have a 1972 50 hp Johnson dual carbs. Motor ran fine but had electric choke issue. Fixed that issue and put boat in the water and fired but was sounding real sick. Replaced plugs and ran fuel treatment in the tank and sprayed carb cleaner in carbs while running. Not a whole lot of carb cleaner. I have tried adjusting the carb mixture and while it does make it run better still sounding as if its on one cylinder. I felt the wplug wires after running it and one was warm and the other was cool. I checked for spark and have plenty of spark on both cylinders yet the top cylinder plug looks brand new still and has no trace of gas or oil on it and is dry while the other plug is wet with oil and gas mix. So am I correct that one carb goes to each cylinder and my top carb is plugged????? PLease let me know any ideas. Thinking I will have to pull both carbs off and cleasn real good. Thanks in advancefellow boaters.





1974 15' Ebtide trihull with a 1972 50 HP Johnson on back.

 

[jtexas]

Re: 72 Johnson 50 hp sounds sick

first, remember that your motor gets its motor oil from the gasoline. Carb cleaner sprayed down its throat goes right past the jets and tiny passages that need cleaning, straight into the cylinders, where it does exactly what it's designed to do: strip all the oil off of metal surfaces until they are squeaky clean. If you wouldn't run your motor without oil, don't run it on carb cleaner.

Dry plug on top does seem to indicate a fuel delivery issue, but I prefer not to guess -- compression test and spark test first,
http://forums.iboats.com/showthread.php?t=188767

then, if those check out, carb rebuild.
http://forums.iboats.com/showthread.php?t=244013

 

[speedoflite2]

Re: 72 Johnson 50 hp sounds sick

Yes I know about the carb cleaner thats why I put in the post a little bit of carb cleaner not alot.

 

[speedoflite2]

Re: 72 Johnson 50 hp sounds sick

pulled carb off today and cleaned them had stuck needle on the top carb. Runs like a champ now and set the mixture perfect.