Johnson 150 running issues

[THEFERMANATOR]

Originally Posted by jasoncooperpcola

I took the top carb off this morning and was amazed at what i found. Both #15 was clogged with a thick green crap. The bowl has a puke greensih film in the botom and in the passages #5 to #15. How can i clean this plastic bowl without harming it. O'reillys had nothing that would work. After seeing this i am surprised the engine ran at all. I figured i would blow everything out with compressed air. So far i have #5 #3 #15 jets from the top carb soaking in cleaner.

They should be metal on an 85 150 as that is the old style cross flow engine. As for cleaners, I use EVINRUDE engine tuner in teh gallon jug to soak them. I also have an ultrasonic cleaner that I use if they aren't that bad.

[jasoncooperpcola]

These are black plastic bowls. i have been soaking the jets in a carb cleaner i got from o reillys in a one gallon can. While i have them apart, what is the float drop measurement?

Below is a clean jet next to a dirty one.

[jasoncooperpcola]

So whats the best way to clean plastic carb bowls?

[THEFERMANATOR]

You can soak them in SEAFOAM for about 20 minutes and see how much comes off. DO NOT use carb dip as it will eat the plastic. I personally use EVINRUDE engine tuner in the ultrasonic dip tank.

[Skools Out]

i've always used a 50 / 50 mix of mineral spirits and lacquer thinner. i use that on the whole carb assembly including the plastic parts too. then blow it all clean with the air compressor.

[randlemanboater]

WD-40 seems to work good on plastic too.

[jasoncooperpcola]

There is a marine program at George Stone where i am taking welding. I am going to let them do carb kits on all the carbs and clean the bowls so hopefully there will be no more issues. After they do carb kits, they will put my outboard on the dyno and see what it puts out.