Johnson 150 running issues

[THEFERMANATOR]

Originally Posted by jasoncooperpcola

I just looked up a parts diagram for the carbs. The jets i am cleaning are #5 correct?

#5 and #15 need to be cleaned inside as well as checking teh ports that go from #5 down to the bottom of the float bowl. And check #3 while you have it apart to make sure they are clean.

[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.

Below is a picture of the bowl.

[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.