1964 Johnson 18HP carb Leaking Need Help!

[oldfarmall]

Hi-


Just rebuilt the carb on my 1964 Johnson 18HP motor. Put new needle and seat, float, gaskets and cleaned carb and also blew out with compressed air. Went to fire up the engine today, and primed the fuel line bulb and gas pours out of carb throat. Took carb apart, thought the float was not working, everything seems fine. Readjusted float and it still does the same thing! doesn't appear to be hanging up. Had carb apart about 15 times today and can't figure out. This carb has the fixed high speed jet I believe. This is where I think the gas is comming from. Maybe I lost a part when cleaning the carb, not sure. Looked at this for hours today and I still can't figure out why the gas is pouring out. If anyone can help me with this it would be greatly apreciated. When you squeeze primer bulb, shouldn't it get hard and the float then stops the flow of gas? Thanks!

Jesse

 

[lindy46]

Re: 1964 Johnson 18HP carb Leaking Need Help!

With the carb off the engine, put a small hose on the fuel inlet so you can blow on it. Invert the carb and blow - air should not get through if the float is working and not hanging up, and the needle is seating. Turn the carb right-side up and air should flow freely.

 

[oldfarmall]

Re: 1964 Johnson 18HP carb Leaking Need Help!

Thanks Lindy46. I also tried this and it works as you said it should. Upside down when you blow on it, the flow can't go through. Right side up air goes through when I blow on it. I am stumped!

Jesse