Johnson 4 hp Carb not sucking fuel

[mckibben23]

Hi Folks. I have a 1990 Johnson 4 hp that I bought recently (not running) with a suspected carburetor problem. Having fixed carbs previously I stripped this down, it looked very clean but I cleaned it again. The issue is that fuel is coming to the carb but not through it.

The float did not looked balanced and the pin was clipped through a hole in the arm of the float so I sorted that out, and got the float level. When I put it all back together and try to blow through the carb's fuel in-take it's blocked. When i remove the pin (from the seat in the carb bowl) I can blow fine through it.... the pin looks new, the float looks fine... is it possible that the seat for the pin is too tight? is there another way to adjust this/

Slow/Idle adjustment needle needs a new washer but I've put in one that should work okay, so I dont think that's a problem. Also when I spray gas into the carb it turns over ok... I've also confirmed that there is fuel coming to the hose attached to the carb's fuel intake. Any ideas?

 

[Vic.S]

Ive answered this I am sure on another forum

You should be able to blow gently into the fuel inlet if the carb bowl is empty

When you say "pin" you are referring to the float needle valve? Part of #12 in the diagram below

If so make sure it is fitted pointed end into the seat and that it is clipped to the float arm with the little spring clip #14. This clip mikes sure that the needle is pulled off its seat when the float drops. Soft tipped needles are inclined to stick otherwise.

 

[mckibben23]

Hi thanks... got it fixed... I had it fitted correctly, with the float level (upside down) as recommended BUT with the float bowl secured, the float did not drop enough for the pin/needle to release. I had to make a double kink in the float arm so that the arm was pressing less against the tip of the pin (but it's all worked now). thanks for your help.