Screamin283
Member
Its a 1961 Evinrude Lark III 40hp. Model #35524
Just finished a rebuild of the carburetor, using Johnson/Evinrude carb kit 439074. Carb was torn all the way down to a bare shell, soaked on carb cleaner overnight, and then cleaned with spray cleaner and compressed air. The welch plugs were removed for this.
Got it back together, making sure the float height was per the manual - meaning that with the carb upside down and horizontal, the float is sitting level. That's how my manual says to do it anyway.
But, when I get it back on the motor and squeeze the primer bulb, it leaks from this hole, circled in red:
I took the carb back off and tweaked the carb float, even though it was pretty much fine, and it had no effect on the problem. The primer bulb does get hard, so maybe this is some kind of overflow?
I also played around with the low speed needle, since its adjustable and it also had no effect on the problem. (Thats why the knob is off in the picture)
I am not very familiar with this carburetor, so any information is appreciated. Based on the experience I do have, it shouldn't do this, but this outboard is older than the ones I usually work on and I don't need to use a primer bulb on my '56 Chev.
For reference, I also replaced the engine's entire fuel system - all new fuel lines (all the way to the tank!), and a new filter, and I disassembled, cleaned and inspected the fuel pump.
Just finished a rebuild of the carburetor, using Johnson/Evinrude carb kit 439074. Carb was torn all the way down to a bare shell, soaked on carb cleaner overnight, and then cleaned with spray cleaner and compressed air. The welch plugs were removed for this.
Got it back together, making sure the float height was per the manual - meaning that with the carb upside down and horizontal, the float is sitting level. That's how my manual says to do it anyway.
But, when I get it back on the motor and squeeze the primer bulb, it leaks from this hole, circled in red:
I took the carb back off and tweaked the carb float, even though it was pretty much fine, and it had no effect on the problem. The primer bulb does get hard, so maybe this is some kind of overflow?
I also played around with the low speed needle, since its adjustable and it also had no effect on the problem. (Thats why the knob is off in the picture)
I am not very familiar with this carburetor, so any information is appreciated. Based on the experience I do have, it shouldn't do this, but this outboard is older than the ones I usually work on and I don't need to use a primer bulb on my '56 Chev.
For reference, I also replaced the engine's entire fuel system - all new fuel lines (all the way to the tank!), and a new filter, and I disassembled, cleaned and inspected the fuel pump.