what's that hole for? 59 evinrude lark 35hp

[nineteensixtycaddy]

Ok, somewhere I read about this, but I'm not having any luck finding it now. Heres the issue. 1959 Evinrude Lark 35 hp. Spark fine to both cylinders. Carb leaks a lil bit, but seems ok. Engine runs ok, will rev great in neutral, but bogs in gear. Heres whats wierd that i read before, and i dont remember the solution. If i put my finger over the little hole on the front of the carb, it revs up great and has plenty of power, but as soon as i take my finger off, it bogs. Any ideas??????

 

[HighTrim]

Re: what's that hole for? 59 evinrude lark 35hp

Time to clean and rebuild your carb.

 

[tomhath]

Re: what's that hole for? 59 evinrude lark 35hp

If i put my finger over the little hole on the front of the carb, it revs up great and has plenty of power, but as soon as i take my finger off, it bogs. Any ideas??????

You're covering the air intake? Same as closing the choke. "Carb leaks a little" might mean air leaks are causing it to run way lean.

 

[HighTrim]

Re: what's that hole for? 59 evinrude lark 35hp

He is covering the vent hole.

 

[Vintin]

Re: what's that hole for? 59 evinrude lark 35hp

I though I'd heard mentioned before that one of the little holes on the front of the carb provides venting for the float bowl. A friend had mud daubers plug his and it looked like it was a part of the casting and his motor ran bad for some time before his discovery.

 

[nineteensixtycaddy]

Re: what's that hole for? 59 evinrude lark 35hp

Yes, its some kind of a vent hole, and its strange in that it runs better when its plugged with my finger. Still think carb rebuild?

 

[Joe Reeves]

Re: what's that hole for? 59 evinrude lark 35hp

Nah... just keep your finger over that hole. Clean and rebuild the carburetor!