Re: evinrude 3hp /what year?
Have a look at the fuel oil mix FAQ in the FAQ forum for details. What's said there applies doubly for the '64-67 3hp, which should never have been rated at 50:1 but was.
You are missing the intake silencer, which wraps around to the back of the outboard and the intake screen. Without the screen, I find that particular carburetor doesn't develop enough vaccum in it's venturi, causing the outboard to run bad. Some people take it off thinking it's a restriction and they'll improve the outboard.
There's a '52 parts diagram over at
www.outboard-boat-motor-repairs.com that's generally like yours so you can see what parts your missing.
