I have an '80 ea71, with weber 32/36 on it. Recently when it does a warm start 10 minutes after I shut it off I have to floor it to get it to fire up. Is it the choke or does the carb need rebuilt?

Verify the choke is working properly. 

When the engine is cold, it should snap closed when you pump the gas once before turning the key.

Once it has warmed up, [and as it warms up] the choke should open. 

On a warm start, it should not be closed tight again, or not at all, depending on the temperature.

 

I'm not sure if the choke is manual or electronic but here's a pic of it. When I started it this morning, I pumped it once and nothing happened. What are my options.

Hitachi

Aren't those manual choke ? There’s not a pull knob on your dash somewhere ? 

After you pumped it, look and see if the choke closed.  Take the air filter off.  That's if it's an electric  / automatic choke.  If it's manual,  there has to be a pull knob on the dash somewhere. 

Edited December 13, 20196 yr by DaveT

I pumped it once and nothing happened. I took the filter off and closed it by hand and it fired in one crank. I'm not sure that it is even wired right. Would you know what wire it should be if I sent you a picture of the wiring around it? I know there is no electrical attached to the gas pedal itself. That means that the choke is engaged through the carb itself. Does that mean that all that the choke needs is power?

Edited December 13, 20196 yr by Marks02
Lack of info

10 hours ago, moosens said:

Hitachi

Aren't those manual choke ? There’s not a pull knob on your dash somewhere ? 

It's a weber.

Edited December 13, 20196 yr by Marks02

The automatic chokes I have dealt with have a thermally sensitive spring that when cold, will snap the choke closed when you tap the gas pedal before cranking.   They also have a wire that get 12v when the engine is on that runs a heater near that spring,  that makes it relax, opening the choke as things warm up.  The round part facing the camera in the picture above might be it.

Yes I know it’s a Weber.

 

You asked for options and that was my reply. Hitachi

 

Then I asked a question you haven’t answered. 

It had the stock Hitachi carb on it that was an auto choke.  No, I don't have a choke pull nob on the dash.

Pretty sure that’s an electric choke. If I’m not mistaken, you should have power on that wire going to the carburetor when you turn the key to the on position.

I'll get a test meter and check it out. I've also figured out how to do the choke manually. I have to open the hood and close it but it works a lot better now. It'll choke it to 2500 rpm.

Ah, that indicates the thermally sensitive spring is broken, stuck, or way out of adjustment. 

Take the three screws out and see if the spring is ok. It is on the inside of the cap. Maybe the spring is distorted and got on the wrong side of the lever. While the cap is off, make sure the lever easily closes the choke plate.

When it is cold you turn the cap until the choke closes. If it has notches on it go one more notch and tighten the screws.

Other models had water pipes on that cap.