Carb question

My 225 has a roch 2g. When I put the brakes on the engine stumbles and wants to stall unless I flutter it. It also has a hole on top that I don't quite understand. If I cover the hole with my finger the engine instantly dies. The idle mixture screws are out a lot. I don't think this is the right carb. Should be a mechanical choke on the left. It has a kit on the old heat choke on the right. It also needs to be at about half choke to run good. Any advice would be awesome!! Thanks
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The hole on top is the bowl vent and, if you put your finger over it then no fuel can get into the carb and yes the engine will die. I think your carb is off a commando, they had the Jeep style linkage like you have, and the auto choke.

 

All the reconditioned carbs I see online show that vent hole closed. And what would make the engine want to die while braking? Any ideas?

 

Are you talking about the dash pot that does nothing? It actually adjust my idle. No skrew,just turn the dash pot!

 

Do you have power brakes? Is the vacuum booster diapragm leaking?

 

No power brakes! Manual

 

Forgot to mention,idle a bit high. Won't stay running when I turn it down!

 

It looks like a 2GC converted to a manual choke. I've run them without a dashpot and your idle speed adjustment screw is to the right of the shiny new stud and nut in the 2nd photo. As stated, that hole should not be there. The actual float chamber vent should be inside the top of the carb so it's in filtered air.

 

Well,theirs nothing in front of that screw for it to adjust anything. I think things have been taken off over the years. I may just buy a remanufactured carb specific for the jeep 225!!

 

The fact that your Jeep will not idle may be due to an air intake leak somewhere -- Carb base gasket, intake manifold leak, a disconnected or rotten vacuum hose, etc. Still could be internal to the carburetor, too.

 

I just watched a video on rebuilding one. I learned that there is a small ceramic type filter at the inlet. When I got the jeep the tank was horrendous and full of brown rusty stuff!! PO was running it this way. I dropped the tank and cleaned it well,new filter etc. I'm wondering if that little filter is somewhat clogged and is starving itself of fuel. Tomorrow I'll take it out and see how she does. If that's it I'll get a new one. I get two good jets of fuel with the pump so that's good.

 

Well,no little filter. That's not my problem. It's got a good fuel pump and a new intake manifold gasket! All vacuum lines seem good and accounted for. I'm at a loss!!! Maybe a float issue starving it for fuel?

 

I'll check but there are only two vacuum hoses. One for advance and one that goes to the back base of the carb from the passenger side valve cover. Advance works great and as it should!!

 

Alright...no vacuum leaks that I can find. Spayed carb cleaner all over the intake and lines. No change in running. I know the exhaust manifolds are good because I just replaced the gaskets. I'm at a loss. I ordered a pertronix ignition so that will go in this week. Just seems like not enough fuel or too much air. I have the original air cleaner but with the heat choke on the carb in won't go on. Does anyone have a source for a one inch spacer for the 2gc carb. Then I could use it instead of that stupid little thing on there now?

 

A 2G top will replace that 2GC top and you can do away with that auto choke and go normal with the manual on the proper side. That will make your oil bath cleaner work. You need to get the fast idle cam and special screw and do away with the dash pot. you will also need the choke pull-off rod from the fast idle cam up to the choke assy. Or do like you say and spring for the proper carb.