carburator ...or ignition? help on Hurricane

Please tell me what to do.

I have check the spark plugs, all correct.
Carburator (Solex) seems clean.
I have moved back and forward the Prestolite to try the best position.

the engine starts well, it turns slowly with a good noise.

When I put on the gas, there is a small empty hole, if I press to fast the accelerator the engine can stop.
If I press delicately, the engine goes on well.
Difficult for me to explain in english.
I start accelerating, ok, then I have to pass the hole, then I go on pressing on the pedal.
I have no Rpm to see, but I suppose idle, miminum is appros 800 rpm, then at 1000 I have a hole then I can go up without problem until 10.000 rpm ( it is a joke). No problem of power.

 

Hi Alan,

What you are describing we call a hesitation. The engine hesitates to accelerate, but once the RPM has successfully increased, it runs fine. It is frequently caused by a faulty accelerator pump in the carburetor (it's the part shown in your first picture, right next to the yellow oil fill cap). Remove the air intake tube from the top of the carburetor, so that you can look down the carburetor throat (with a light if it helps see clearly). While looking down the throat (with the engine not running), actuate the throttle rapidly by hand from the idle position all the way to the wide open position. If the accelerator pump is working properly, you should see a strong flow of fuel being injected into the carburetor throat as the throttle is moved. If the fuel discharge is absent, weak or just spitting, the pump is not operating properly and should be replaced.

Good luck,

 

To add, You should see fuel squirting into the carb as soon as you move the throttle.

 

To star, I understand that I must take off the top (air filter) and look at what happens when I push the throttle.
How fuel is coming inside.

I do it with engine not running and engine running?

Then I look inside the accelerator pump, there is something wrong.

Some parts to change or maybe cleaning something?

Or is it also about fuel sucking ? by the engine?

I thought to put a transparent pipe just before the carburator to see if fuel is coming with no air.

All this is subtle.

Thanks for help.

 

​My answer in RED.

 

Ok, thanks I understand slowly...sometimes I check for translation.
By the way, the word "hesitation" is the same in French, but only for people. Not for machines. Funny.
I understand that the problem to check is inside the carburetor, the pump system as on my photo.

I do this engine not running.
I look inside the throat of the carb after removing the air intake.

I am not a friend of carburators, I "repair" cars since my young days, say 1966 my first Citroën Traction Avant...
But a carburetor is magic, I don't really know the principes theory.
They were very clever to make such systems.
About the ignition I understand, when the spark must come, valves too. But carb, magic...

Thanks again.
I'll try to find the infos about my carb, before touching, and next time I meet my Jeep, action.
For info : my first car ...
http://en.wikipedia.org/wiki/Citroën_Traction_Avant

 

The Traction Avant === a great classic. Same era as the '34 Fords that we love here.

 

Sounds like you are not sure how to do what is being said. I will try to help. take off the air cover to the carb, with the engine off move the throttle linkage as you look down inside the carb. You should see a squirt of fuel as soon as you move the throttle linkage. If the squirt of fuel is not a strong shot, you should replace the pump. That is simple to do, it looks like there is 6 screws holding the pump housing on, take them out and pull the cover off. there is a rubber piece inside there that gets replaced, just pull it out and put the new in and bolt it back up. You don't have to take the carb apart to do this, just the 6 screws. Hope I understood and this helps.

 

Clearer is impossible; thanks very much.
It a strange problem this pump. I'll keep you informed, but not before 10 days.
I wait to be back to my country house and to my Jeep.