Sir Tripower

Hi folks,

I'm still working on a perfect set-up for my Tripower-carbs. I found out, that after a few days of standing, the fuel-level in the center-carb sinks, so it needs a few seconds for the fuel-pump to fill the fuel-bowl until engine fires up. There are no outer leaks on the carb. So the question is, where does the fuel dissappear?

Another question is, what is the result, if fuel-level in the bowl ist too high?

And: I'm still searching for a correct metering-block for my cc (# must be 5257) and a fuel bowl for the secondaries. Has anyone an adress for me? I've tried out all the advices I've got here, but with no effort. Member "lars" ony rebuilds Quadra-Jets and Allstate Carburetor can't help neither .

Regards from Germany

Gerrit

pltmgr

Where does the gas go? It could be evaporating. If my "old" cars sit for a while I prime them thru the air horn with gas from a sueeze bottle. You may have have an internal leak however. Look down the throttles for any wetness.

Fuel level too high may result in flooding.

Sir Tripower

There should be no internal leaks neither, because I replaced all seals (using the good blue ones). I can't find any wetness beneath the throttle-plates.

What does "flooding" mean - and how will it make noticable?

Gerrit

MelWff

I guess it depends on what you mean by a few days, two days or a full week?
How far does it drop, can you still see the gas looking into the bowl?
You are sure the four bowl screws are tight?

Sir Tripower

I drove the car last Sunday and looked at the fuel through the sight-plug today. Seems, that the level was about 3 mm beneath the edge of the plug-hole.

The 4 plugs of the bowl a tight. Anyway I think there must be wetness noticable on the outside or beneath the bowl, if there would be a leak.

Gerrit

MelWff

I would say 3mm is not a problem. You turned off a hot engine last Sunday with hot carburetors, it evaporated.
Concerning starting, is your choke adjusted per the recommendations in the factory shop manual?

JBrooke825

I swear mine starts different all the time. Maybe your choke is not closed.
I like to see mine a little below the opening. No smell of gas is good.

Sir Tripower

What does "flooding" mean - and how will it make noticable?
Gerrit

sug

Flooding is to much fuel in the air fuel ratio mixture and wont burn properly so stalls out due to flooding.

Sir Tripower

But how does the "overfuel" comes into the intake? I guess, the only way should be through the nozzles in the metering-block. And therefore it shouldn't matter how much fuel is above them.

I guess, I'm wrong - but why?

Could anyone explain to me?

Gerrit

derekderek

true flooding the fuel overfills the float bowl and squirts out the vent hole right in front of the choke plate. too high a float level. https://www.ebay.com/itm/Proform-671...EAAOSwtx1ctzcR look at the pic of the metering block. the 2 vertical rows of 4 holes. those holes go into the main fuel feed for the 2 main jets. the holes are for supplying air to be mixed with the fuel. in most cases 2 or 3 air bleeds are used and the rest blocked off. too high a fuel level and there is no air to mix to atomize the fuel better. this is an aftermarket metering block with a whole bunch of holes so it makes a better visual aid than a stock plate.

Sir Tripower

I can't find any fuel leaking out the vent hole (guess you think of the hole, that is covered with that rubber-hat at the end of that small linkage in front of the air-horn).

Gerrit

derekderek

this pic is a marine carb. they make the bowl vents go up and bend over so flood fuel goes down the carb throat. https://www.holley.com/products/fuel..._campaign=Bing Shopping - Holley Carburetors - Brand&utm_term=4575686359322926&utm_cont ent=Holley - Marine Carburetors