what's a "flooded carb"?

It means the Carbs are flooded.

The Carbs

No that's a flooded filter box.

Flooded carbs

 

Really? Unless you've got carbs with injector pumps I can't see it making
any difference.

As all you are doing when you turn the throttle is moving a slide/butterfly
valve I don't see how this floods the engine without it running.

 

Keelworm wrote

They don't do that on modern carbs do they?

I thought the accelerator pump jet was old hat on cars, let alone on
bikes.

 

Only time this has happened to me has been when the carb float(s) is/are not
working properly[1] so fuel keeps trying to fill up the float bowl at a
higher rate than you are using it.

Fuel then forces its way past the needle and stuff and chokes up the engine.

Dave

[1] Either the float(s) is/are holed or incorrectly set.

 

I keep hearing this term: what does it mean? what is it that is flooded?

The reason I ask is that my bike coughed and died the other day.
Full tank of fuel I tried spinning the engine half a dozen times with and
without choke. Then I noticed drips of petrol coming from near the air
intake. When I opened the filter box it was swimming in petrol which I had
to drain off.
Is that what a flooded carb is? what else might suddenly cause this
problem?

 

Keelworm wrote

Poorly adjusted/seated floats.

 

But that's because SOCs have an extra jet in the carb which, when you pump
the accellerator squirts extra fuel in to compensate for the lag you'd
otherwise experience in such a low revving engine and give instant throttle
response. Not seen a bike yet that has that kind of set up...

Neither the CG nor the ER have flat slide carbs so, like mups says, all
twisting the throttle should do is move the butterfly. Maybe yr little
cousin's a sneaky bastard and used to carry 20ccs of 4 star round just to
lob in the intake of yr bikes when you weren't looking to confuse you...
)

Dave

 

Umm yes, but you have a float and a needle valve to stop too much fuel
getting into the carb.

Can't comment on SOC as I can't remember the last time I had a non FI car.

 

Keelworm wrote

After you have spent a weekend checking everything is ok with the carbs
and finding out that in fact it was and you have wasted your precious
time and money for no good reason: get in the habit of turning the fuel
off when parking it for a long period and, of course, turning the ****
back on again before you ride.

Eh?

 

Keelworm wrote

This seems to be a well known phrase or saying.

I don't actually understand it.

I did a couple of weeks on a bindit 6 and found it quite a nice bike to
ride. Perhaps it was the "A bit of a handful for slow commuting" where
the top heavy makes it's mark.

 

As it happens the bike is an ER5 & it is a gravity fed carb.

 

Well, as most of the other replies have not managed to explain properly.
Most bikes have constant vacuum carburetters, these are the ones with
the pistons in them. These do not have a throttle pump in them, so
twisting the throttle does not put any fuel into the engine.

There is also the constant venturi carburetters which do usually have a
throttle pump in them, although these are very rare on bikes, so I can't
say whether they have a pump or not on bikes - most older cars do.

The most likely cause of fuel flooding into the engine is because the
needle valve on the float is worn or stuck, and is allowing fuel to
continuously flow into the carburetter.

 

Nice!

 

Have him killed.

 

Any with Dell Orto PHM carbs [1]. (Guzzi, Laverda, Ducati ...)


[1] except mine as the pumpers have been blanked off. Don't know why.