Dauntless Flooded

went to go start the Rover (Buick 225) this afternoon and after several cranks I got ignition, but then it stalled out and the carb was overflowing with gas...

The engine was all but trouble free till today... bad case of flooding? How long until I should be able to start it?

Side question but related... would a non vented gas tank add to the problem? I replaced the seal on the gas cap and now I’m certain I have a fairly closed system..

 

Most likely some debris in the needle & seat of the carb.

 

if it had the lake affect on bottom of intake . I would remove spark plugs and crank it over

 

Sop up all the gas, bang vigorously on the side of the carburetor with a screwdriver handle or such, and try it again. You have a float that is stuck open. Helpful if someone else operates the ignition switch while you watch the engine. Gas flowing out of the carburetor is a stuck float.

Gas tank vent is not related. You need a vent of some kind to relieve vacuum above the fuel, whether that be a vented cap or something else. The cap seal does not affect the vent through the cap. There is a labyrinth for vapors in the cap that does not involve the seal.

 

It’s a non vented cap.....

But on the carb... fresh rebuild with motor, float still likely to stick?

Going to try suggested remedies

 

You need a vent of some sort. If you do not have a vented cap, you would typically have a vapor recovery system that vents the tank remotely. You cannot operate without a tank vent.

 

Well a couple taps and it blew a bunch of unburnt fuel out the tailpipe.
Let or run till it warmed up.. didn’t want to idle on its own... will have to investigate that tomorrow...

 

A fresh engine is easily possible to get a stuck needle. Swarf or dirt, or even a piece of rubber shaved off when assembling a hose over a sharp edge. Any of these things and more can get lodged between the needle and seat, causing the carb to overflow gas. I've seen this a couple times on first time start-ups.
-Donny

 

All of the above, good luck!

 

Fuel filter in line?

 

Couple taps on side of the bowl and we had liftoff... had bunch of raw fuel out the tailpipe as well.

Drive around town today cleared everything out.. slight idle adjustment and were good to go.

Just need to perm address the fuel cap issue now.

 

Bought this gas cap off eBay a few years ago. Have had no issues with it. Ad said vented gas cap for 55-71 cj5 Jeep.

 

Take 2...



So this reared it’s ugly head again today. Ironically I stuck with a carb to avoid the fuel issues with injection...

Truck shut down while driving. Needed to tap the carb bowl and floored the accelerated.. got truck to start, but no idle and stumble with WOT...

Not being a carb genius what am I looking at here?

 

Still a piece of dirt. It’s just moving around in there. Take the air cleaner off, start the vehicle and while revving it to keep it running seal off the air inlet with your hand until it almost stalls. Then remove your hand (give it air) and revv to clear it out. You don’t have to rev high but this will flood the carb and help move the dirt out. You may have to do this several times. However, if it doesn’t do the trick you’ll have to tear down and clean the carb. This is my dads trick for working on carbs. Works a lot of the time for me anyways.

 

Time to pull the lid off the carb and clean it out!

 

That would make it run very rich but it shouldn't cause flooding.

 

Debris between needle and seat?, Float level incorrect?, Float has a hole in it?, Float catching on something,? Fuel pressure incorrect? Take it apart. Find out what's wrong.