Supposed to. If those are blocked up, the fuel won't have any choice but to continue doing the carb until it runs out of the throat, forward to the engine or back towards the filter.
It should.If the floats aren’t seating it comes out of the overflow?
I think you're right about the fuel being expelled the exhaust, but the only way for fuel to exit the intake valves is if the piston is rising when the intake valves are open. And that doesn't happen.Guys basic engine operation, if proper amount of fuel is introduced to the cylinder and even if that cylinder does not fire, that same amount of fuel will be compressed out of cylinder into exhaust.
If we have SO much fuel that is pouring out of intake boots than we have exorbitant amout of fuel which is filling the cylinder and time during exhaust valve is open at exhaust stoke is not enough to purge it thus fuel is filling the jug and got nowhere to go but out of intake boot.
My 2c
Very tru guy.Guys basic engine operation, if proper amount of fuel is introduced to the cylinder and even if that cylinder does not fire, that same amount of fuel will be compressed out of cylinder into exhaust.
If we have SO much fuel that is pouring out of intake boots than we have exorbitant amout of fuel which is filling the cylinder and time during exhaust valve is open at exhaust stoke is not enough to purge it thus fuel is filling the jug and got nowhere to go but out of intake boot.
My 2c
It would really be great if you would stop telling people to do this. Thank you.Spray 4 seconds starting fluid into air box.
True that doesn't happen but how we end up with fuel coming out of intake boots when piston on intake stroke creates suction!?I think you're right about the fuel being expelled the exhaust, but the only way for fuel to exit the intake valves is if the piston is rising when the intake valves are open. And that doesn't happen.
My suggestion was the intake valves open to let fuel in but then close too soon and leaves fuel in the intake boot. It's just a thought.True that doesn't happen but how we end up with fuel coming out of intake boots when piston on intake stroke creates suction!?
Good question.True that doesn't happen but how we end up with fuel coming out of intake boots when piston on intake stroke creates suction!?
Vacuum petcock is pluggedGood question.
Maybe not strong enough to really vaporize the fuel like a running motor would?
I’ve never looked, one wonders what rpm a starter throws.
On the overflow thing.
If he’s got a vacuum shutoff petcock,
and it’s working, the carbs might not overflow without engine running.
He cranks it, vacuum is created, petcock opens, the out of adjustment or bad floats
flood the motor.
Just thinking out loud guys.
Cylinders 1 and 3 spark plugs are black
2 and 4 are only slightly dirty
Vacuum petcock is plugged
I don’t have a tank on atm so I’ve got a fuel syringe feeding straight into the carbs, nothing stopping it flowing into the carbs except the floats