put new kit in carb

still no gas to cylinders Help

This post was edited by tom levandoski on 08/24/2023 at 12:28 pm.

In what, please explain.

The IH 450? Are you getting gas TO the carb at all?

Ok so you put a couple new gskt. and neddle and seat in it and you call that REBUILT Nah not by a long shot as i have seen some pretty nasty carbs come across my bench . I like to soak the ones i do for up to a day in hot carb cleaner and we are not talking spray can stuff , i am talking take the hide off your hand stuff. Then it geet washed in boiling hot soapy water and a good rinse Then blowen out with compressed air and all passages cleaned with letter drill bits and torch cleaning drill bits for them tiny passages and blowen out again . Then it gets put together and the float level is set and checked and adjustments are BENCH set . So if you have gas in the float bowl and not getting to the engine then either ya have blocked passages still in the carb OR (1) you are not usen the choke , (2) you have a vac leak someplace between the carb and manifold and head (3) you have a plum wore out engine and it does not have enough suckem power to suck the gas UP and into the combustion chamber. Or you have more problems then that . Like a out of time cam due to a broken cam gear that you do not know about YET . Valves set to tight or stuck open or not opening at all. I am not there to see what is going on so just some ideas that i come up with.

I agree with your "no gas" idea. How about if he has someone squirt gas into the carb while he tries to start it. If ignition is good then the tractor should try and cough and stutter. That way is is still in the carb. If he has no flow then that goes back up the line to the bowl and the tank. Want to bet he has the neck on the bowl fixture where it screws into the tank is plugged? Happen on my CUB Had to carefully drill it out. MAGIC!

yes

IH 450 there is gas in he carb

Got gas in carb

Well, if you have gas in the carb, tractor vet pretty much covers the rest.....if the carb is clean, and if you have vacuum, it should get to the cylinders. The carb doesn't squirt the gas up there, it's gotta get sucked up there. Hold your hand over the air intake side of the carb while trying to start it, ya outta feel it suck.

First, let's assume there is sufficient fuel in the bowl. If any doubt, pull the drain plug and see what comes out. Should be a full flow until the bowl empties out, then slow to a stream. If it slows to a drip or stops, there is not enough fuel coming into the carb. Any doubt of what is in the tank? Catch what comes out, be sure it is pure, clean gas, no water, and is gas, not diesel or ?.

Make sure the choke is properly adjusted and is closing fully. Check the action of the throttle linkage, be sure the throttle plate is opening.

With the throttle plate open, choke open, hold your hand over the air inlet, crank the engine through. You should feel a fairly strong vacuum. If no vacuum, check the compression, valve timing, stuck valves, or major vacuum leaks. If there is good vacuum, there should be a few drops of gas now dripping from the air inlet. If yes, the fuel is getting through the carb. If not there is a problem in the carb.

Below is a link to a basic updraft carburator. Look at the main jet and main discharge jet. All fuel flows through this circuit. Check for restrictions or improper assembly. Don't worry about any of the other circuits for now, get the main circuit working and it will at least start.

http://l-36.com/Atomic4/a4manp07.jpg

Did it run before you took the carb apart?

Yep, soak in the good carb cleaner, cold metal parts cleaner, as said...I made the mistake of reaching in un-gloved, once, decades ago. The good stuff is hard to find, but my hand was near twice the size, pickled white, with flesh rubbery and about to peel off. Near instantly. Good for parts, not good for your hands.

Remember, it only takes fuel, air, spark, and compression for a gasoline engine to run. Isolate the problem, then address accordingly.

I once pulled spark plugs, sprayed ether into combustion chamber, re-installed plugs quick, it fired.
Problem was, engine was so wore out, it couldn't suck fuel anymore...No Compression...stuck closed intake valve, and worn out cylinders and other valves. That's worse case scenario.

Go back thru the basics, shoot some ether or gas as said already, find out if it's fuel, ignition, or compression.

BTW- a guy checked his plugs for spark by holding them grounded next to plug hole. PLENTY of fuel, the spark ignited the fuel, (ign good), burnt his truck and garage down.
Fire Dept had to respond.

Verify everything, then get it all working together at the right time.
Oops-talked too long, ain't posted for awhile.

This applies to me, take no offense, the acronym 'KISS'
Keep It Simple, Stupid, I always stress n think its a major, then realize something ez.
That's really generalized, generic, not specific thoughts,
hope it helps.
Best of luck

Carburetor cleaner is a strong caustic, lye, it will easily remove skin.

Thanks I like the one about burnt truck and garage down was not funny for him but sounded funny at the time. Thanks for the info.

is this the link http://-36.com/atomic4/a4manp07.jpg for looking at the carb.

Your info was the best help Got it running and runs like a gem Thank You!!