Romper
ArboristSite Lurker
Husky 440 runs poorly only with choke on. Won’t take throttle without dying. What’s is up with this problem?
Carb problems
- Thread starter Romper
- Start date
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Need a bit more history, how long has it sat since being last used, or did it just start doing this after running fine etc.
I would start with a carb clean and check the main delivery fuel nozzle (where the fuel enters the venturi ) for a stuck one way valve, dont use compressed air, you can damage them.
get some small vac hose, and place it on the metering side of the fuel delivery nozzle (once apart), and check you can blow thru it, but not suck back using your mouth.
Some fresh fuel, and a bit of movement back and forward will often get them unstuck.
Again, you have to start somewhere, so basics are, drain fuel if its old, put in fresh mix, if no help, check air filter, then take carb apart and clean, be careful with the gaskets and diaphragms, if you can, get a kit and have it as backup.
Pics of it apart will help too.
I would start with a carb clean and check the main delivery fuel nozzle (where the fuel enters the venturi ) for a stuck one way valve, dont use compressed air, you can damage them.
get some small vac hose, and place it on the metering side of the fuel delivery nozzle (once apart), and check you can blow thru it, but not suck back using your mouth.
Some fresh fuel, and a bit of movement back and forward will often get them unstuck.
Again, you have to start somewhere, so basics are, drain fuel if its old, put in fresh mix, if no help, check air filter, then take carb apart and clean, be careful with the gaskets and diaphragms, if you can, get a kit and have it as backup.
Pics of it apart will help too.
Romper
ArboristSite Lurker
Sorry so long to get back. I am starting all over with your suggestions as well as a new carb. I could not get the rebuilt carb to flow. Maybe wrong gasket kit.
Thanks ahead of time I’ll let you know how it goes.
Romper
ArboristSite Lurker
Ok finally installed another Chicom carb and this one actually works with minimal tuning. The Husky is ready to go back to the owner. Thanks for your input.
Paul Bunions
ArboristSite Operative
I am a Chicom carb addict, but I am starting to think partial carb rebuilds with OEM kits are better. I got poor results with a sonic cleaner and gasoline. I got good results part of the time with CCP carbs. I just rebuilt an Echo 620P carb, and it really runs well now.
did you put gasoline in the ultrasonic cleaner? Have not heard of anyone doing that. I just use water and a few drops of dish soap - usually works very well - then install a carb kit in the cleaned carb.
Paul Bunions
ArboristSite Operative
I got the idea of using gasoline from a Youtube channel called Steve's Small Engine Saloon. You put gasoline in a sealed container and put the container in a sonic cleaner full of water. Keeps the gas sealed up.
oh yeah, I've seen Steve's channel
He's the guy who starts every session by popping Open a can of beer
He's the guy who starts every session by popping Open a can of beer
Have you ever witnessed a gas can expanding in the sun? Same thing happens in an ultrasonic cleaner, they create heat. I won’t put gas anywhere near my ultrasonic cleaner.
Right, and if you leave the container open, the US action will create vapors that could ignite.
Paul Bunions
ArboristSite Operative
Internet forum theories are amazing. Then there is reality.
Heat doesn’t cause expansion ? Pretty sure that’s not an internet theory.
Paul Bunions
ArboristSite Operative
Gas in a sealed container works perfectly, over and over. That's reality.
Check this out:
Check this out:
I don't think I would do that. A little Dawn in the water works wonders
One thing to remember about US cleaners - there are different power levels. Higher power levels cost more.
When you add items (i.e. jars of liquid), they absorb some of the power. Make sure you buy one with a power level high enough to do the job. Small inexpensive ones made primarily for jewelry are probably not strong enough to use with a container of solvent.
When you add items (i.e. jars of liquid), they absorb some of the power. Make sure you buy one with a power level high enough to do the job. Small inexpensive ones made primarily for jewelry are probably not strong enough to use with a container of solvent.
Paul Bunions
ArboristSite Operative
Long as I'm here, I will point out something people who work with trees might find interesting. A 50% solution of liquid laundry detergent will remove black residue from cutting tools that have gotten hot cutting wood. You leave them soaking overnight, and it falls right off. Oddly, I learned this from machinists.
I have no idea whether it will do anything with gas residue.
I have no idea whether it will do anything with gas residue.
Husky77
ArboristSite Operative
Hear does cause expansion, opened a jerry can that was stored in a dark shed so not in direct sunlight. Nearly blew my head off
Husky77
ArboristSite Operative
I know from experience laundy detergent can etch aluminium. I learned the hard way, so take care what your doing with it on a saw. You could be lucky and it work but your gambling and could ruin it. Good luck
For those questioning heat expansion, look up. Clouds are a thing.
Paul Bunions
ArboristSite Operative
We're going from water slowly evaporating from the soil to imaginary explosions from peanut butter jars full of gasoline in 130-degree water.
If vapor pressure worked the way it has been suggested here, cars would explode when parked in the sun.
Clouds aren't caused by expansion. They are actually caused by condensation. Water vapor is invisible. If you can see it, it's not vapor.
If vapor pressure worked the way it has been suggested here, cars would explode when parked in the sun.
Clouds aren't caused by expansion. They are actually caused by condensation. Water vapor is invisible. If you can see it, it's not vapor.
