Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

These are the sounds issued forth from my beloved Tecumseh engines equipped with fixed Jets. I don't own one but my friend does on a machine I recomended and he constantly rags me about it. In an effort to get him off my back I have researched the following and these are the results:

1) The replacement carb for a medium frame Tecumseh is 632334A ( this is a part # that replaces a disontinued part but the blow up diagram of the replacement shows an adjustable main jet. Therefore I ASSUME it is adjustable.

2) The carburetor repair kit for this model is 632347 

I was able to secure a blowup diagram of this carb and the list of parts in the repair kit. It APPEARS all of the main jet parts are present in the kit.I NEED VERIFICATION If this includes the needle and the jet. 

If one were to remove the fixed jet from the current carb which I believe is the green plastic tube held in by O-rings and replace it with the adjustable jet and needle from the #632347 repair kit would it work? Could you retrofit the new bowl with the adjustable assembly or would you have to buy a new bowl?

If anybody could verify or correct my assumptions I would be most appreciative.

Marc

Just for the record -theHonda GX series engine on my power washer made the same spit, sputter,cough,blemph sounds due to it's fixed jet carb. Honda has addressed this problem by producing a line of altitude related jets. Another words if you want to richen up a Honda fixed jet carb parts are available. The carb will still be fixed jet but at a richer setting.

mml4 wrote:

I can't be sure it'll work that way.  My new carb has this same tube, only it appeared to be brass in color rather than a plastic tube sticking up into the throat of the carb.  As for my original fixed jet carb, I never opened the bowl on it, so I can't say.  If you find it is necessary to answer your question, I'll open it up for you and check it.  As for your friends Tecumseh making all these noises and sputters, I hope this is a new snowblower because if it isn't, I'd have him do a full rebuild on it and make sure he removes the welch plug inside the carb and confirm those holes (I believe 3 of them) are fully cleared and clean.  That welch plug area is something that tends to get missed by someone not fully qualified to rebuild them and is usually the primary reason the engine won't idle if blocked up.

Richie wrote:
"Emulsion:  a suspension of small globules of one liquid in a second liquid with which the frst will not mix" - for example oil in vinegar.

The use of the word is technically incorrect in referring to a gasoline carburetor. In the emulsion tube the fuel droplets mix with air to make a frothy blend that atomizes better in the intake tract.

BTW, I just searched dictionary.com for "emulsion tube" and it asked me if I really meant "demolition derby"......

John

JohnEDavies wrote:
"Emulsion:  a suspension of small globules of one liquid in a second liquid with which the frst will not mix" - for example oil in vinegar.

The use of the word is technically incorrect in referring to a gasoline carburetor. In the emulsion tube the fuel droplets mix with air to make a frothy blend that atomizes better in the intake tract.

BTW, I just searched dictionary.com for "emulsion tube" and it asked me if I really meant "demolition derby"......

John




I'm just glad to hear you used a dictionary, I was almost worried about you.

Have seen it spelled "emolition"

Exactly the reason I said emulsion with the ???.  I've read some trouble shooting on carbs, and this tube is sometimes referred to as "emulsion tube"   For whatever reason, none of my parts views even show this component.  In any event, this is why I mentioned to Marc that the carburetor may not function correctly if removed.   How do I refer to this component? Believe it or not, before I posted the first response to Marc, I too checked the dictionary  The reason for the "????"

"BTW, I just searched dictionary.com for "emulsion tube" and it asked me if I really meant "demolition derby".

Jonn, that did give me a laugh

mml4 wrote:

Marc, the reason I originally checked the dictionary was because I saw it spelled like, "Emolltion"  Even my dictionary said, I need to learn how to spell.  So I used the spelling in the dictionary as, Emulsion.  Again, we need a Smiley showing him scratching his little head

Too funny, now everyone is off checking their exploded carburetor views and going through every dictionary they have. 

Main Entry: emul·sion
Pronunciation: i-'m&l-sh&n
Function: noun
Etymology: New Latin emulsion-, emulsio, from Latin emulgEre to milk out, from e- + mulgEre to milk; akin to Old English melcan to milk, Greek amelgein
1 a : a system (as fat in milk) consisting of a liquid dispersed with or without an emulsifier in an immiscible liquid usually in droplets of larger than colloidal size b : the state of such a system
2 : SUSPENSION 2b(3); especially : a suspension of a sensitive silver salt or a mixture of silver halides in a viscous medium (as a gelatin solution) forming a coating on photographic plates, film, or paper

n.

1.

The act of softening or relaxing; relaxation.

Source mw.com

What this has to do with a carb, I have no idea.

Richie-

 Friends machine is new last season and runs great. Just suffers from the "fixed jet blues".

My point on the green tube is that I believe it takes the place of the adjustable jet . It's that part that you refer to as the brass tube going into the carb throat. It's the picture that Marty posts from time to time telling folks to clean the two holes with the bread wire. I may be wrong in calling it the adjustable jet but I have heard it referrd to as that in conversations with others. My hope is you pull the green tube and either refit the existing new style bowl with the the adjustable assembly  or purchase a bowl that will accept the adjustable assembly and that this will work.

If the adjustable mates up with the hole that the green tube was removed from I think you would have to leave the o-ring in the hole to prevent an air leak. The one thing that will tell if this scheme will work is to know if the green tube and the adjustable tube are the same length. Being that the bowls are the same depth and the carb housings are the same  there is a shot this will work.  

Are you sure the green tube is called an emolition tube.? I thought the emolition tube was the tube cast into the Tec. carb body that couldn't be removed. I remember it as the part you couldn't see but could hear rattling if you shook the carb next to your ear.

Marc

I thought Marty was talking about the bowl nut?