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Again, doing battle with Tec HH120 w/Walbro LME


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#16 JDBrian OFFLINE  

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Posted January 20, 2012 - 12:14 PM

Congratulations. Carbs still seem to be one of the biggest mysteries out there for many of us. This thread will be valuable for anyone having that symptom in the future.

#17 JDBrian OFFLINE  

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Posted January 20, 2012 - 12:16 PM

Thought of that too Kenny, but with the luck I have with these Walbro carbs, that isn't going to happen.
I've done all the carbs on my Kohlers, and every time, I rebuild one, set it as per specs, and presto, they work.
But these Walbro things just don't like me. I doubt it has the needle in it I might need anyways. I think it's a
newer style, judging by the choke plate design. The one that's giving me grief, I don't think has ever been apart. It had
original 1968 paint on the bowl gasket.

The one thing that puzzles me, is that the needle I took out of it, is the same length as the new one. Was there an older float design
that had longer arms for the pin?


Will, in the Tecumseh small engine manual there is a good description of all the different types of carbs. There might be enough info there to answer your question.

#18 DH1 ONLINE  

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Posted January 20, 2012 - 05:15 PM

The one thing that puzzles me, is that the needle I took out of it, is the same length as the new one. Was there an older float design
that had longer arms for the pin?


The needle might be the same but the seat could be different???

There are 2 kits for the LME carbs, what the difference is I don't know.

When you think about how a carb works it's the engines vacuum, the high speed air that flows though the carb that sucks the fuel into the engine. If the float is a little low, then the amount of fuel that gets sucked in will be less.
I think you demonstrated to everyone, to me for sure, what can happen when the float level is a little low.
Learn something new everyday, and glad you got it fixed cause my next suggestion was going to be Mr. Sledgehammer.

Edited by DH1, January 20, 2012 - 08:39 PM.
spelling


#19 JDBrian OFFLINE  

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Posted January 20, 2012 - 05:29 PM

Good point Doug. I'm going to be way more picky when I set those up in the future. I have a bit of occasional surging in the K321 on my 314. When I did the carb I thought the float was close enough and didn't adjust it. I'll have to revisit that to make sure it's right on spec.

#20 MH81 ONLINE  

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Posted January 20, 2012 - 05:30 PM

...cause my next suggestion was going to be Mr. Sledgehammer...


:rofl2:

Will, glad you got it. Hopefully that's last time you ever have to see the inside of that carb.

#21 Michiganmobileman OFFLINE  

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Posted January 20, 2012 - 08:30 PM

Glad to see you got your problem cured, I dont have that kind of engine or carb but gathered a few little tidbits of general carb knowledge for future reference:thumbs:Educational thread, THANKS to all.
Like WildBill said isnt great the amount of info and help thats available here:worshippy1:

#22 IamSherwood OFFLINE  

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Posted January 20, 2012 - 09:14 PM

Learn something new everyday, and glad you got it fixed cause my next suggestion was going to be Mr. Sledgehammer.


Doug, remember we went through this last March, with the "Evil Carb".
I wasn't about to give in again, which makes me think that one should go back on
the operating table.

#23 DH1 ONLINE  

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Posted January 20, 2012 - 09:18 PM

Doug, remember we went through this last March, with the "Evil Carb".
I wasn't about to give in again, which makes me think that one should go back on
the operating table.


Ya I remember, maybe it's the float setting on that one too???

If you ever need a demonstration on the proper technique on using a SLEDGE HAMMER on an LME carb just let me know.:bigrofl:
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#24 IamSherwood OFFLINE  

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Posted January 20, 2012 - 09:37 PM

Yes Doug, that's what I'm starting to think too. (about that evil carb)

Anyway, I'm glad it's fixed, and I gotta say, that without you guys here, giving advice, or being a sounding board, my GT life would
be very frustrating at times. People that aren't part of this site, don't know what they're missing.
Thanks

#25 DH1 ONLINE  

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Posted January 20, 2012 - 09:43 PM

That's why I like this place.
Today I help you.
Tomorrow you help me.
Everybody wins.

#26 IamSherwood OFFLINE  

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Posted January 26, 2012 - 08:58 AM

Just a note here, that I'm finally getting around to posting.

Before the final tear apart of the carb, and the grinding of the float needle head, I took a real accurate measurement
of where that float was sitting.
Rather than the 1/8" it should have been, it was at 13/64". That 5/64" made all the difference, and caued the symptoms in the video.

That's not much. Just demonstrates how fussy one has to be when setting these things.
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#27 MH81 ONLINE  

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Posted January 26, 2012 - 12:29 PM

Now to fix the evil carb...

#28 IamSherwood OFFLINE  

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Posted January 27, 2012 - 07:48 AM

Now to fix the evil carb...


Yes, I will give it shot, next time I HAVE to get into one of these things again.




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