Tecumseh carb help - Snowblower Forum : Snow Blower Forums
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post #1 of 36 Old 12-18-2014, 06:13 PM Thread Starter
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Tecumseh carb help

Hi guys. I have an older ariens snowblower with a tecumseh carb. I bought this kit:

http://www.ebay.com/itm/141483704268

Anyways, carb kit is in and the sb starts. I have to prime and choke every time. At full throttle 3500rpms, if you engage the auger, it bogs and dies. If you operate the choke back and forth, it and engage the auger you can get it to keep running. Eventually it dies.

It runs fine with no auger. It idles ok but tries to die if you throttle it up.


I've played with both screws and can't get it figured out.

Ideas?
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post #2 of 36 Old 12-18-2014, 06:30 PM
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Quote:
Originally Posted by TOTHEMAX View Post
Hi guys. I have an older ariens snowblower with a tecumseh carb. I bought this kit:

Carb Kit for Tecumseh Jiffy Ice Auger Model 30 and 31 Kit | eBay

Anyways, carb kit is in and the sb starts. I have to prime and choke every time. At full throttle 3500rpms, if you engage the auger, it bogs and dies. If you operate the choke back and forth, it and engage the auger you can get it to keep running. Eventually it dies.

It runs fine with no auger. It idles ok but tries to die if you throttle it up.


I've played with both screws and can't get it figured out.

Ideas?
1.5 turns out should get you in the ballpark. If it stalls when you engage the auger it is probably lean. Make sure you have good fuel flow to the carb. make sure the float is working correctly and check for vaccume leaks.
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post #3 of 36 Old 12-18-2014, 06:31 PM
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Sounds like a lean condition. Why did you rebuild the carb in the first place? Reason I'm asking is there may be other issues. Are you sure there's no air leak, maybe around the intake gasket? Float level too high, not allowing the needle valve to open all the way? Did you clean ALL the holes out in the mixture screw?
Another thing. You can buy a new carb for about 20 bucks. Just installed one of them on a hm80 and it runs fine. Just did put it on a few days ago.

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post #4 of 36 Old 12-18-2014, 06:48 PM
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You may have an issue with auger bearings, bent impeller shaft, etc. that is causing an abnormal load. Generally an engine will not stall engaging the auger if it is running at wide open throttle. With the engine off and the spark plug cable off, reach inside the chute and turn the impeller by hand. It should turn freely as should the impeller. If you feel it binding, you have a mechanical issue. MH

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post #5 of 36 Old 12-18-2014, 07:13 PM Thread Starter
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Thanks guys. Carb was super gummed up and wouldnt start.

New fuel line and spark plug.

I put the card in a ultrasonic cleaner for days and ran it multiple time. All screws were removed and it was completely apart.

I'll check the main auger to see if it's free.
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post #6 of 36 Old 12-19-2014, 10:42 AM Thread Starter
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The auger moves but it is stiff. I will take it apart today and see what is binding it up.

The carb leaked fuel out of it overnight. frustrating as its got a new kit in it.....

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post #7 of 36 Old 12-19-2014, 10:46 AM Thread Starter
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Quote:
Originally Posted by micah68kj View Post
Sounds like a lean condition. Why did you rebuild the carb in the first place? Reason I'm asking is there may be other issues. Are you sure there's no air leak, maybe around the intake gasket? Float level too high, not allowing the needle valve to open all the way? Did you clean ALL the holes out in the mixture screw?
Another thing. You can buy a new carb for about 20 bucks. Just installed one of them on a hm80 and it runs fine. Just did put it on a few days ago.
Link to the carb you bought?

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post #8 of 36 Old 12-19-2014, 10:49 AM
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Quote:
Originally Posted by TOTHEMAX View Post
The carb leaked fuel out of it overnight. frustrating as its got a new kit in it.....
Assuming it's a float type carb, you're at the needlevalve area. If the seal isn't good or installed incorrectly or the float is at the wrong height that can happen.
There can also be crap behind the welch plugs that can mess it up when the engine is running.

Just some thoughts.

PS I like to add a gasline shutoff valve on my machines. Prevents that accidental leakage from happening.
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post #9 of 36 Old 12-19-2014, 01:14 PM Thread Starter
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There is no float. It's a diaphragm style carb. Can i convert it?
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post #10 of 36 Old 12-19-2014, 02:47 PM
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Could you post the numbers off your engine so we know what your working with? This is a single stage snow blower? What model?

Toro 8/24 (38080) 1989
Toro 721-QZR (38743) 2015 (Hemi Predator Power)

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