Forum Thread

Snow Blower Lacking Power?

neteng101 1,198 316 November 11, 2012 at 06:51 AM
Wondering if anyone has some advice - either I'm going to have to get a replacement or maybe there's something I can tune to get a bit more power out of my snow blower?

http://www.mtdproducts.com/webapp...-1_1_5__3_

I have an MTD 21" single stage 123cc... it wasn't too bad the first year I remember using it, yes it wasn't that great but I seem to recall it having a bit more pushing power than it does now. It seems to die rather easily now, get stuffed, and one thing I've noticed is that I've never been able to run it properly after fully releasing the choke. So I've always had to leave a bit of choke... which doesn't seem quite right?

I can do a basic tune-up, oil and E3 spark plug, but I'm just wondering if this unit will never have enough power so I should just go for a bigger unit. Not interested in a huge 2-stage, don't have that much to clear, but maybe a bigger engine single stage. But I wonder if I could do something to get a bit more out of this unit.

Its not very old, say 3 years? And looks almost new even, just the lack of power and the inability to run properly without choke (it will stall too easily without choke, when pushing through snow).

17 Comments

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Joined Dec 2005
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#2
Are you sure the oil is full? If you are running gas with any ethanol and don't use a gas stabilizer during the off season you probably need to clean the fuel system. Try a carb or fuel injection cleaner. Also do NOT use high-octane gas in these, they run worse. You need to use the cheap, low octane gas.
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E finita la cuccagna

Liberals want you to think like them, Conservatives just want you to think!
#3
Clean/rebuild carb. Replace fuel lines. Stop leaving gas in unit
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Joined Jun 2005
Let Sleeping Dogs Lie
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#4
just bring it to a shop and have them look at it could be air filter bad spark plug gap bad fuel.
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#5
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Joined Jan 2010
Hello, My Name is Mike!
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#6
I owned one like this for years, Trust me, you'll never be able to do anything worthwhile to make it more powerful.

I finally decided my back and health was more important, and 3 years ago after a lot of research, I bought an electric start (plugs in the wall) Sears 11 hp unit on sale for $1,000.00. It has more than paid for itself over the years. It makes the little one look like a toy. There's absolutely no comparison, the Sears wins hands down.

Now, I'm not saying you need one that large, BUT, if you buy anything less then 9-10hp, it's going to be YOU that will have to have the muscles to push it around, instead of the blower doing the work.
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#7
Add something called Stabil to the gas. Makes starting mine easier in the cold, and I'm convinced it runs better.

Don't mess with the carb if you're not familiar with it.

Betcha that red fluid stuff will fix the ails. It should run as good now as it did the first year.

If you replace it, check the integrity reports of the Chineese engines. You may not want one.

Post here for help from the experts: http://www.abbysguide.com/ope/discussions/


I bought an expensive one with pin drive axles.... hated it every time I used it for 4 years. Was a bear to turn with my bad back. Bit the bullet and bought an incredibly expensive one with a true differential. No snow last year, but..... Be good to yourself.
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Last edited by Brattles November 11, 2012 at 02:02 PM
Joined Dec 2007
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#8
Unit was drained dry last season and I always use Stabil anyways the moment I buy gas home. Been doing all that for years. I suspect its the carb that needs adjustment, spark plug gap looked fine and changed it anyways... it sputters a little even with no load without any choke. I think the carb needs adjustment just not so sure on what to do with it.

No one here seems to know much about carbs and what's on this unit?

I think I found the carb, its this one...

http://www.robertskartshop.com/p/...-1225.html
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#9
did you drain the carb also? there prob isn't a way to adjust the carb not that you would want to anyway. unless it is an adjustable carb and you screwed with it before, there is something restricting the fuel. rebuild carb. I would recommend replacing fuel hose incase the ethanol started to break down the rubber from the inside which would clog the jets.
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#10
Yup - drained the carb too - but I didn't do that one year and had to the next before it would start. I think that's why I drained the carb dry too last season. Haven't tried to see if there's an idle adjust on it... I just want it to run without stalling so easily - pushing it is not the problem, if it can keep doing its thing. But the needing choke issue was there since day 1 - now that I think of it I probably should have done something while it was still under warranty.
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#11
Ok I thought it just started. take a picture of the side of carb. let's see if it adjustable. adjusting idle won't do anything. you need to turn the high speed screw a little out and maybe the low speed.
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#12
Hmm - was reading online more and my problem might be a lot simpler. I think I tighten the gas cap too tight on it, and thus make the venting not work properly. Manual says to clean gas cap vent, but there's no hole, so its probably venting via the threads. Will try it out later today without the super tight gas cap, but will have to wait for the next snowfall to really see if it works.
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#13
+1 for cleaning the carb. You can't leave gas in these machines to sit over months; this craps up the carb. The fact that you have to leave the choke on tells me that the carb isn't functioning properly, and that will surely impact performance.
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#14
Looks like that carb you linked to is $25 new several places and easier to replace than fix. Or even better, find out if a better quality one can be substiuted.

Can you post the model of the engine?
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#15
I took the carb out and apart a little, looks about new inside actually. Put it all back together and running some fuel system cleaner as well through it. Doesn't seem to be an idle adjust on it either.

Seems to run better now, but will have to see how it performs with snow the next go around.
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