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Power loss issue when plowing deep snow

857 views 16 replies 9 participants last post by  Hugo  
#1 ·
We've just had our first big snow storm of the season, and it's far from over. Instead of waiting for it to be completely over, I started plowing along the house and in my backyard.

I had been going at it for an hour when I ran into a first-to-me power loss issue : when attacking a decent-size snow bank (say, ½ to ¾ bucket height), the engine loses power and almost stalls, and it throws snow like 7-8 feet away. It's almost like it's idling at slow speed.

I then tried on some lesser quantities (7-8 inches of snow, not particularly heavy) and the same thing happened, to a lesser degree.

It was fine one minute and did that the next. No idea why. It only happens when the auger is «attacking» snow. There is a short but steep slope in my yard and the snowblower climbs it with ease, without skipping a beat. So it's only losing power when a load is put on the engine from actual plowing, not moving forward or back.

There is no snow accumulation in the impeller, the shear pins are fine, and the rest of the machine is tip-top.

Could it be the auger belt? Wouldn't it slip and the engine rpm remain the same, instead of almost stalling? If it is, I assume there is some adjustment possible?

I'm a little worried, as the worst of the snow is yet to come.

Ariens ST928LE Professional, BTW.
 
#3 ·
Yes, fuel starvation when it gets heavy load the governor opens the throttle more and the carb can’t keep up due to clogging. Often the pilot jet clogs completely first and the other carb circuits are likewise restricted. Many folks will close the choke partially to maintain some usable power. These issues tend to come on slowly over time and get ignored or bandaided until things stop completely.o_O
 
#6 ·
I'm not mechanically-savvy when it comes to carbs either, and don't have an ultrasonic cleaner.
Bring it to your local small engine shop.

It's ok to support local businesses and should never be discouraged.
 
#7 ·
Bring it to your local small engine shop.

It's ok to support local businesses and should never be discouraged.
For that I'd need a trailer, and a local shop that I actually trust. I have neither. Even if I did, the downtime would suck big time. Winter has been late to arrive, but it's here now. Guess I'll have to ride it out and find a way to bring it to a reputable shop (if such a thing exists here) this spring. In the meantime, I might get lucky and find an opportunity to try and clean it.

I will study the links in your signature before all else. Many thanks!
 
#9 ·
c


you can buy a carb online and still clean out the original one.. if nothing else than for the experience


cleaning out the carburator is a fairly easy job.. get a can of carburator cleaner, remove the heater box, take pics of the linkage on the carburator ( even the other ends of those linkages i case they fall off ) remove carburator, study an exploded view very well untill it looks so easy, open it up (not in your house itl stink of gas.. use the shed... i know.. its COLD :( ) , spray carb cleaner in all the passages untill the goop comes out clear... its totally normal to feel like your way over your head on your first carburator service.. for myself anywyas but im sure the majority if not all of us on here felt the same ;) reassemble.. put it all back together refering to your pics for reference.. putting the linkage in the wrong holes could very well cause other issues ( run away engine RPMs comes to mind, ask me how i know ;) ) and hopefully.. youll be back up and running in no time ( 1-2 hours maybe your first try?? )

and Hugo.. welcome aboard the funny ship that is snowblowerforums :D and serioulsy bud.. weve 'all' felt totally in over out heads at some point or another.. still do sometimes ;) now we all say " carb cleaning' like its the easiest thing in the world that you can do blindfolded using only your pinky toes.. but thats just because our first attempt.. was a 3-4 repeat till we got everything right ( was that just me??) now i take a carb appart every so often.. just for a quick cleaning to prevent issues during the fallowing winter ;) and soon.. yull feel just the same.. that it aint no thang ;)
 
#12 ·
During previous winters plowing the same amount of snow, would the machine handle it without noticeable bogging ?
Does the engine sound like it is running at full speed (3500 -3600RPM) without a load on it?
Are you in a slow speed setting when tackling the deep snow?
In the mean time, take 1/2 bucket width passes, until you get the issue sorted out.
 
#14 ·
1- During previous winters plowing the same amount of snow, would the machine handle it without noticeable bogging ?
2- Does the engine sound like it is running at full speed (3500 -3600RPM) without a load on it?
3- Are you in a slow speed setting when tackling the deep snow?
4- In the mean time, take 1/2 bucket width passes, until you get the issue sorted out.
1- It handled everything fine until 2 minutes before it didn't. That thing is a beast.
2- Yes. I'd even say it almost sounds like it ran faster.
3- Engine speed, no. Full throttle. Wheel speed = 1.
4- No choice. Even that is almost too much.
 
#13 ·
Not specifically mentioned yet is an easy way to test to verify it's fuel starvation. Engage just a little bit of choke and try some deep stuff again. If it doesn't bog, it's carb cleaning time. While you have the tin off to get at the carb, check for free movement of the governor linkage. My 28 was bogging due to a mouse nest interfering with that linkage.

-dan
 
#15 ·
oh my lol yes absolutely yes try this first.. sorry i didnt clue into that suggestion Hugo ( see what i was saying about were not gods??) lol