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Old 02-27-2008, 09:21 AM   #1
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Ariens 5HP dies under load


I bought a used blower from a local shop and they acknowledged that it was dying under load and they were going to rebuild it before they dropped it off.

Now it's been a few months, but we haven't had any snow, so I hadn't had a chance to test it out until the other day. I put fuel in it when I got it, but I DID NOT put any Stabil in. Is 2 months of untreated fuel sitting in there enough to gunk up the carb? I do not have any reason to believe the shop wouldn't have done what they told me.

Now when I went to run it, it could run at WOT in 1/2 or 3/4 choke, but when I put it into 0 choke, it died.

I tried adjusting #19 here and that would let me run it at full throttle without the choke but still died under load. It is spitting out a lot of black smoke and the plug is completely sooted up. I don't know anything about carbs. Could anyone offer me some easy suggestions

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Old 02-27-2008, 09:33 AM   #2
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Ariens 5HP dies under load


Does the unit have a muffler at the exhaust? If so, run it for a few minutes with the muffler removed. You may have a backpressure problem at low speed caused by a partially clogged or bad muffler. Also, is there an air filter on-board the blower? Check to see if it's dirty, damaged or clogged. Black fume and soot are indications of too rich a mixture, i.e. not enough air to match the amount of fuel coming in. While it may be something more serious within the engine itself, it pays to start out with the simplest things that are not time-sonsuming, expensive or invasive. Sort of like seeing if the TV set is plugged in or if the circuit blew before calling the repair technician.

Last edited by End Grain; 02-27-2008 at 11:00 AM.
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Old 02-29-2008, 12:48 PM   #3
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Ariens 5HP dies under load


I took off the muffler, it's fine. I tried to take the carb off and the studs are rotating with the nuts, but not coming out?!
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Old 03-17-2008, 09:51 PM   #4
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Ariens 5HP dies under load


Sounds like you probably have some gunk in the carb or bad fuel.
If you can get the carb off simply spray the heck out of it with carb or brake cleaner,you should be able to separate the bowl from the body of the carb.
Make sure there isn't any gunk in the little holes and shake the float to make sure it doesn't have any fuel in it.
Sometime's over time the float will absorb fuel or come in through a crack which won't allow it to float so it will be constantly flooding the bowl.
Also look in the needle seat for the bowl and make sure no gunk has got in there.

I'm not great with small engines,hope that helps.
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Old 03-18-2008, 06:21 AM   #5
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Ariens 5HP dies under load


Thanks.

Here's what I think. I bought it used and the shop told me they were going to rebuild the carb first. At first I thought it was maybe my fault for leaving fuel in the carb for a month or two but I am not sure that was going to cause all the problems. I went to try to take the carb off myself and the studs in the block are twisting when I turn the nut, yet still not coming out, so I am guessing they never cleaned it and there's all kinds of gunk in there.

Also the throttle cable had gotten "out" of its housing so I believe it was not going to full RPM. I replaced the fuel hose which was leaking. Then I put tons of carb cleaner into the intake and adjusted the carb, fixed the throttle cable and I'll just wait until next year. I really need to get on top of emptying and running dry my small gas motors. I am a diesel guy and this is my first house so I never had these things before. [dummy]

So it snowed like 3 times this year and all 3 times I had a useless snowblower. What a waste.

Last edited by pcampbell; 03-18-2008 at 06:51 AM.
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Old 10-07-2008, 07:09 PM   #6
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Ariens 5HP dies under load


Can anyone tell me how to adjust the carb? It is a Tecumseh with 3 different screws. 1 underneath the bowl. One right above the bowl and one a little higher. I really don't remember what any of these do. I think bottom is high speed, one is low speed and other mixture??
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Old 10-10-2008, 01:04 PM   #7
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Ariens 5HP dies under load


Although I don't know why a snowblower would have one, Ive seen stranger things, so here goes. When you inspected the muffler, did it have a spark arrestor screen in it at the exhaust outlet? If it does and the screen becomes blocked with carbon the engine will act up as you describe and eventually won't run at all. Just a thought.
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Old 10-10-2008, 02:09 PM   #8
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Ariens 5HP dies under load


I took the bowl off, and cleaned it off.

I also took off the bolt that holds the bowl on, which the high speed screw screws into. I cleaned the gunk off the high speed screw, as well as there is a tiny pin sized hole in the bolt that holds on the bowl, that was gunked up. Unfortunately I really do not have any way to test it on a load, but it starts on 2 pulls,idles and revs up great now.
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