Question - What causes a snowblower to stall?

Answered by: Jonathan Smith  |  Category: General  |  Last Updated: 19-06-2022  |  Views: 966  |  Total Questions: 11

The carburetor might be clogged. A clogged carburetor is most commonly caused by leaving fuel in the snowblower for a long period of time. This sticky fuel can clog up the carburetor and cause the engine to stall. If the carburetor is clogged, try cleaning it with carburetor cleaner. Running the snow thrower with the choke on should not do any permanent damage. When the choke is on it provides the engine with more fuel than it needs. When the spark plug gets soaked it will not spark correctly and ignite the fuel. If this is the case, the spark plug will have to be replaced. Position the tip of the aerosol can into the center of the carburetor and spray directly into the running carburetor. Doing this while the carburetor is running allows the cleaner to penetrate inside and clean the carburetor's throat and remove deposits that exist in the lower throttle plate. Could have a clogged vent. possibly plugged fuel line which won't flow extar amount need when under load. The two most common problems with this carb is 1) dirty bowl nut, which has already been discussed and, 2) the little O-rings on the main jet. Here are four telltale signs that your carburetor needs attention. It just won't start. If your engine turns over or cranks, but doesn't start, it could be due to a dirty carburetor. It's running lean. An engine “runs lean” when the balance of fuel and air gets thrown off. It's running rich. It's flooded.

https://www.autoblog.com/2016/01/05/symptoms-of-a-bad-or-failing-carburetor/

Symptoms of a Bad or Failing Carburetor Reduced engine performance. One of the first symptoms commonly associated with a bad or failing carburetor is a reduced engine performance. Black smoke from exhaust. Another symptom commonly associated with a problematic carburetor is black smoke coming from the exhaust. Backfiring or overheating. Hard starting.

https://www.houzz.com/discussions/1613500/easiest-way-to-get-any-gas-engine-started-if-it-son-t-want

USE a Can Of CARB CLEANER to prime it by directly spraying it down the carb. then CHOKE it and pull the rope or remove the spark plug and spary a 2 second blast down the spark plug hole! Two stroke or four it won't hurt the engine. Some will say don't do it on two strokes but using it for priming won't hurt a thing.

https://seafoamsales.com/sea-foam-official-video-auto-carburetor-intake-cleaning-using-sea-foam-spra

Use Sea Foam Spray to safely and effectively clean residues and deposits from intake valves, chambers and compression rings! Sea Foam Spray delivers a high concentration of petroleum cleaning solvency and lubricity to carburetor throttle valves, intake runners and valves, and chamber areas.

https://gumout.com/maintenance-aerosols/carburetor-choke-cleaner/

Carburetor: Spray to both ends of the choke valve shaft while working choke by hand. Spray down and around the carburetor throat to remove deposits from the throttle plate area. Do not spray down carburetor throat with engine off. Do not spray below throttle plate.

https://motorcyclehabit.com/how-to-clean-a-motorcycle-carburetor-without-removing-it/

To clean a motorcycle carburetor without removing it, you'll need to remove the bowls at the bottom of the carburetor. Once the bowls are removed, spray some carburetor cleaner up inside, wait a few minutes, then spray again to ensure coverage. Then replace the bowls and start the motorcycle to assess how it runs.

https://www.ereplacementparts.com/repair-center/lawn-equipment/lawn-mower/only-runs-with-the-choke-o

An engine that will fire and run with the choke closed but dies when the choke is opened likely has debris at least partially blocking the fuel passages in the carburetor. In this condition the closed choke provides enough extra fuel to enter the engine to overcome the lack of fuel flowing through the other passages.

https://mechanics.stackexchange.com/questions/16549/i-accidentally-kept-my-vehicle-choke-on-while-ri

3 Answers. It will not damage the engine at all. All that will happen is that it will run richer, thus using more fuel. If you did it for thousands of miles you'd probably end up with more deposits in the engine/exhaust, but even that is easy to sort.

http://www.city-data.com/forum/automotive/517161-motor-will-only-run-choke-small-6.html

Basically it can't draw enough fuel with bad Diaphragm. If the engine only runs with the choke full on it means you have a vacuum leak and the engine runs too lean with the choke off. Some times a back fire into the carburetor will blow a pressed-in BB out of a drilled passage way.

https://support.troybilt.com/s/article/10093-1

An engine that requires the choking ( partial or full ) after initial engine warm up is an indication that the engine fuel air mixture system is out of adjustment. Both the manual choke system and the manual primer system engines may experience this similar symptom of running only when the fuel mixture is enriched.

https://www.quora.com/Is-it-bad-to-run-lawn-mowers-in-the-choke-position

If you have a choke lever separate from the throttle and the engine only stays running when choked, then your carburetor has a fuel blockage causing it to be too lean(not enough fuel). The only way to balance the fuel air mixture is to restrict the air by choking it. That's why it runs better on choke.

https://www.snowblowersatjacks.com/starting-your-snow-blower-the-ultimate-cheat-sheet.aspx

Set the Choke to FULL. FULL Choke means the choke is closed. This seals off the carburetor's air supply in order to create a richer fuel mixture needed to start a cold engine. Move the choke back to RUN once the engine warms up.