5 Snapper Self-Propelled Lawn Mower Problems and Simple Solutions!

There are a lot of Snapper mowers out there, and a lot of happy homeowners who use them to keep their lawns looking great. Occasionally, your Snapper mower may encounter issues that prohibit it from running efficiently.

Mower won’t start, shaking/vibrating, unable to engage mower blades, weak transmission, and unable to drive straight are the most often encountered problems.

Continue reading this article to learn more about Snapper self-propelled lawn mower problems and the simple solution that can be applied.

Snapper Self-Propelled Lawn Mower Problem

What Are the Problems Usually Occur with The Snapper Self-Propelled Lawn Mower?

Snapper mowers are plagued with numerous problems. Plenty of people have run across them and complained about them.

The most frequent issues with Snapper self-propelled mowers, as well as their potential causes and solutions, are summarized in the following table:

ProblemsPossible CausesSolution
Won’t StartBad or old fuelDrain the fuel tank and fill it with fresh fuel
Dirty carburetorClean and replace if needed.
Plugged air and fuel filterRemove and clean them, replace if needed
Shaking Or VibratingLoose or missing engine mounting boltsSecure engine bolts and replace any missing bolts
Clutch is badReplace the clutch
Unbalanced or damaged mower bladesReplace any damaged blades and make sure they are balanced.
Mower Blades Won’t EngageWorn Deck BeltReplace a belt that is worn, cracked, or shiny in appearance.
Belt Coming Off of the PulleysReplace worn or damaged deck parts.
Bad PTO SwitchReplace bad PTO switch
Weak Transmission SystemBad drive beltReplace worn belt
Bad tensioner pulley     Replace the pulley
old hydraulic oilChange your hydraulic oil (recommended by Snapper).
Smoke coming outClogged air filterClean and replace if needed
Engine oil is lowTake it to a Repair shop

1. Mower Won’t Start

Mower Won’t Start

When the engine isn’t getting the proper amount of fuel, air, or spark, the Snapper lawn mower won’t start.

There could be old or bad gas in the float bowl of the carburetor. Certain components evaporate, leaving a thicker, stickier material. Sticky fuel can clog fuel lines, filters, and carburetors, preventing the engine from starting.

The Fix

Get rid of the old gas. Use fresh fuel (octane rating 87 and ethanol not more than 10%). Replace the fuel and flush the tank. For cleaner fuel and fuel system, use a fuel stabilizer.

Dirty Carburetor

When grime and dirt get stuck in the mower’s carburetor, it’s tough to start.

The Fix

Clean the Carburetor and, if necessary, replace it.

Clogged Air and Fuel Filter

Dirt might clog the air/fuel filter. If the engine’s air intake or fuel delivery systems are clogged by dirt and debris, performance will suffer.


Replace clogged fuel filters. Install the filter with the arrow facing fuel flow.

Air filters should be cleaned and replaced when necessary.

2. Shaking or Vibrating

Excessive shaking and vibration are common in Snapper mower.  There are several reasons of vibrations:

Loose or missing engine mounting bolts

Engine mounting bolts, mitigate engine vibration. Replace old, broken, or missing engine mounting bolts.


Replace any missing, worn, or broken, mounting bolts.

Clutch is Bad

Damage to your lawn mowers clutch might lead to noticeable shaking.


Inspect engagement linkages and bushings for wear.

Unbalanced or damaged mower blades

mower blade that isn’t properly balanced may wobble as it spins. This will cause a noticeable shake when moving at high speeds.


Check blade balance with a blade balancer. Before you begin, ensure sure your blade is balanced.

3. Mower Blades Won’t Engage

Mower Blades Won’t Engage

When the deck belt on a Snapper mower is worn or broken, the PTO switch is broken, or the clutch has failed, the mower blades may not engage.

1. Worn Deck Belt

As the belt wears, it loses its ability to grasp the pulleys and so turn the blades.


Belts that are broken, cracked, or overly glossy should be removed and replaced.

2. Belt Coming Off of the Pulleys  

Loss of belt tension could occur if the idler arm and spring become worn. The belt could be loose and stretched out. The belt may come off if the pulleys are not parallel to the deck.


Modify the broken or worn deck pieces. If the deck belt is strained, replace it. Make sure the belt goes around the pulleys in the right direction.

3. Bad PTO Switch

The blades won’t start when the PTO switch prevents power from reaching the clutch.


Replace faulty PTO switch.

4. Weak Transmission System

Bad hydraulic belts or pulleys might weaken Snapper mower hydrostatic transmissions. Old hydraulic oil or low oil levels can also cause it.

Bad drive belt

The inefficiency of your pump can be caused by a broken drive belt.


Belts that are cracked, frayed, or worn should be replaced.

Bad tensioner pulley    

For the drive belt to remain taut, the tensioner pulley must function properly.


Grease the tensioner arm and replace the pulley

Old hydraulic oil

If hydraulic oil is low or old, it won’t lubricate the system properly, and your hydraulics will feel feeble.


In order to keep your Snapper in tip-top shape, make sure to change the hydraulic oil at the intervals specified by the manufacturer.

Hydraulic oil levels should be checked regularly.

5. Smoke Coming Out

If your Snapper lawn mower is smoking, it could be caused by oil burning off a hot component, like the muffler or the engine cylinder. Excessive fuel-to-air ratios during combustion can also lead to this issue.

Plugged air filter

It’s possible to block airflow due to a lack of cleaning because of dirt and grass stuck in the air filter.


Take apart the filter so it may be cleaned. If the filter is worn out, you need to get a new one.

Engine oil level is low

Without enough oil, your engine’s friction increases, and the temperature rises quickly.


You can add fresh oil to the engine. Always keep the oil level in the recommended level. Take it to a local engine repair shop so they can look it over.

Frequently Asked Questions (FAQs)

What company manufactures Snapper lawnmowers?

Briggs & Stratton.

How long do self-propelled mowers typically last?

Eight years.

Why is it so difficult to start my Snapper lawn mower?

The fuel in the carburetor’s float bowl could be old or contaminated.

Which country manufactures Snapper lawnmowers?

Product of the USA, specifically Milwaukee, WI and Sherrill, NY.

Is the Snapper brand a good one?

High-end home lawn mowers, including push mowers, riding mowers, and tractors, come from Snapper. They’re ranked among the best of their kind.

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