How Do I Know If My Lawn Mower Fuel Pump is Bad?

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Is your lawn mower fuel pump going bad? Here are eight signs to look out for:

  • Dead engine
  • Fuel tank noise
  • Sputtering engine
  • Difficult starts
  • Power Loss
  • The Actual Stall
  • Lower Fuel Efficiency
  • Surging Power

Where is the Fuel Pump on a Briggs and Stratton Engine?


The fuel pump on a Briggs and Stratton engine is situated in one of these places:

  • On the Carburetor
  • Near the fuel tank
  • On the engine.

Should a Lawn Mower Fuel Filter be Full?


Yes, the fuel filter of your mowing machine should be full. Inadequate fuel in the filter might hamper its performance and it is bad for the health of your mower. 

If the filter is not full of fuel, it shows that there is a problem.  Furthermore, clogged fuel filters can also result in engine ignition problems.

Why is My Riding Lawn Mower Not Getting Gas?


This problem might arise as a result of a loose, disconnected or dirty spark plug.

Ensure that you check, clean off debris, re-connect and tighten it. In addition, clean or replace dirty air filters.

If fuel does not reach the engine of your mower, tap the side of the carburetor to help with the flow of fuel. If this tip does not work, you need to get a new fuel filter.

What to Do If Your Lawn Mower Won’t Start?

If your lawn mower isn’t starting, make sure that you get a fresh tank of gas. Check if the carburetor is getting sufficient air.

Also, a damaged air filter can allow contaminants to damage or clog the engine. To solve this, check the air filter to confirm if it is the cause of the problem.

Some Reasons Why Lawn Mowers Will Not Start

There are several reasons why your lawn mower might not start. 

Here are some of them:

  • Clogged fuel filter
  • Stale gas leads to clogged carburetor
  • Bad starter solenoid
  • Dead battery
  • Dirty Air Filter
  • Dirty or disconnected spark plug.

How to Know If a Fuel Pump is Bad on a John Deere Lawn Tractor

Here are some steps to know if the fuel pump of your John Deere tractor is bad:

Step 1

Drive your John Deere tractor onto flat ground.

Step 2

Pour the fuel into the mower’s tank if there isn’t any in the tank.

Step 3

Slide a pan beneath the tractor’s engine.

Step 4

Pop the hood open. Locate the rubber-made fuel line which is on the side of the engine. Inspect it into the carburetor. Unplug the pins and wiring on the line.

Step 5

Put an alligator chip on the (+) area of your battery. You can now connect the other clip to other areas where the wires are connected to the fuel line.

Step 6

Connect the other alligator clip from the (-) part of the battery to the other wire connection on the fuel line.

Step 7

Drain the fuel in the pan and check the fuel that is coming out of the line. 

If the fuel is pumping in a fast way, it is working properly but if it is just trickling out, you might need to replace the fuel pump.

How Do You Change a Fuel Pump on a John Deere Lawn Tractor?

  • Park your machine on level ground and set the parking brake. Ensure that you turn the ignition key to the off position.
  • Open the tractor’s hood and find the fuel pump. The fuel pump is on the left side of the engine, below the engine shroud.
  • Remove the two 3/8-bolts that hold the fuel pump to the engine block and slide the fuel pump off.