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Servicing the Fuel Tank

How is the fuel tank serviced?

Servicing The Fuel Tank

Fuel tanks are designed to keep your engine's fuel clean, vented and secure. If you spot debris in the tank or leaking gasoline, it's time for fuel tank maintenance. Never attempt to repair a damaged tank. It poses a risk of leakage, fire or fuel contamination. If you're replacing a fuel tank, use only parts recommended by the engine manufacturer. These parts will attach securely to your engine in the space provided.

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Service part numbers for the fuel tank are located in in your engine's . Engine parts list lookup typically requires the complete Model number and six character Type number. (Example: 12H702-0505-E1)

In order to view the correct Illustrated Parts List and determine the part numbers for your specific engine, you will need your engine's complete Model, Type, and Code numbers.

The numbers listed next to the part illustrations in our IPLs are called Reference Numbers. These numbers are one to four digits in length depending on the part. The Reference Number is used to locate the specific Service Part Number (usually six digits) you will require for ordering purposes.

For your convenience, engine parts (crankshafts, carburetors, pistons, gaskets, etc.) can be purchased online through the Lawn Mower Parts, Repair Parts & Maintenance Products section of our website directly from the factory. If you know your part number and wish to order factory direct, please click the "Buy Online" link provided here.

Do-It-Yourself parts and products (oil, air filters, spark plugs, carburetor cleaner, etc.) can also be ordered online through the Maintenance & Accessories section of our website.

Many fuel tanks are designed to use a vented fuel cap to prevent a vacuum from forming in the fuel line. If fuel is leaking from the cap, a properly fitted replacement cap can solve the problem.

Your tank may also contain a fuel filter (see "Servicing the Fuel Filter"). Check it occasionally for debris.

Inside The Fuel Tank
Fuel tanks must be constructed of a non corrosive material or coated with a corrosion-resistant layer to protect against the damaging effects of water, alcohol and salt. If the tank is designed to deliver fuel through a fuel line, a convex fuel filterConvex Fuel Filter
Convex Fuel Filter
may be located at the base of the tank, where fuel from the tank enters the fuel line. A filter can also be located outside the tank, midway along the fuel line.

If your tank must sustain excessive vibrations, you can install a labyrinth-equipped tank on some models. The labyrinth, available from your Authorized Dealer, contains a set of baffles and/or a foam insert to reduce the sloshing and vaporization of fuel.

Removing And Cleaning The Tank

  1. Remove the spark plug lead and secure it away from the plug.

  2. Use a fuel line clamp or other smooth-faced clamp to seal the fuel line where it attaches to the carburetor. Then, disconnect the line from the carburetor, hold the line over a bucket or fuel can and release the clamp. Dispose of all fuel in a safe manner.

  3. Check with a flashlight for debris and beads of light that indicate holes or cracks. Use a baster to remove loose debris. If you find damage, replace the tank with original manufacturer's equipment.

  4. Inspect the fuel filter (see "Servicing the Fuel Filter") for debris or deposits.

  5. Reattach the fuel tank or install a new tank, fastening it firmly with the cap screws. This is a good opportunity to replace the fuel line and filter, using original manufacturer's equipment.



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