Fuel System Leak Test
It is crucial to perform a fuel system leak test before the startup of a home standby generator and after any service work is done on the fuel system, i.e. sediment trap cleaning.
Generator owners should reference these articles before performing a fuel system leak test.
Maintenance Schedule
Performing a fuel system leak test is listed as part of a home standby generator's maintenance schedule in the owner's manual. How Do I Find a Copy of My Home Standby Generator Owner's Manual, Spec Sheets, or Installation Manual?
Maintenance Safety
Owners should reference What Safety Precautions Should I Take When Performing Maintenance on My Generator? before maintenance is performed to ensure the maintenance is performed safely.
Authorized Service Dealers
While owners may perform maintenance tasks, Generac recommends consulting with your local certified service dealer (IASD). See the How Can I Find a Generac Service Dealer in My Area? article for more information.
Environment
Air-cooled Guardian Series Generators 10-26 kW (2017 to present).
When should a fuel system leak test be performed?
All Products are factory-tested before shipping to verify the performance and integrity of the fuel system. However, it is important to perform a final fuel system leak test before the startup of a home standby generator. Generac strongly recommends this inspection be performed by a certified service dealer (IASD) or authorized professional. See the How Can I Find a Generac Service Dealer in My Area? for more information.
Additionally, it is best practice to perform a fuel system leak test during normally scheduled maintenance. See the Where Can I Find the Maintenance Schedule for My Generac Home Standby Generator? article for more information.
Performing a fuel system leak test
Inspection for leaks should be done from every connection point from the generator to the supply source.


Inspect the fuel system by spraying all connection points with a non-corrosive gas leak detection fluid. The solution should not be blown away or form bubbles.
The test will identify possible leaks at all connection points (A).
See also