Troubleshooting A GPI Fuel Pump That Is Leaking

Fuel leaks are a problem. Here's how you can fix them on your GPI Fuel Transfer Pump.


Don't let your pump be a leaker. Here's what you can do to rid your pump of leakages.
  • Locate the leak and make sure all threaded parts and bolts are properly tightened
  • Inspect hoses, o-rings, and shaft seals for wear or damage. Need to replace a shaft seal? Use the links below to find our walkthroughs
  • Make sure proper thread sealant is being used

G20 Series
Replace motor shaft seal



Offerings covered by this post:

GPI EZ-8 12V Fuel Transfer Pump, 3/4″ Manual Nozzle & 10′ Hose (8 GPM) – EZ-8 (Direct Mount)
GPI G20 12V Fuel Transfer Pump Only (20 GPM) – G20-012PO
GPI G20 12V Fuel Transfer Pump, 1″ Manual Nozzle, 14′ Hose & Spin Collar Mount (20 GPM) – G20-012MD
GPI G20 12V Fuel Transfer Pump, 1″ Auto Nozzle, 14′ Hose & Spin Collar Mount (20 GPM) – G20-012AD
GPI M-150 12V Fuel Transfer Pump Only (15 GPM) – M150S-E-PO
GPI M-150 12V Fuel Transfer Pump, 3/4″ Manual Nozzle & 10′ Hose (15 GPM) – M-150S-EM
GPI M-150 12V Fuel Transfer Pump w/12″ hose, 3/4″ Manual Nozzle & Spin Collar Mount (15 GPM) – M-150S-MU
GPI M-150 12V Fuel Transfer Pump, 3/4″ Auto Nozzle, 12′ Hose & Spin Collar Mount (15 GPM) – M-150S-AU
GPI 115V M-1115S-AU Fuel Transfer Pump, 3/4″ Manual Nozzle & Spin Collar Mount (12 GPM) – M-1115S-MU
GPI 115V M-1115S-AU Fuel Transfer Pump, 3/4″ Auto Nozzle & Spin Collar Mount (12 GPM) – M-1115S-AU
GPI V25 12V Fuel Transfer Pump Only (25 GPM) – V25-012PO
GPI V25 12V Fuel Transfer Pump, 1″ Manual Nozzle, 18′ Hose & Tank Adapter Mount (25 GPM) – V25-012MD
GPI V25 12V Fuel Transfer Pump, 1″ Auto Nozzle, 18′ Hose & Tank Adapter Mount (25 GPM) – V25-012AD
GPI PRO20 115V Fuel Transfer Pump, 1″ Manual Nozzle, 18′ Hose & Tank Adapter Mount (20 GPM) – PRO20-115MD
GPI PRO20 115V Fuel Transfer Pump w/QM Meter (20 GPM) – PRO20-115PO/QM40G8N
GPI PRO20 115V Fuel Transfer Pump w/QM Meter, 18′ Hose & 1″ Auto Nozzle (20 GPM) – PRO20-115AD/QM40G8N
GPI PRO20 115V Fuel Transfer Pump, 1″ Auto Nozzle, 18′ Hose & Tank Adapter Mount (20 GPM) – PRO20-115AD
GPI 115V/230V PRO35-115AD Fuel Transfer Pump, 1″ Auto Nozzle & 18′ Hose (35 GPM) – PRO35-115AD
GPI 115V/230V PRO35-115 & QM40 Combo, No Nozzle (35 GPM) – PRO35-115PO/QM40G8N
GPI 115V/230V PRO35-115 & QM40 Combo w/1″ Automatic Nozzle (35 GPM) – PRO35-115AD/QM40G8N