Frequently Asked Questions About Ford F600-F700 Truck Fuel Tank Senders

What years and models are these fuel tank senders compatible with?

Our fuel tank senders are designed to fit Ford F600 and F700 trucks from 1980 through 1998. They work with both single and dual tank configurations. However, compatibility can vary based on your specific tank size (19, 25, or 35 gallons) and whether you have a diesel or gas engine. We recommend checking your existing sender's part number or contacting us with your VIN to ensure proper fitment.

How difficult is it to install a fuel tank sender, and what tools do I need?

Installation typically takes 1-2 hours and requires intermediate mechanical skills. You'll need a brass drift punch and hammer for the lock ring, a multimeter for testing connections, and basic hand tools. The most challenging part is safely dropping the fuel tank if it's mounted under the truck. Many customers report that having a second person helps significantly. Always disconnect the battery first and work in a well-ventilated area away from ignition sources.

Why does my fuel gauge read incorrectly after installing a new sender?

Incorrect readings usually stem from three issues: mismatched ohm ratings between the sender and gauge (Ford typically uses 73-10 ohm senders), improper float arm adjustment, or poor ground connections. Before installation, verify your gauge's ohm requirements match the sender specifications. The float arm may need bending to match your tank depth, and ensure all ground connections are clean and tight. Some aftermarket gauges require different ohm ranges, so double-check compatibility.

What's the difference between OEM and aftermarket fuel tank senders?

OEM Ford senders typically last longer but cost significantly more. Our aftermarket options use similar float and rheostat designs but may have different mounting configurations. The main differences are in the materials used for the float (foam vs. brass) and the sending unit housing (plastic vs. metal). Most customers find aftermarket units work reliably for 5-7 years with proper installation, while OEM units can last 10-15 years.

Can I test my fuel tank sender before removing the tank?

Yes, you can perform basic diagnostics without tank removal. Disconnect the sender wire at the tank and use a multimeter to check resistance. With the tank full, you should read approximately 10 ohms, and with it empty, around 73 ohms for most Ford applications. If readings are erratic or show open/short circuits, the sender needs replacement. Also check for corroded connections at the sender plug, which can cause false readings.