Frequently Asked Questions About International S2100-S2300 Fuel Tank Senders

Will these fuel tank senders fit my specific International S2100 or S2300 model year?

These fuel tank senders are designed to fit International S2100 and S2300 series trucks from model years 1989 through 2010. However, compatibility can vary based on your specific tank configuration. We recommend checking your tank depth before ordering, as sender lengths typically range from 12 to 36 inches. If you're unsure about fitment, contact us with your VIN number and we can verify the correct sender for your truck.

What's the difference between mechanical and electric fuel senders, and which one do I need?

Mechanical senders use a float arm connected directly to the gauge through a cable, while electric senders use a variable resistor to send an electrical signal to your dash gauge. Most S2100 and S2300 models from 1995 onwards use electric senders with either 0-90 ohm or 240-33 ohm resistance ranges. Check your dash gauge or existing sender for ohm ratings - this information is usually stamped on the sender head or gauge back. Electric senders are more common and generally more reliable for these models.

How difficult is it to install a fuel tank sender on these trucks?

Installation typically takes 1-2 hours and requires basic hand tools. The main challenge is safely accessing the top of the fuel tank. You'll need to drain the tank below the sender level, remove the bed or access through the bed floor (some models have access panels), disconnect the old sender's wiring, and carefully remove it using a sender wrench or large channel locks. Always disconnect the battery first and work in a well-ventilated area. Having a helper makes the job easier, especially when aligning the new sender.

Why is my new fuel gauge sender giving inaccurate readings?

The most common causes of inaccurate readings are incorrect sender arm length, wrong ohm range, or improper calibration. First, verify you have the correct ohm range sender for your gauge. Second, ensure the float arm isn't hitting the tank bottom or sides - you may need to carefully bend it for proper clearance. Some aftermarket senders require calibration by bending the float arm to match empty and full positions. Also check for corroded connections or damaged wiring, as these can cause erratic readings.

What's included with these fuel tank senders and what else might I need?

Most fuel tank senders come with the sender unit, float, and mounting gasket. However, you'll typically need to purchase separately: a new lock ring (if yours is damaged), tank sender wrench, thread sealant or fuel-resistant gasket maker, and new wiring connectors if yours are corroded. Some installations may also require a new ground strap. We recommend replacing the rubber gasket even if reusing an existing lock ring to ensure a proper seal and prevent fuel vapor leaks.