Frequently Asked Questions About International 9900/i/ix Fuel Tank Senders

Will these fuel tank senders fit my specific International 9900 model year?

Our fuel tank senders are designed to fit International 9900, 9900i, and 9900ix models from 1987 through 2017. However, compatibility can vary based on your specific tank configuration. Most standard 100-150 gallon aluminum and steel tanks use either 5-hole or 6-hole mounting patterns. Before ordering, check your existing sender's mounting bolt pattern and measure the tank depth to ensure proper fitment. If you're unsure, contact us with your VIN and we can verify compatibility.

What's the difference between OEM and aftermarket senders, and which should I choose?

OEM senders typically feature brass floats and stainless steel components, offering superior corrosion resistance and accuracy over time. Aftermarket options use plastic floats and aluminum arms, which work well but may require replacement sooner in harsh conditions. OEM units generally last 7-10 years, while quality aftermarket senders average 4-6 years. If your truck sees heavy use or extreme weather, the OEM investment often pays for itself. For lighter duty applications, aftermarket senders provide good value.

Can I install a fuel tank sender myself, or do I need special tools?

Installation is straightforward but requires caution when working with fuel systems. You'll need basic hand tools, a brass drift punch (to avoid sparks), and ideally a sender wrench for the lock ring. The job typically takes 1-2 hours per tank. Critical steps include draining the tank below sender level, cleaning the mounting surface thoroughly, and using a new gasket with fuel-resistant sealant. Many drivers successfully complete this repair themselves, but if you're uncomfortable working around fuel, professional installation runs $150-250 per tank.

Why does my fuel gauge read incorrectly even with a new sender?

Incorrect readings often stem from mismatched ohm ranges between your sender and gauge. International 9900 series trucks typically use either 33-240 ohm or 0-90 ohm senders, depending on the year and gauge cluster. Installing the wrong ohm range sender will cause inaccurate readings. Additionally, corroded ground connections at the tank or gauge cluster frequently cause erratic readings. Before replacing a sender, verify your gauge's ohm requirements and check all ground connections with a multimeter.

How long do fuel tank senders typically last, and what causes them to fail?

Quality fuel senders generally last 5-8 years under normal conditions. Primary failure causes include sulfur corrosion from diesel fuel (especially older high-sulfur formulations), physical damage to the float from debris in the tank, and worn resistance strips causing dead spots in gauge readings. Using fuel additives with high detergent content can accelerate wear. Regular fuel filter changes and avoiding running tanks extremely low helps extend sender life by reducing debris contact with float mechanisms.