partszen Carburetor Leak Detector Gauge Kit for Walbro & Zama — 0–20 psi with Metering Lever Adjustment Tool

partszen Carburetor Leak Detector is a handheld gauge kit that checks two-stroke carburetor sealing and includes a metering-lever adjustment tool compatible with Walbro, Zama and Tillotson parts.

This compact diagnostic set gives you a practical way to confirm whether a small-engine carburetor is leaking and to fine-tune the metering lever. The kit replaces common service components (ZAMA ZPG-2 and Tillotson 243-504) and works across several Walbro and Zama models, offering a 0–20 psi (0–138 kPa) measurement range for everyday workshop and field checks.

How does the gauge detect a carburetor leak?

The instrument measures pressure or vacuum around the carburetor body to reveal sealing faults, diaphragm damage, or loose fittings. By applying a controlled pressure and watching for a change on the dial, you can quickly see whether the carburetor holds pressure as it should.

• Measurement range: 0–138 kPa (0–20 psi) for clear readings
• Analog gauge shows pressure drop when seals leak
• Portable design suitable for bench or field tests

Which carburetor models and parts does this kit replace or fit?

The partszen kit is designed to be a direct aftermarket substitute for widely used service parts, so it fits common two-stroke carburetor types. It specifically replaces ZAMA ZPG-2 and Tillotson 243-504 test tools and is compatible with Walbro 57-21 and Stens 705-020 style housings.

• Replacement for ZAMA ZPG-2 and Tillotson 243-504
• Compatible with Walbro 57-21 series and Stens 705-020
• Includes metering lever adjustment tool that replaces Walbro & Zama ZT-1 500-13

How do I use the metering lever adjustment tool included in the set?

The metering lever tool lets you position and fine-tune the lever that controls fuel flow in the carburetor. After isolating the carburetor and securing it for service, use the adjustment tool to set the lever travel and clearance to manufacturer-recommended specs, then verify with the gauge.

• Tool fits Walbro and Zama metering levers (ZT-1 500-13 replacement)
• Use after leak test to correct fuel metering alignment
• Handheld design for quick workshop adjustments

What readings should I expect and what do they mean?

A stable reading within the 0–20 psi range indicates the carburetor is holding pressure; a falling or unstable dial points to leaks or damaged diaphragms. Use the gauge to compare against service limits or to confirm repairs after replacing gaskets, diaphragms, or needle valves.

• Stable pressure indicates sealed surfaces and intact diaphragms
• Pressure drop signals leaks, cracks, or loose fittings
• Gauge sensitivity suitable for small-engine troubleshooting

Who this is for: This partszen diagnostic kit is intended for mechanics, small-engine technicians, lawn and garden equipment shops, and DIYers who service chainsaws, trimmers, blowers, and other two-stroke equipment. If you perform routine carburetor troubleshooting or need a reliable replacement for ZAMA and Tillotson test tools, this kit provides a compact, field-ready option to locate leaks and set metering levers without specialized bench machinery.