Don't wait too long to rebuild that expensive motor - BUT dont' do it to soon either.

This easy-to-use tester checks ring seals, valves, even head gaskets.

• Much more accurate than traditional testers - Reads critical leakdown to .5% (1/2 of 1%)
• Gauges have back lights for easy readability and low battery indicators
• 14 mm or 12 mm spark plug connector and hose included (choose size above)
• Control inlet valve avoids shock to gauges when air is turned on, allowing more accurate readings, easier use and longer gauge life
• Rugged design features rubber bumpers to protect gauges
• Hard case included.