Sierra 18-9900 Digital Compression Tester

Sierra 18-9910 Oxygen Sensor Tester & Simulator Use Sierra 18-9910 Oxygen Sensor Tester and Simulator for testing & diagnostics on any Oxygen Sensor to determine whether the sensor needs...

Sierra 18-9801 Multimeter-DVA Tester Includes VOA meter with built-in direct voltage adapter. Tests electrical and ignition systems A must for testing Mercury ignition systems Interchangeable...

Sierra 18-3525 Thermostat Sierra replacement thermostat for Yamaha Outboards. Temperature Rating: 122°F / 50°C Fits: F115/LF115 (2005-14), Z250/LZ250 (2003-05), LZ300/Z300 (2004-06),...

Sierra 18-5907 MerCruiser Starter For GM and Ford Engines.  Replacement Solenoid: 18-5837 Features: