Buying a Used Yamaha EX: Diagnostic Check Before You Buy

The EX is a popular entry and often available used, not rarely from rental. Before buying, M-JET DIAGNOSTIC shows the control unit's memory.

What you check

• Fault memory with stored entries on temperature and throttle valve
• Hours in total and per RPM range
• Live values at idle, especially temperatures and voltage
• Briefly activate coils, injectors and pump

Why temperature entries matter

Among the most frequent problems of the EX in forums are overheat warnings. If you find such entries in the memory, ask what happened and what was repaired. A craft with many hours in the low range and a clean memory is a good sign but does not replace a test ride. Also check impeller and inlet for damage.

Related topics

• Yamaha EX, EX Sport and EX Deluxe Fault Codes: List
• Yamaha EX: Engine Warning Lit, but No Code to Be Found
• Checking a Used Yamaha WaveRunner: Diagnostics Before You Buy
• Diagnostics and fault codes for your Yamaha model
• All Yamaha WaveRunner diagnostics topics

Everything runs via app over Bluetooth, for Yamaha WaveRunners from model year 2002 to today. Learn more about the M-JET DIAGNOSTIC for Yamaha WaveRunner.