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2026 Mercury / MerCruiser G3 engine diagnostics
DIACOM® Marine version 3.5 supports:
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■  plus many other troubleshooting and productivity features...
■  ECM reflash capability for factory authorized marine dealers
■  Print hardcopy reports and Export data to other PC programs
■  Record live EFI data to capture elusive intermittent events
■  Read / Clear system fault codes, exercise ECM outputs & run tests
■  View EFI system data to monitor engine performance
DIACOM® Marine Features
■  Perpetual software license,  no subscription required.
The Diacom® PC based marine diagnostic system gives you the power and flexibility you need to troubleshoot today’s advanced  EFI systems.

DIACOM® Marine unlocks the computing power of your Windows based notebook or netbook PC and provides state-of the-art features to pinpoint EFI system problems quickly and accurately.

In addition to supporting sterndrive and inboard marine engines, DIACOM® supports Mercury's outboard engine lineup.
 
DIACOM® Marine for Windows 11, 10, 8, and 7
Diacom Marine PC Based Diagnostic System