Marine Engine Diagnostics

Understanding Marine Engine Diagnostics

Marine engine diagnostics entail a comprehensive examination of an engine’s internal computer system. This process involves connecting the engine’s Electronic Control Module (ECM) to a computer equipped with diagnostic software, utilizing a specific engine-specific adapter. The primary objective of marine engine diagnostics is to provide invaluable insights into the engine’s history, particularly when contemplating the purchase of a new or used boat. Through a diagnostic scan, a marine surveyor can validate crucial details such as the engine’s RPM run history, actual engine hours, and other essential information that offers a clearer perspective on the engine’s prior usage. This diagnostic process uncovers both historical and recent fault codes.

To benefit our clients in making informed decisions about boat purchases, we offer diagnostics that furnish vital information about an engine’s history. Additionally, our advanced engine diagnostic software can record an engine’s performance during a sea trial, primarily applicable to inboard-powered boats. This assists the surveyor in confirming gauge accuracy and obtaining more precise data regarding the vessel’s overall performance during sea trials. Engine diagnostics are available as an optional service for gasoline inboard and most outboard engines equipped with ECMs.

Outboard Engine Diagnostics

Sun Coast Marine Surveying extends engine diagnostic assessments to all outboard engines, including jet skis. We establish a connection between your engine’s ECM and our robust diagnostic software using an adapter tailored to your specific engine. This enables our marine surveyors to verify critical information such as RPM run history, engine hours, fault codes, and, in some cases, servicing history. This information proves invaluable when deciding which boat or jet ski to purchase. It’s essential to note that this service is available as an optional add-on when conducting a marine survey.

Diacom supports a wide range of engine types, including MerCruiser, Mercury Outboards, Volvo Penta, Indmar, Pleasurecraft Marine, Crusader, Ilmor, Marine Power, Kodiak, Flagship Marine, GM RamJet Engines, and more. Diacom’s PC-based diagnostic tool provides the flexibility and robustness needed to troubleshoot modern EFI systems accurately and swiftly. It distinguishes itself as one of the few diagnostic tools offering comprehensive support for a wide array of engines, all within a single diagnostic tool. Leveraging the capabilities of a standard Windows-based notebook, Diacom aids in pinpointing EFI system issues efficiently.

Harnessing the Power of the Internet


Diacom recognizes the Internet’s transformative capacity in reshaping task execution. It simplifies the sharing of data with external parties and can convert engine data into formats that are compatible with software such as Access and Microsoft Excel.



Capturing the Potential of Big Screens

In the realm of modern laptops, today’s models sport larger, high-resolution screens, a feature that Diacom leverages to offer a comprehensive view of engine performance. This not only enhances the comprehension of EFI values but also reduces the need for excessive clicks. Moreover, Diacom provides the flexibility of customizing data display to suit the user’s preferences, including options like side-by-side twin engine displays, expanded parameter windows, instant pop-up graphs, report printing, and robust data recording capabilities.

Effortless Access to Service Information

Diacom simplifies access to service information by seamlessly integrating digital data from engine manufacturers. Users can easily retrieve service information by simply clicking on the relevant fault codes displayed on the Diacom screen.

Tailored Tests for Specific EFI Systems

Recognizing the diversity of EFI systems within the marine sector, Diacom automatically adjusts to the specific EFI system under scrutiny, streamlining tasks by displaying and conducting system-specific tests. This adaptability is made possible through the utilization of Windows ActiveX programming technology.

Specialized Functions for Factory-Authorized Dealerships

Diacom collaborates with marine engine manufacturers to integrate specialized EFI system functions. This collaboration empowers factory-authorized dealerships to conduct memory updates and system upgrades with speed and efficiency, potentially reducing the necessity for ECM exchanges.

For Additional Details

To access a complete list of features and information regarding Diacom Marine and other Rinda Technologies products, kindly visit our website at If you require assistance, our product specialists in the USA and Canada are available at 773-736-6633.

Diacom Kit Configurations

  • 94010 – Diacom Marine: Includes Diacom CD, USB cable, #94005 MEFI, and #94006 PCM-555 adapters.
  • 94030 – Diacom Marine + CAN: Includes Diacom CD, USB cable, #94005 MEFI, #94006 PCM-555, and 94029 CAN network adapters.

System Requirements

To use Diacom, you’ll need:

  • A notebook or netbook PC with a 1 GHz or higher processor.
  • Microsoft Windows 7, Windows Vista, Windows XP (both 32-bit and 64-bit versions of Win 7 / Vista are supported).
  • A minimum of 512 MB of RAM.
  • A minimum of 150 MB of available hard disk space.
  • A CD-ROM drive.
  • A USB port.
  • An SVGA (800 x 600) or higher resolution display screen.
  • A mouse, touchpad, or compatible pointing device.

Additional items or services may be required for certain features:

  • An internet connection for email and web-related features.
  • Document viewing utilities like Adobe Acrobat and Microsoft Internet Explorer to access electronic service information.
  • Usage authorization and data files provided by engine manufacturers for Diacom special functions.

Please be aware that all specifications are subject to potential changes without prior notice, and there may be variations in product versions. While we strive to provide accurate information, it’s essential to note that Rinda Technologies, Inc. cannot accept responsibility for any errors, omissions, or consequences that may result from the use of this information.