Marine engines are complex systems and special care must be taken to make sure that they are in peak performance condition and do not let you down at crucial times. However, how do you make this happen? There is no magic wand, all that you have to do is to get our Jaltest marine scan tool and nip any potential issues or malfunction of your marine engine in the bud so that they do not become major problems and leave you stranded at sea.
Before going in-depth into the various aspects of our marine engine scanner, it is important to understand the types of marine engines as the functioning of the maintenance tool largely depends on it. You can diagnose faults both for inboard engines and outboard engines with our marine diagnostic scan tool and get the best results from both scenarios.

Inboard engines are typically installed in very large boats and yachts inside the hull of the vessel. When a diagnostic tool is used for fault analysis, it connects to the engine via a cable. On the other hand, outboard engines are mounted externally on the transom and connect to an outboard scan tool wirelessly via Bluetooth.
The benefit of having our marine diagnostic scan tool is that one software is good for both inboard and outboard marine engines.
While this post will deal with marine engines in general, the focus will be primarily on the Jaltest outboard diagnostic scanner.
Cutting-edge Features Of The Jaltest Outboard Motor Scan Tool
When you invest in the Jaltest outboard motor scanner, you get a comprehensive package that consists of the outboard motor scan tool and software along with a laptop, adapter, and cables, as well as technical support. With the software, you can run commands that replicate what you get from dealer-level service engineers and carry out the same tests such as injector tests, fuel pump tests, and many more.
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Read and clear fault codes
Marine outboard engines have onboard computers that display malfunctions in the form of fault codes. These codes are in an alpha-numeric format and each represents a specific issue with the engine. However, fault codes are not standardized and vary between makes of outboard marine engines.

Also known as Diagnostic Trouble Codes (DTCs), these codes are used to identify and diagnose issues with the marine engine’s systems. These codes can be accessed with the Jaltest outboard scan tool and valuable information is gathered for troubleshooting and repairs.
Let us now go through some samples of marine engine fault codes.
P Codes: These are general codes used by many marine outboard engine manufacturers and indicate a wide range of issues.
- P0123: Throttle Position Sensor Circuit
- P0300: Engine Misfire
- P20E8: Reductant Pressure Too Low
SPN (Suspected Parameter Number) and FMI (Failure Mode Indicator): The next level after P Codes is SPN which manufacturers use to provide more specific information about the fault.
- SPN 5842: SCR Monitoring System Malfunction.
- SPN 1791: EGR Valve Control Circuit.

Other examples of fault codes as identified by our marine scan tool.
- 137: Pre Filter Oil Pressure Sensor Circuit Failed High.
- 141: Engine Oil Pressure Sensor Circuit - shorted low.
- 143: Engine Oil Pressure Low – Warning.
- 146: Engine Coolant Temperature High – Warning.
- 147: Accelerator Pedal Position Sensor Circuit - low frequency.
Now that we have a definite understanding of fault codes for marine engines, let us explore the process of clearing them.
Whenever a malfunction arises, it will be displayed on the Jaltest outboard motor scan tool once you connect it to the outboard engine. Now, the tool will prompt you to enter the manufacturer and model of the engine. The software will identify the specific malfunction and guide you on how to take corrective action. What helps is the detailed wiring diagrams that provide the exact position of the fault for analysis and correction.
The software also gives live technical information about the state of the engine in real-time. The advantage here is that you get an updated form of the fault, allowing you to easily troubleshoot the issue.

It is always wise to maintain your outboard marine engine by changing filters and fluids to prevent future problems. Additionally, check carefully for any signs of rust on metal components as they can lead to electrical problems. Before starting a full-scale fault rectification procedure through our marine scan tool, do a preliminary inspection and check for loose wires or something similar.
Calibration and parameter settings
Almost all top-of-the-line marine engines have factory settings of vital systems and components that optimize their performance. These settings consider only standard operating conditions. However, it is not necessary that these must be followed only as key components can be calibrated and system parameters set to meet challenging operating scenarios. The Jaltest outboard scan tool calibrates and sets parameters that optimize so that your boat performs precisely as you want.
You are thus in total control of the outboard engine and even the smallest facet can be set to match the required working conditions. Further, to ensure that your calibration and parameter settings cannot be tampered with access to them strictly controlled by a series of master passwords.

There are several tasks that can be carried out with the Jaltest marine diagnostic scan tool. You can adjust the trim, set up key parameters, adjust idle speeds for fuel efficiency, and use code injectors to quickly increase performance. Through these activities, you are not only avoiding fault codes but also making sure that your boat is perpetually in peak performance mode.
Among the advanced features of the Jaltest software for calibration and parameter settings are the following:
- Cutting-edge parameter settings to keep the engines running
- Calibrate digital throttles for instant responsive power
- Calibrate trim for smoother running and handling
- Set engine location for perfectly balanced operation
- Optimized for ghost trolling motor calibration
- Maintenance resets and parameter monitoring
You can also carry out actuation of components such as injectors tests, fuel pump operation, cylinder cut-out tests, and all other tasks required to diagnose and troubleshoot outboard marine engines.
Deep Coverage Through Jaltest Marine Scan Tool
The Jaltest marine engine scanner offers deep coverage of marine engines making sure that they are always on the job and do not let you down at critical moments. While our software caters to both gasoline and diesel engines, it is the latter software that is more in demand.

Several systems are taken care of by our outboard marine engine software including the electronic modules, engines, helm, powertrain, steering, and more. Technically advanced activities include calibrating trim and control levers, carrying out cylinder cut-out tests, and setting parameters. All testing data is recorded by the software at a very fast 90 minutes for 24 measurements.
Preventive Maintenance and Fault Correction with Jaltest Outboard Scan Tool
Our marine diagnostic scan tool has a very intuitive and user-friendly dashboard that has two very critical features. One is the scan “all” feature and the other is the “scan by symptoms” option. Let us analyze each of them as standalone entities.
In the first instance, you carry out full system scans of all components and systems at pre-determined intervals. Any minor malfunction is immediately identified and quick corrective action can be taken to keep the engine running without the fear of it becoming a major problem. This is preventive maintenance that is crucial to the proper upkeep of your outboard motor.

When you select “all”, you run checks on the various metrics selected by you from the menu. Among the parameters that you can select are the engine, electronic module, instrument cluster, powertrain, steering, and more. Once the system is fully scanned, you can be confident of trouble-free performance from your outboard marine motor.
The other case is “scan by symptoms” where you select a system or component per the problem and work on it to set it right. Here, the Jaltest outboard motor scanner reads the fault code and guides you on the action to be taken to clear the fault code. The uniqueness of our software is that in case any component malfunctions, our software will inform you if it has to be replaced or repaired and in case of replacement, how to do so.
Preventive maintenance with the Jaltest outboard diagnostic scanner is as critical a part of the trouble-free running of your engine as identifying faults and clearing them.
Summing Up
The Jaltest outboard scan tool offers deep coverage of marine outboard engines from top manufacturers, from Volvo Penta to Indmar, to Yamaha, and more. You get advanced troubleshooting solutions that rectify any fault codes irrespective of the seriousness of the issue.
What sets our software apart from the others in this niche is the ease with which it can be set up. Unlike several software catering to fault diagnosis of marine outboard engines, the Jaltest maintenance tool is simple to set up. There is no elaborate configuration process, all that you have to do is download the software on the laptop provided, connect to the outboard engine wirelessly and you are ready for fault clearing activities.
Finally, we provide three updates to the Jaltest marine diagnostic scan tool every year. This ensures that our software remains updated to deal with any technological innovations made to outboard engines produced by leading manufacturers around the world.
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