2-Stroke Setup and Connection
Locate Diagnostic Connector:
Find the 4-pin or 2-pin diagnostic connector near the engine’s Electronic Control Module (ECM).
Refer to your engine’s service manual for the exact location.
Prepare the Engine:
Ensure the ignition is OFF.
Attach the appropriate adapter (e.g., Buckshot Racing DDT-111, DDT-113, DDT-228, or DDT306).
Connect the TechMate Pro DTT from Buckshot Racing #77 (upgraded replacement for the Mercury Outboard Digital Diagnostic Tool (DDT):
Plug the scan tool’s communication cable into the diagnostic connector.
Turn the ignition key to the "ON" position (do not start the engine).
Access the Mercury Menu:
Navigate to the Mercury Outboards menu using the ▲ and ▼ keys.
Select your engine type and press YES.
Diagnostics and Functions
Retrieve Fault Codes:
Select ECM Faults to view active or stored fault codes.
Use the scan tool’s display for descriptions of detected issues.
Clear Fault Codes:
After resolving issues, select Erase Faults to clear fault codes.
Live Data Monitoring:
Choose Data Monitor to view real-time engine parameters such as:
RPM
Temperature
Oil pressure
Fuel system status
Perform Output Tests:
Access Output Tests to verify:
Ignition coils
Fuel pump operation
Warning horns
Reset System Values:
Select Reset BLM (Block Learn Memory) if specified in the service manual. This restores factory fuel delivery settings.
Maintenance Tips
Perform diagnostics routinely to detect issues early.
Always disconnect the TechMate Pro DTT from Buckshot Racing #77 Mercury Outboard Digital Diagnostic Tool (DDT) before starting the engine.
Store the tool in a protective case to avoid damage.
4-Stroke Setup and Connection
Locate Diagnostic Connector:
Identify the 4-pin CAN diagnostic connector, typically near the ECM.
Use the appropriate adapter (e.g., Buckshot Racing #DDT-470).
Prepare the Engine:
Turn the ignition OFF.
Connect the TechMate Pro DTT from Buckshot Racing #77 Mercury Outboard Digital Diagnostic Tool (DDT)’s cable to the diagnostic connector.
Power On:
Turn the ignition key to the "ON" position.
Select Mercury Outboards from the main menu.
Diagnostics and Functions
Read Fault Codes:
Navigate to ECM Faults to read active, pending, or historical fault codes.
Use fault descriptions to identify and address issues.
Erase Fault Codes:
Resolve any faults, then use Erase Faults to clear them from the system.
Monitor Live Data:
Access Main Data Monitor for real-time values, including:
Engine RPM
Coolant temperature
Throttle position
Fuel system status
Perform Functional Tests:
Use Output Tests for component diagnostics:
Test fuel injectors, ignition coils, and warning systems.
System Resets:
Perform resets such as Fuel Adaptation when replacing key components or after major repairs.
Maintenance Tips
Use the Live Data feature to monitor engine health regularly.
Always follow safety precautions, such as working in well-ventilated areas.
Avoid exposing the TechMate Pro DTT from Buckshot Racing #77 (Mercury Outboard Digital Diagnostic Tool - DDT) to water or extreme temperatures.
These instructions ensure effective diagnostics and maintenance for Mercury 2-Stroke and 4-Stroke outboards using the TechMate Pro DTT from Buckshot Racing #77.
Complete instruction books for the TechMate Pro DTT from Buckshot Racing #77 that replaces the Mercury Outboard DDT (Digital Diagnostic Tool) are included with our kits. Our replacement Mercury Outboard Digital Diagnostic Tool (DDT) is arguably the best Mercury Outboard Digital Diagnostic Tool, at a fraction of the cost of used Mercury OEM Tool.
Our tool replaces the Mercury Marine and Quicksilver Digital Diagnostic Tool (DDT) is identified by the part number 91-823686A2. This tool interfaces with various engine systems through specific software cartridges and adapter harnesses, each designated by unique part numbers.
Software Cartridges:
Outboard DDT Software Cartridge:
Part Number: 91-822608 5
Applications:
1986 and newer EFI Outboards with Electronic Control Modules (ECM) for 2.4/2.5/3.0 Litre engines, including Hi-Performance 2.0/2.4/2.5 Litre models.
1994 and newer 3.0 Litre Carbureted Outboards.
1997 and newer DFI/OptiMax Outboards.
1998 and newer Mercury/Mariner 25-40 hp 4-Stroke engines.
Note: Includes Technical Reference Manual 90-825159--3.
MerCruiser DDT Software Cartridge:
Part Number: 91-803999
Applications:
1993 and newer EFI MerCruiser Engines.
1997 and newer Thunderbolt V (RPM History).
Note: Includes Technical Reference Manual 90-806932--3.
Adapter Harnesses:
1994 3.0 Litre Carbureted Outboards:
Part Number: 84-822560A 1
1993 and newer Gasoline Stern Drive and Inboard EFI Engines:
Part Number: 84-822560A 2
1994-1/2 and newer 2.5 Litre EFI Outboards (with 824003 ECM only):
Part Number: 84-822560A 5
Includes:
1994-1/2 Pro Max/Super Magnum 150/200/225 hp
1997 and newer DFI/OptiMax Outboards
1995 and newer 3.0 Liter EFI and Carbureted Outboards:
Adapter Harness (Signal Conditioner):
Part Number: 84-822560A 6
Adapter Harness:
Part Number: 84-822560A 7
All Hi-Performance 2.0 Liter/2.5 Liter EFI Outboards (with 11350A ECM only):
Part Number: 84-822560A 8
Note: Use with 84-822560A 7
25-40 hp 4-Cycle Outboards:
Part Number: 84-822560A10
Note: Use with 84-822560A 7
Extension Harness, 2-pin 15 ft (4.57 m) long:
Part Number: 84-822560T11
Note: Use with 84-822560A 5
2000 Digital OptiMax Outboards only:
'T' Harness:
Part Number: 84-875232T 1
Function: Allows the DDT to be connected under the dash at the 5-pin tachometer harness outlet.
Injector Test Harnesses:
1986 and newer 2.4 Liter/2.5 Liter/3.0 Liter EFI Outboards:
Part Number: 84-830043A 1
Note: Use with 84-822560A 7
1982 and newer Hi-Performance 2.0 Liter/2.4 Litre/2.5 Litre/3.4 Litre EFI Outboards:
Part Number: 84-830043A 2
Note: Use with 84-830043A 1
Please note that the availability of these parts may vary, as the DDT and its accessories have been discontinued and are no longer sold by Mercury Marine.
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