1. Technical Specifications

2. Key Features & Functionality

• 3-Cylinder Sequential Firing: Calibrated for balanced 120-degree crankshaft spacing, triggering cylinders 1-2-3 with absolute precision to maintain smooth idle quality and crisp high-RPM power output.

• Solid Epoxy Potting: The internal circuit board is vacuum-encapsulated in heavy-duty structural marine epoxy resin, preventing moisture ingress, saltwater corrosion, and solder-joint fatigue caused by engine harmonics.

• Integrated Ignition Timing Curve: Features factory-profiled analog timing advance characteristics to ensure optimal combustion efficiency across changing RPM bands while preventing damaging pre-ignition.

• Plug-and-Play OEM Harness Fitment: Wire color coding, pin terminals, and bullet connectors conform strictly to factory wiring schematics for direct drop-in installation without wire cutting or splicing.

3. Compatible Models

Primarily compatible with Yamaha 3-cylinder 2-stroke mid-to-high horsepower outboards:

• Yamaha 2-Stroke 75HP Series: 75A, 75TR, 75TLR models

• Yamaha 2-Stroke 85HP Series: 85A, 85TR models

• Yamaha 2-Stroke 90HP Series: 90A, 90TR, 90TLR, 90TJR (classic 688 3-cylinder series)

• Clone Engines: Compatible with Parsun (T75 / T85 / T90), Hidea, Powertec, and other outboard brands utilizing the Yamaha 688 electrical architecture

4. Aftermarket & Brand Compatibility

• OEM Brand Fitment:

• Yamaha Marine: Engineered for genuine Yamaha 75HP to 90HP 3-cylinder electrical systems and ignition coil drive circuits.

• PREMARINE Brand Aftermarket Replacement:

• PREMARINE Quality Standard: PREMARINE specializes in high-reliability marine electronics, CDI power packs, trigger coils, and ignition hardware. This CDI unit is manufactured with automotive-grade semiconductors, heavy-duty silicon controlled rectifiers (SCR), and low-ESR capacitors.

• Direct OEM-Level Performance: Spark discharge energy, timing advance slope, low-cranking voltage trigger, and thermal cycling endurance meet or exceed OEM specifications, serving as the premier cost-effective choice for resolving dropped cylinders, heat-related shutoffs, or complete loss of spark.

5. Common Symptoms & Troubleshooting

• One Cylinder Has No Spark (Severe Power Loss and Engine Shaking):

• Cause: A blown SCR or failed internal gate channel inside the CDI corresponding to that specific cylinder.

• Troubleshooting: Swap the trigger or coil output leads between the dead cylinder and a firing cylinder; if the dead channel remains with the original CDI wire, the ignition coil is good and the CDI unit must be replaced.

• Intermittent Stalling When Hot / Won't Restart Until Cooled Down:

• Cause: Thermal breakdown of internal capacitors or soldering joints under engine bay operating temperatures.

• Troubleshooting: When the motor stalls hot, immediately test for spark across all three cylinders; if spark disappears while stator charge and pulser resistances test within spec, the CDI has suffered thermal failure.

• Complete Loss of Spark Across All Three Cylinders (No-Start Condition):

• Cause: Internal discharge capacitor shorted, or the black/white stop circuit wire is inadvertently grounded.

• Troubleshooting: Disconnect the black/white kill wire from the harness to isolate boat wiring and lanyards; if spark does not return and stator high-voltage outputs are good, replace the CDI pack.

OEM Part Numbers

Compatible OEM references include:

688-85540-00

688-85540-10

688-85540-11

688-85540-12

Compatible Engine Models

This C.D.I. Unit is primarily designed for:

2-Stroke 75/85/90HP

If you are unsure about compatibility, please provide your engine model number or identification plate for verification before ordering.

Applications

This C.D.I. Unit is commonly used for:

Outboard engine repair

Engine rebuilding projects

Marine maintenance workshops

Boat fleet maintenance

Commercial fishing vessels

Recreational boats

Marine spare parts distribution