

Outboard CDI Ignition Unit Box for Yamaha 25HP / 30HP 2-Stroke 69P-85541-09
Eliminate misfires, hard starting, and loss of power with this high-performance CDI Ignition Box Assembly. Specifically engineered for Yamaha 25HP and 30HP 2-stroke outboard engines, this premium replacement CDI unit restores instant engine starting, precise spark timing, and optimal fuel combustion under all throttle conditions.

Key Features & Highlights
- Direct OEM Plug & Play Fit: Precision-molded connectors match factory wiring harnesses directly—no cutting, splicing, or rewiring required.
- Optimized Spark Timing & Voltage: Delivers consistent, high-energy voltage to the spark plugs, improving engine responsiveness, idle stability, and overall fuel efficiency.
- 100% Sealed Marine Protection: Encapsulated in high-grade anti-vibration epoxy resin to seal out humidity, salt spray, water ingress, and engine vibration.
- Heavy-Duty Heat Dissipation: Built with temperature-resistant electronic components to prevent thermal breakdown during long running times at high RPMs.
Technical Specifications
Parameter | Specification |
OEM Reference Part Number | 69P-85541-09 / 69P-85541-00 / 69P-85541-01 / 69P-85541-02 |
Engine Compatibility | Yamaha Outboard Motors (2-Stroke) |
Engine Horsepower | 25 HP & 30 HP (E25 / E30 Series) |
Encapsulation Type | Fully Sealed Waterproof Epoxy Resin |
Condition | 100% Brand New Marine Aftermarket Replacement |
Package Includes | 1x CDI Ignition Unit Box |
Fitment & Engine Compatibility
- Yamaha 25HP / 30HP (E25B / E30H / 25B / 30B 2-Stroke)
- Compatible Outboard Brands: Parsun, Hidea, Powertec, Yamabisi 25HP/30HP 2-stroke engines based on Yamaha 69P architecture.
Troubleshooting Tip for Boat Owners
- No spark on one or more cylinders
- Engine bogs down or cuts out at higher RPMs
- Hard starting or failing to start when warm
- Intermittent ignition loss


