fits make: Yamaha.

( Manufacturer Part Number: 6H4-21 ), ( Part Type: Ignition Hp )
The 6h4-85540-20-00 Ignition Pack and its equivalent, the 6h4-85540-21-00 CDI, are essential components for your Yamaha outboard engine. These ignition systems, specifically designed for 40 to 50 HP 6h4-21 engines, are engineered to deliver reliable and efficient performance.
The 6h4-85540-20-00 Ignition Pack is a traditional spark ignition system, while the 6h4-85540-21-00 CDI is a Capacitive Discharge Ignition system. Both systems share a common goal: to ignite the fuel-air mixture in the engine's cylinders at precisely the right moment, ensuring optimal combustion and engine efficiency.
The 6h4-85540-20-00 Ignition Pack includes a high-quality ignition coil, spark plug, and ignition leads. The ignition coil transforms the battery's low voltage into the high voltage required to create a spark at the spark plug tip. The spark plug, in turn, creates an electric spark that ignites the fuel-air mixture in the combustion chamber. The ignition leads connect the ignition coil and spark plug, ensuring a reliable and consistent spark.
The 6h4-85540-21-00 CDI, on the other hand, uses a capacitor to create the high voltage needed for ignition. This system is known for its reliability and longevity, as the capacitor can withstand high voltages without degrading over time. The CDI system also includes a spark plug and ignition leads.
Both the Ignition Pack and CDI are designed to provide consistent performance, even in challenging marine conditions. They are built to withstand saltwater, moisture, and UV radiation, ensuring that your outboard engine continues to perform optimally, even after long periods of use.
In conclusion, whether you choose the 6h4-85540-20-00 Ignition Pack or the 6h4-85540-21-00 CDI, you are investing in a high-quality ignition system that is specifically designed for your Yamaha 40 to 50 HP 6h4-21 engine. These ignition systems are essential for reliable engine performance, fuel efficiency, and longevity.
Pros of buying a 6h4-85540-20-00 ignition pack for Yamaha 6h4-21:1. Compatibility: This ignition pack is specifically designed for the Yamaha 6h4-21 model, ensuring a perfect fit and optimal performance.
2. Reliability: Yamaha is a well-known brand known for its high-quality products, and this ignition pack is no exception. It's likely to be durable and long-lasting.
3. Easy installation: The ignition pack is relatively easy to install, saving you time and effort compared to more complex repairs.
4. Cost-effective: In the long run, buying an original ignition pack can be more cost-effective than repeatedly repairing or replacing cheaper aftermarket parts that may not last as long.
Cons of buying a 6h4-85540-20-00 ignition pack for Yamaha 6h4-21:1. Price: Original Yamaha parts can be more expensive than aftermarket alternatives.
2. Availability: Depending on your location, finding this specific part in stock may be challenging, causing a delay in repair or replacement.
Recommendation:If you value the reliability and longevity of original parts and are willing to pay a premium for that assurance, then the 6h4-85540-20-00 ignition pack is a worthwhile investment. However, if cost is a major concern, you may want to consider aftermarket alternatives or waiting for a sale on the original part. Always ensure that any replacement part you choose is compatible with your specific Yamaha 6h4-21 model to avoid any issues during installation or operation.
Off 1988 Yamaha with power head issues, tested spark perfectly.