420666142 Sea-Doo Ignition Coil | Genuine OEM BRP Part

🔧 Product Description

Genuine Sea-Doo Rotax Stick Ignition Coil Assembly - Part Number: 420666142

A genuine BRP coil-on-plug ignition coil for Sea-Doo ACE and 4-TEC engines. It receives the engine-control trigger signal and generates the high voltage required to fire the spark plug under compression.

⚙️ Key Features

• Genuine BRP pencil/stick ignition coil
• Integrated high-voltage plug connection
• Correct electrical connector and dwell characteristics for the Rotax engine-management system
• Coil assembly is catalogued with protective cap 420201430 on selected 900 ACE applications
• One coil is used per cylinder

🚤 Compatibility

Commonly used on

• Spark, Spark Trixx and GTI 90 900 ACE models
• GTI, GTS, GTR, GTX, RXP, RXT and Wake 1503 4-TEC models
• Selected 1630 ACE/4-TEC 170, 230, 300 and 325 HP models
• Selected Sea-Doo jet boats using the 1503 4-TEC engine

Typically suits

• HP Range: Approximately 60-325 HP across supported ACE and 4-TEC engines
• Engine / Drive Type: Three-cylinder Rotax 900 ACE, 1503 4-TEC or 1630 ACE/4-TEC petrol engine
• Year Range: Approximately 2002 onward; 420666142 is principally associated with later service applications
• Serial / Model Identification: Confirm coil length, connector, protective-cap arrangement and the original 420666140/141/142 reference.

🔌 Function

Steps battery voltage up to the high ignition voltage needed to jump the spark-plug gap and ignite the compressed air-fuel mixture.

⚠️ Common Signs of Failure

• Engine misfire, rough idle or loss of power
• Hard starting or one cylinder not contributing
• Fault follows the coil when coils are exchanged between cylinders
• Cracked housing, carbon tracking or corroded connector pins
• Moisture or oil contamination in the spark-plug tube

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 420666142 → supersedes or replaces 420666141 on supported applications
• 420666141 and 420666140 - related earlier coil references

OEM / Related Numbers

• 420666142
• 420666141
• 420666140
• 420201430 - related protection cap

Aftermarket / Verified Equivalents

• Australian Jet Ski Parts: AM420666142
• Aftermarket Sea-Doo 900/1503/1630 stick-coil assemblies matching the OEM connector and length

📦 Condition

• Genuine Sea-Doo / BRP OEM part
• Brand new
• Supplied in genuine BRP or equivalent protective packaging