# 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

  

🔄 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

  

🚤 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 replacement or service is required:

  

• 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

  

📦 Condition

  

• Genuine Sea-Doo / BRP OEM part

• Brand new

• Supplied in genuine BRP or equivalent protective packaging

## Details

- **Price:** 119.0 AUD
- **Vendor:** Seadoo
- **Tags:** Sea-Doo Parts | Jet Ski Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 119.00 AUD | In stock |

## Images

- 420666142 Sea-Doo Ignition Coil | Genuine OEM BRP Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/420666142-coil)
> Updated: 2026-08-01