420431871 Sea-Doo Oil Cooler Gasket | Genuine OEM BRP Part

🔧 Product Description

Genuine Sea-Doo Rotax Oil Cooler Gasket - Part Number: 420431871

A genuine BRP formed gasket used between the oil cooler and engine lubrication housing on supported Rotax marine engines. It seals the oil and cooling interfaces disturbed during oil-cooler removal or engine-lubrication service.

⚙️ Key Features

• Genuine BRP oil-cooler sealing gasket

• Correct oil and coolant passage alignment

• Heat-, oil- and coolant-resistant material

• Single-use gasket recommended whenever the oil cooler is removed

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 420431871 → supersedes 420431870

• 420431870 → earlier oil-cooler gasket reference

OEM / Related Numbers:

• 420431871

• 420431870

Aftermarket / Verified Equivalents:

• SBT replacement oil-cooler gasket/O-ring family cross-referencing 420431870 and 420431871

• Aftermarket gasket must match the exact Rotax oil-cooler casting

🚤 Compatibility

Commonly used on:

• Spark and Spark Trixx 900 ACE model families

• GTI 90 with the 900 ACE engine

• Selected later Rotax 900 and 1630 lubrication systems whose diagram specifies 420431871

Typically suits:

• HP Range: Approximately 60-325 HP where the specified oil-cooler arrangement is used

• Engine / Drive Type: Rotax ACE/4-TEC engine lubrication and oil-cooling system

• Year Range: Approximately 2014 onward, engine revision dependent

• Serial / Model Identification: Confirm the complete model, engine type and oil-cooler diagram. Adjacent oil-system gaskets can appear similar but have different passage layouts.

🔌 Function

Seals the oil-cooler mounting joint so pressurised engine oil and cooling fluid remain inside their intended passages.

Common signs replacement or service is required:

• Engine oil or coolant seeps around the oil cooler

• Oil and coolant cross-contamination

• Gasket is hardened, torn or compressed

• Leak begins after the oil cooler has been removed

📦 Condition

• Genuine Sea-Doo / BRP OEM part

• Brand new

• Supplied in genuine BRP or equivalent protective packaging