420850502 Sea-Doo O-Ring | Genuine OEM BRP Part

🔧 Product Description

Genuine Sea-Doo Oil Filter Housing O-Ring - Part Number: 420850502

A genuine BRP oil-filter housing O-ring used on numerous 1503 and 1630 Rotax 4-TEC lubrication systems. It seals the inner filter-housing or cover interface around the replaceable oil-filter element.

⚙️ Key Features

• Genuine BRP engine-oil sealing O-ring

• Correct size and elastomer for the 4-TEC filter housing

• Resistant to hot synthetic engine oil and pressure cycling

• Recommended replacement whenever the housing joint is opened

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 420850502 → supersedes 420850500

• 420850500 → earlier filter-housing O-ring reference

OEM / Related Numbers:

• 420850502

• 420850500

• 420230923 - related outer filter-cover O-ring

• 420950860 - related filter sealing ring on selected assemblies

Aftermarket / Verified Equivalents:

• Aftermarket 1503/1630 oil-filter O-ring sets commonly include 420850502

• Generic O-rings should not be used without confirming size and oil-resistant material

🚤 Compatibility

Commonly used on:

• GTI, GTS, GTR and GTX 1503/1630 models

• RXP, RXT and Wake 1503/1630 models

• Selected Sea-Doo 4-TEC jet boats

• Only lubrication assemblies whose diagram specifies 420850502

Typically suits:

• HP Range: Approximately 130-325 HP across supported engines

• Engine / Drive Type: 1503 cc or 1630 cc Rotax 4-TEC/ACE lubrication system

• Year Range: Approximately 2004 onward, engine revision dependent

• Serial / Model Identification: Confirm the oil-filter housing diagram and original O-ring number before installation.

🔌 Function

Seals the oil-filter housing joint to retain engine oil and oil-system pressure.

Common signs replacement or service is required:

• Oil leakage around the filter housing

• O-ring is flattened, swollen, brittle or cut

• Oil-pressure warning appears after filter service

• Seal has been pinched or installed in the wrong groove

📦 Condition

• Genuine Sea-Doo / BRP OEM part

• Brand new

• Supplied in genuine BRP or equivalent protective packaging