O-ring for Yamaha outboard lower units, designed to seal the bearing carrier within the drive shaft housing.

Manufactured to OEM specification, this O-ring provides reliable sealing performance, helping prevent water ingress and protect internal components in harsh marine environments.

Replaces Part Number

93210-66M98-00
93210-66M98
Sierra: 18-0299
GLM: 84265

Fitment

Yamaha Outboards (6H4 / 6H5 / 6E9 Series)

• 40 HP – Models with 6E9 / 6H4 serial ranges
• 50 HP – Models with 6H5 series
• 55 HP – Selected models

Typical Year Range:
• 40HP – 1984–1993
• 50HP – 1984–1993
• 55HP – 1989–1993

Fits a range of 2-stroke and compatible models.

IMPORTANT

This O-ring corresponds to No. 52 on the Yamaha lower unit diagram (bearing carrier assembly).

Please confirm compatibility with your engine model and serial number before purchase, as variations may exist.

Details

• Product: O-Ring
• Type: Aftermarket replacement
• Application: Bearing carrier seal (lower unit)
• Engine Type: Yamaha Outboards
• Direct replacement – no modification required

Why Buy from SSI Marine

Workshop-tested aftermarket & OEM-spec parts
Fast UK dispatch (same-day before 1 PM Mon–Fri)
Tracked 24-hour UK delivery
UK stock – collection available from Leigh (Manchester)
Technical support available

Buyer Responsibility

Please confirm compatibility with your engine model and serial number before purchase.
If unsure, contact us — our technical team will be happy to help.

40-55HP Yamaha Outboard O-Ring 93210-66M98 – Replaces 93210-66M98-00 Bearing Carrier Seal