OMC Johnson Evinrude NEW OEM 303067 Drive Shaft O-Ring Seal (LOT OF 4) 0810

OMC Johnson Evinrude Drive Shaft O-Ring — Part Number 303067

Brand: OMC Johnson Evinrude | Condition: New Old Stock (NOS)

Genuine OMC factory part number 303067 (also catalogued as 0303067), the drive shaft O-ring, measuring 0.360 in inside diameter × 0.100 in cross-section. It serves Johnson and Evinrude 9.9 and 15 HP outboards and OMC Cobra sterndrives from 3.0L through 7.4L — and it crosses to an unusually wide set of other marine brands besides. This is new old stock from long-term dealer inventory, a genuine OMC component rather than a generic ring from an assortment box.

The drive shaft O-ring seals where the drive shaft passes through its housing, keeping gear lubricant in and water out. On a 9.9 or 15 HP outboard, and on a Cobra outdrive, this is one of the small seals standing between the lower unit's oil and the water it runs in. When it hardens and shrinks, water finds its way past, the gear oil turns milky, and the bearings and gears corrode from the inside. The seal costs a dollar or two; the lower unit it protects does not.

What makes this one worth having on the shelf is the breadth of the interchange. The same ring is catalogued by OMC, Volvo Penta, Mercury, MerCruiser, Chrysler, Force, US Marine and the major aftermarket houses — one part number answering searches across most of the American marine industry.

Condition Details

New old stock. The O-ring is unused and has never been installed. As with all warehouse-stored inventory, the packaging may show shelf wear, dust, fading, price stickers, scuffs or minor crushing from stacking; OMC small rubber parts of this era were commonly supplied in plain dealer bags rather than branded blister packs. The ring itself is round, supple and uncreased, with no flat spots, splits or compression set from storage. Elastomer seals do have a finite shelf life, so we recommend inspecting the ring on arrival and before installation. Please review all photos, as what is pictured is what you will receive.

Specifications

• Part Number: 303067 (OMC long form 0303067)
• Part Name: Drive Shaft O-Ring
• Manufacturer: OMC (Outboard Marine Corporation), later BRP
• Inside Diameter: 0.360 in (9.1 mm)
• Cross Section: 0.100 in (2.5 mm)
• Material: rubber elastomer
• Location: drive shaft seal position
• Sold: see listing quantity
• Genuine OEM, not aftermarket

Superseded & Cross Reference Part Numbers

OMC 303067 interchanges with the following. This is one of the broadest cross-brand O-ring interchanges in the marine industry — always confirm against your own application guide before ordering.

• OMC / Johnson / Evinrude: 303067, 0303067
• Sierra Marine: 18-7116 (also designated AP-273)
• Volvo Penta: 3852045-8
• Mercury / MerCruiser: 25-85148, 25-20633, 25-22174, 25-62704, 802206
• Chrysler / Force / US Marine: 25-F24342, 25-62704
• GLM Products: 81100
• Also catalogued under Mallory and Yamaha applications

If your parts list or counter quote shows Sierra 18-7116, Volvo Penta 3852045-8, any of the Mercury 25-xxxxx numbers, or GLM 81100, this listing is the genuine OMC original for that reference.

Features

• Genuine OMC factory part, made to the original material and dimensional specification
• Precise 0.360 in bore with a 0.100 in section, so it seats and compresses exactly as the groove was machined for
• Correct elastomer compound for gear lube on one side and prolonged water immersion on the other, including saltwater service
• Keeps water out of the lower unit, preventing the milky-lube condition that corrodes bearings, gears and shafts
• Exceptionally wide interchange — the same ring serves OMC, Volvo Penta, Mercury, MerCruiser, Chrysler, Force and US Marine applications under their own numbers
• Non-metallic, so nothing to corrode or seize against aluminium castings
• Single-use by design — replaced whenever the drive shaft housing is disturbed, never reused
• Inexpensive insurance on a job nobody wants to do twice

Application

Johnson and Evinrude outboards:

• 9.9 HP and 15 HP

OMC Cobra sterndrives:

• 3.0L through 7.4L — the full Cobra range

Plus Volvo Penta, Mercury, MerCruiser, Chrysler, Force and US Marine applications under their own OEM numbers listed above.

Because this ring is a standard small size used across many manufacturers and assemblies, buyers should confirm 303067 — or the cross-reference number for their brand — against the exploded diagram for their specific motor or drive before ordering. The surest method is to measure the ring you are replacing: ID 0.360 in and cross-section 0.100 in. If you send us your model number and year we will check it against the parts catalogue for you.

Why Choose OMC Johnson Evinrude?

Outboard Marine Corporation built Johnson and Evinrude outboards and the Cobra sterndrive line for most of the twentieth century, and set the standard for American marine propulsion engineering. OMC-numbered parts were manufactured to tight factory tolerances and specified for the marine environment, which is why decades-old OMC motors and drives are still in service today. On an O-ring the dimensions are easy to match from a chart; what is not easy to match is the compound, which has to stay flexible in gear oil and salt water for years rather than hardening and letting water past.

Returns

We accept returns through eBay's standard 30-day return request process. If the part is not what you need, simply open a return request through eBay within 30 days of delivery and we will take care of it.

Thank you for looking. We are a small parts business and we take real care in identifying, describing and packing every item we list. If anything about this part is unclear, or if you want additional photos or measurements before you buy, please message us — we would much rather answer a question up front than have you receive something that is not right for your machine.

If there is any problem at all with your order, please contact us first and give us the chance to make it right before leaving feedback. We respond quickly and we will resolve it.

QBS Parts, Inc — Gardena, CA