Stainless steel outboard propeller for Mercury & Mariner outboard engines (25HP–30HP 2 & 4 stroke EFI). Designed for strength, durability, and improved performance over aluminium propellers.

Manufactured to OEM specification, this SSI Marine propeller provides excellent corrosion resistance and long-lasting performance in demanding marine environments.

Fitment

Mercury / Mariner Outboard Engines

2 Stroke:
• 25 HP (Serial number 0N0***** only)
• 30 HP (Serial number 0N0***** only)

4 Stroke EFI:
• 25 HP (Serial number 0R***** & 1R***** only)
• 30 HP (Serial number 0R***** & 1R***** only)

• 10 Tooth Spline models

IMPORTANT

Please check and confirm that 9.9 x 12 and 10 spline is the correct propeller size for your engine.
Also confirm your engine serial number range (0N0 / 0R / 1R) before purchase.
If unsure, please contact us and we will try to advise you.

Details

• Diameter: 9.9
• Pitch: 12
• Splines: 10 (10 Tooth)
• Blades: 3
• Rotation: Right Hand
• Material: Stainless Steel
• Brand: SSI Marine
• 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.

25 30HP Mercury Mariner Outboard Stainless Steel Propeller 9.9 x 12 10 Spline