93102-43M42 Yamaha Oil Seal | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Upper Crankshaft Oil Seal - Part Number: 93102-43M42

A genuine Yamaha SD-type upper crankshaft oil seal for selected 20HP to 60HP four-stroke outboards.

The seal fits around the upper crankshaft and retains engine oil within the cylinder block while preventing dirt, moisture and crankcase vapour leakage.

⚙️ Key Features

• Genuine Yamaha OEM crankshaft oil seal
• Correct Yamaha part number 93102-43M42
• Used on two-cylinder, three-cylinder and four-cylinder four-stroke engines
• Shared with selected Mercury, Mariner and Parsun outboards
• WSM and Parsun replacements available

🚤 Compatibility

Commonly used on

• Yamaha and Mercury four-stroke crankshaft and cylinder-block assemblies

Typically suits

• Engine models:
• Yamaha F20 and F20A
• Yamaha F25A, F25D and T25 / FT25
• Yamaha F30A and F30 four-stroke
• Yamaha F40A, F40B and F40 four-stroke
• Yamaha F45 regional applications
• Yamaha F50A, F50F and T50 / FT50
• Yamaha F60A, F60C and T60 / FT60
• Mercury / Mariner 25HP to 60HP four-stroke engines using 825027, 893949 or 8M0151047
• Parsun F20, F25, F40, F50 and F60 crankshaft assemblies
• HP Range: 20HP - 60HP
• Engine Type: Yamaha / Mercury / Mariner / Parsun four-stroke outboard
• Year Range: Approximately 1996 - 2021, dependent on engine family

🔌 Function

The seal retains engine oil around the upper crankshaft and prevents contamination or vapour leakage through the crankshaft opening.

⚠️ Common Signs of Failure

• Engine oil leaks near the flywheel or crankshaft
• Oil mist accumulates beneath the top cowl
• Crankshaft seal lip becomes hardened or worn
• Engine oil level drops without an external sump leak
• Seal is damaged during crankshaft or powerhead servicing

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 93102-43M42 current Yamaha OEM service reference

OEM / Related Numbers

• 93102-43M42
• 93102-43M42-00
• 9310243M4200
• Mercury / Mariner: 26-825027
• Mercury / Mariner: 825027
• Mercury / Mariner: 26-893949
• Mercury / Mariner: 893949
• Mercury / Mariner: 8M0151047

Aftermarket / Verified Equivalents

• WSM: 552-36
• Parsun: PAF25-05020003
• Offshore Marine: 122-17-93M42
• Mercury / Mariner: 8M0151047

📦 Condition

• Genuine Yamaha part
• Brand new
• Supplied in original or equivalent packaging