Sierra 18-15140 Timing Belt, Replaces Yamaha 63P-46241-00-00, Fits F150/LF150 Outboards

The Sierra 18-15140 Timing Belt is a direct-fit replacement timing belt engineered for Yamaha outboard engines that use the Yamaha 63P-46241-00-00 belt. Sierra Timing Belts are built to provide extended durability and smoother performance for the demands of modern marine engines. Construction uses neoprene or nitrile material depending on the application, giving the belt the flexibility and toughness needed for continuous marine use, while a fiberglass tension member delivers excellent flex and elongation behavior over the life of the belt.

The belt features positive slip-proof engagement to keep timing accurate under load, along with chemical and contaminant resistance that supports long service life in a marine environment exposed to fuel, oil, and moisture. Sierra manufactures this timing belt to meet or exceed the original equipment specifications of the Yamaha part it replaces, so it installs and performs as a like-for-like swap. It is designed to fit Yamaha F150/LF150 (2004-11), F150/LF150 (2012-14), and F150B/LF150B (2015-18) outboard engines. This makes the 18-15140 a straightforward choice when replacing a worn, cracked, or stretched timing belt on a compatible Yamaha F150 series outboard.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-15140
• Category: Yamaha Outboard Internal Engine Parts
• Belt Style: Timing Belt
• Material: Fiberglass tension member; neoprene or nitrile construction
• Number of Items: 1
• Weight: 0.4 pounds
• UPC: 808282375720
• OEM Cross-Reference: 63P-46241-00-00

Fitment

• Yamaha F150/LF150 (2004-11)
• Yamaha F150/LF150 (2012-14)
• Yamaha F150B/LF150B (2015-18)

Replaces (OEM)

• 63P-46241-00-00

Frequently Asked Questions

What does the Sierra 18-15140 timing belt fit? The 18-15140 fits Yamaha F150/LF150 (2004-11), F150/LF150 (2012-14), and F150B/LF150B (2015-18) outboard engines.

Is the Sierra 18-15140 the same as the Yamaha 63P-46241-00-00 belt? Yes, the Sierra 18-15140 is designed as a direct replacement for Yamaha OEM part 63P-46241-00-00 and meets or exceeds the original equipment belt specifications.

What is the 18-15140 timing belt made of? Construction uses neoprene or nitrile material depending on the application, with a fiberglass tension member that provides flex and elongation resistance.

How much does the 18-15140 timing belt weigh? The Sierra 18-15140 timing belt weighs 0.4 pounds.

How many belts come in a package of 18-15140? Each package of the Sierra 18-15140 contains one timing belt.

Will the 18-15140 fit a Yamaha F150 from any model year? The 18-15140 is confirmed to fit the F150/LF150 (2004-11), F150/LF150 (2012-14), and F150B/LF150B (2015-18); it is not confirmed for other Yamaha F150 variants outside those ranges.

Does the 18-15140 belt resist fuel and oil contamination? Yes, the 18-15140 is built with chemical and contaminant resistance to support long service life in a marine engine bay exposed to fuel and oil.

What keeps the 18-15140 timing belt from slipping during operation? Positive slip-proof engagement is built into the belt design to maintain accurate timing under load.

Is the Sierra 18-15140 an OEM or aftermarket part? The 18-15140 is an aftermarket Sierra timing belt manufactured to meet or exceed the specifications of the Yamaha OEM belt it replaces.

What is the UPC for the Sierra 18-15140 timing belt? The UPC for the Sierra 18-15140 timing belt is 808282375720.

Why would I need to replace the timing belt on my Yamaha F150? A worn, cracked, or stretched timing belt should be replaced to maintain correct engine timing; the Sierra 18-15140 is the direct-fit replacement for the F150/LF150 and F150B/LF150B outboards listed in its fitment.