Engine Timing Belt – Fits Yamaha F9.9, FT9.9, T9.9 Outboards (Replaces 6G8-46241-00-00, 18-15133)

Product Details

This OEM-quality Engine Timing Belt – Fits Yamaha F9.9, FT9.9, T9.9 Outboards (Replaces 6G8-46241-00-00) is designed for Yamaha 4-stroke outboard engines including F9.9 (1985–2005), FT9.9 (1985–2005), and T9.9 (1991–2005) models. It is crucial for synchronizing camshaft and crankshaft rotation, ensuring reliable engine performance.

It serves as a direct replacement for Yamaha part number 6G8-46241-00-00 and aftermarket equivalents like Sierra 18-15133.

• Installation: Direct OEM-spec replacement for a precise fit.
• Material: Constructed from a durable, high-strength rubber/synthetic compound for longevity.
• Function: Restores engine timing to factory specifications for optimal power and efficiency.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Engine & Model Compatibility

Confirm your engine model and year in the table below to ensure correct fitment.

Technical Specs

Product Type

Engine Timing Belt

Installation

Direct OEM Replacement

Housing Material

Rubber/Synthetic Compound

Housing Color

Black

Warranty

Typically 1 year against manufacturing defects

Other Technical Attributes

Used for synchronizing camshaft and crankshaft rotation

What’s in the Box

• 1 x Engine Timing Belt (6G8-46241-00-00)

Installation Notes

1. Disconnect the negative battery terminal to prevent accidental engine start.
2. Remove the engine cowl and flywheel cover to access the timing belt area.
3. Carefully align the timing marks on both the camshaft and crankshaft sprockets as specified in your engine's service manual. This step is critical.
4. Loosen the timing belt tensioner pulley and carefully slide the old belt off the sprockets.
5. Inspect the tensioner and sprockets for any signs of wear, damage, or misalignment. Replace any worn components.
6. Install the new timing belt, ensuring it engages correctly with the sprocket teeth and that any directional arrows are oriented properly.
7. Re-tension the belt according to the manufacturer's torque specifications. Do not over-tighten, as this can cause premature wear.
8. Manually rotate the crankshaft several full rotations to ensure the timing marks remain perfectly aligned.
9. Reinstall the flywheel cover and engine cowl, and reconnect the battery.
10. Start the engine and listen for any unusual noises. Let it run at idle to confirm smooth operation.

Troubleshooting & FAQ

Safety & Important Info

• Verify images and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not purchase.
• This is an aftermarket replacement component, not an original equipment manufacturer (OEM) part.
• Professional installation is recommended for safety and optimal performance. Incorrect installation can lead to engine damage.

About Sea Sierra

• Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
• Fast Global Fulfillment — We offer free standard delivery to most regions, with an average transit time of 5–15 days.
• Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.