688-45997 Thrust Washer Propeller Spacer for Yamaha | JLM Marine

688-45997 Thrust Washer Propeller Spacer for Yamaha Outboards

This thrust washer propeller spacer is designed for Yamaha outboard engines ranging from 50 HP to 300 HP. Engineered to fit a wide range of T-series, C-series, and standard horsepower models, this spacer ensures proper propeller alignment and smooth operation. It features 15 splines for secure fitment and reliable performance.

This aftermarket replacement directly substitutes Yamaha 688-45997, 688-45997-00, and 688-45997-01-00, as well as equivalent parts from Sierra (18-4274) and GLM (22191). Built to OEM specifications, it delivers dependable service across dozens of Yamaha outboard configurations.

• 15-spline design for secure propeller mounting
• Direct fit for Yamaha T-50 through 300 HP models
• Crosses multiple OEM and aftermarket part numbers

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Yamaha owners, here's a guide to help you identify your engine's serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.

Technical Specifications

Package Contents

The package contains all the parts shown in the product images:

• 1 × Propeller Spacer (Thrust Washer)

Installation Guide

1. Disconnect the battery and ensure the engine is off. Remove the propeller nut and any retaining hardware.
2. Slide off the existing propeller, noting the order of washers and spacers. Inspect the propeller shaft for damage or corrosion.
3. Remove the old thrust washer or spacer from the shaft. Clean the shaft surface thoroughly to ensure proper seating.
4. Slide the new thrust washer onto the propeller shaft, aligning the 15 splines correctly. Ensure it seats flush against the gearcase.
5. Reinstall the propeller, ensuring all washers and spacers are in the correct sequence. Hand-tighten the propeller nut initially.
6. Torque the propeller nut to the manufacturer's specification (consult your Yamaha service manual). Install the cotter pin or retaining clip securely.
7. Reconnect the battery and test the propeller for smooth rotation and proper alignment. Check for any unusual vibration or noise during a test run.

Troubleshooting & FAQ

Q: How do I confirm this thrust washer fits my Yamaha outboard?
A: Check the compatible models table above or verify your original part number against the cross-reference list. If your engine model matches and the spline count is 15, this spacer will fit.

Q: What are the signs that my thrust washer needs replacement?
A: Common symptoms include excessive propeller play, vibration during operation, or visible wear/deformation on the washer. If the propeller feels loose or wobbles, inspect and replace the thrust washer immediately.

Q: Can I reuse the old thrust washer if it looks okay?
A: It's not recommended. Thrust washers compress and wear over time, even if damage isn't visible. Replacing it during propeller service ensures optimal performance and prevents future issues.

Q: How often should I replace the thrust washer?
A: Replace the thrust washer whenever you replace the propeller or if you notice any signs of wear, corrosion, or damage. Regular inspection during routine maintenance is recommended.

Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.