Universal Pinion – Fits Tohatsu Nissan 9.9HP 15HP 18HP M9.9D2 M15D2 M18E2 (Replaces 350-63064-0, 350-63064, 350-63064M)

Product Details

This Universal Pinion is designed for Tohatsu and Nissan outboard engines rated at 9.9HP, 15HP, and 18HP, including models M9.9D2, M15D2, M18E2, NS9.9D2, NS15D2, and NS18E2. Manufactured to OEM-equivalent specifications, this aftermarket pinion fits seamlessly into throttle mechanism and assembly kit configurations for 2003 model year engines.

Direct replacement for OEM part numbers 350-63064-0, 350-63064, and 350-63064M, ensuring proper interchange and fit across compatible engine series.

• Used in throttle mechanism (tiller handle) and assembly kit systems
• Precision-engineered for reliable engagement and durability
• Essential component for maintaining smooth throttle operation

Part Number Matrix

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

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Technical Specs

Manufacturer Part Number

350-63064-0, 350-63064, 350-63064M

Application

Throttle Mechanism (Tiller Handle) / Assembly Kit

Compatible Brands

Tohatsu, Nissan Marine

Compatible HP Ratings

9.9HP, 15HP, 18HP

Type

Universal Pinion

What's in the Box

• 1× Universal Pinion

(The package contains all the parts shown in the picture.)

Installation Notes

1. Disconnect the battery and remove any fuel line connections before beginning work on the throttle assembly.
2. Access the throttle mechanism by removing the tiller handle cover or relevant engine cowling as required for your model.
3. Carefully note the orientation and position of the old pinion before removal to ensure correct reinstallation.
4. Remove the worn or damaged pinion, taking care not to force or damage surrounding components.
5. Clean the mating surfaces and inspect adjacent gears or linkages for wear or damage.
6. Install the new universal pinion in the same orientation as the original part.
7. Ensure full engagement with mating gears and verify smooth rotation by hand.
8. Reassemble the throttle mechanism, tighten all fasteners to manufacturer specifications, and test throttle movement through full range before operation.

Troubleshooting & FAQ

How do I know if the pinion needs replacement?

Common signs include rough or inconsistent throttle operation, clicking or grinding noises when adjusting the throttle, or visible wear/damage to the pinion teeth. If the throttle feels sticky or does not return smoothly, inspect the pinion and surrounding linkage.

Will this fit both Tohatsu and Nissan engines?

Yes, this universal pinion is compatible with both Tohatsu and Nissan marine outboards in the specified HP ranges and model years. Nissan Marine engines of this era share many components with Tohatsu designs.

Can I install this pinion myself?

Installation is straightforward for those with basic mechanical skills and familiarity with outboard engine service. However, professional installation is recommended if you are unsure about disassembly procedures or proper alignment of throttle components.

Is lubrication required after installation?

Yes, apply a thin coat of marine-grade grease to the pinion teeth and mating surfaces during installation to ensure smooth operation and reduce wear. Avoid over-greasing, which can attract dirt and debris.

What if my throttle still feels rough after replacing the pinion?

Inspect the entire throttle linkage, cables, and associated gears for wear, corrosion, or binding. Verify that all components are properly aligned and that cable tension is correctly adjusted. If problems persist, consult a marine technician.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.

Shipping speed & cost

We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.

Warranty & returns

Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.

Safety & Important Info

• Verify images/specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
• This is an aftermarket replacement, not an OEM component.
• Professional installation is recommended for safety and performance.

About Sea Sierra

• Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
• Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
• Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.