Yamaha Complete Lower Unit Assembly – Fits 25HP, 30HP, & 40HP 2-Stroke Outboards
$1,200.00
Get your boat back on the water with this high-quality, complete replacement lower unit assembly. Specially engineered to fit Yamaha 25HP, 30HP, and 40HP 2-Stroke outboard motors, this gearbox unit has been fully inspected, pressure-tested, and verified for smooth shifting mechanical performance. Whether you are replacing a cracked casting, stripped gears, or a bent propshaft, this ready-to-install assembly offers an affordable, reliable solution to restore your marine engine’s performance.
Key Specifications Table
| Attribute | Value |
| Brand | Yamaha Marine (Aftermarket/OEM Replacement) |
| Component | Complete Lower Unit / Gearbox Assembly |
| Engine Compatibility | 25HP, 30HP, & 40HP |
| Engine Cycle | 2-Stroke |
| Condition | Fully Inspected & Functional |
| Included Components | Housing, Driveshaft, Propshaft, Internal Gears & Water Pump Base |
| Shifting | Smooth Forward – Neutral – Reverse |
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Description
Reliable Restoration: Yamaha 2-Stroke Lower Unit Assembly
Don’t let a damaged gearbox keep you docked. This complete lower unit assembly is the ideal drop-in replacement for worn, seized, or impact-damaged lower casings on mid-range Yamaha 2-stroke outboard motors (25HP, 30HP, and 40HP).
Inspected & Water-Ready: Every unit undergoes a comprehensive multi-point inspection. The internal gears, clutch dog, and bearings have been checked to ensure crisp, positive gear engagement and smooth rotating performance. The driveshaft splines and propeller shaft are straight, free of severe corrosion, and ready to link directly back up to your powerhead.
Key Product Features:
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Direct Fit Design: Built to exact dimensional specifications for a seamless installation onto compatible 25, 30, and 40 horsepower 2-stroke Yamaha outboards.
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Complete Assembly: Includes the main gearcase housing, internal gear set, shift rod connection, driveshaft, and propshaft.
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Corrosion-Resistant Finish: Finished in classic Yamaha marine grey to match your outboard’s original factory aesthetics while providing vital protection against freshwater and marine elements.
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Cost-Effective Repair: Avoid the tedious, highly technical labor costs of rebuilding a broken gearcase piece-by-piece with this convenient bolt-on swap.
Note: We highly recommend replacing the water pump impeller and adding fresh marine gear lube prior to your initial startup.
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