The lower unit store

The lower unit store DEFAULT

NEW & Professionally Refurbished Lower Units & Outdrives 

 We sell 

lower units for boats, lower units for mercury, lower units for outboards, lower units sei, lower units for evinrude

lower units for yamaha, used lower units, lower units for sale in florida, lower units for sale in Cape Coral,

lower units for sale in Fort Myers, 

We offer yamaha lower units for sale, suzuki lower units for sale, evinrude lower units for sale, johnson lower units for sale, honda lower units for sale, boat lower units for sale, mercruiser lower unit for sale

lower units for mercury outboard, lower unit for mercury 250 pro xs,lower unit for mercury 225

lower unit for mercury 150, lower unit for mercury 9.8, lower unit for mercury 25, lower unit for mercury optimax

lower unit for mercury 225 pro xs, used lower units for mercury outboards, lower units for outboards

lower units for yamaha outboards, replacement lower units for outboards, lower unit for outboard motor,

lower units for mercury outboard, lower units for johnson outboard motor, used lower units for outboard motors

used lower units for mercury outboards, lower units sei, yamaha lower units sei, outboard lower unit seized

mercury lower unit sei, sei lower units review, lower units for evinrude, lower unit for evinrude 150

lower unit for evinrude 225, lower unit for evinrude 140, lower unit oil for evinrude

used lower unit for evinrude, aftermarket lower unit for evinrude, lower unit evinrude outboard

lower unit for 48 hp evinrude, lower unit for 50 hp evinrude, lower units for yamaha outboards, 

lower units for yamaha, lower unit for yamaha 150, lower unit for yamaha 115

lower unit for yamaha 225, lower unit for yamaha 250, lower unit for yamaha pro v 150

lower unit oil for yamaha outboards, lower unit oil for yamaha, used lower unit for yamaha

used lower units, used lower units mercury, used lower units yamaha, used lower units johnson

used lower units for outboard motors, used lower units for mercury outboards

used lower units florida, used lower units evinrude, used lower units mercruiser, used lower units suzuki,

lower unit repair, gear case repair, outdrive repair, prop shaft repair, drive shaft repair, propeller, repair,

boat prop repair, remanufactured gear case, remanufactured lower units, 


We Gladly Accept

©Copyright. Sterndrive Engineering Inc. All Rights Reserved.

The three year fault-free warranty covers any damage to the drive that requires it to be repaired or replaced including failures resulting from lack of oil, fishing line, impact, neglect, and other abuse. Sterndrive Engineering, Inc. (SEI) manufactures a stern drive designed to replace Mercury Marine's MerCruiser®, Alpha One®, R, MR, Gen II and Bravo One® stern drives. MerCruiser®, Alpha One®, Gen II, R, MR and Bravo One® are trademarks of the Brunswick Corporation. SEI has no affiliation with the Brunswick Corporation. Consequently, any warranties governing products manufactured and/or sold by Brunswick Corporation will not apply to products manufactured and/or sold by SEI, or to products damaged due to the operation of an SEI product. Sterndrive Engineering, Inc. is not affiliated with Mercury®; Yamaha®; OMC® or their products. All reference to their trademarks and trade names are the property of the respective owners.

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Remanufactured lower units

Lowerunits elements

Your lower unit may have had problems over the years, or have a larger issue and be completely out of commission. A replacement lower unit can help you avoid the expense and uncertainty of a complete rebuild. Back to the original specs, the original performance, the original thrills. Guaranteed.

Crowley Marine brand lower units (gearcases) are built to strict OEM specifications, include brand new parts every time and perform like new. In addition, many units include various engineering upgrades to improve the life and performance of your gearcase. With over 10,000 satisfied customers our lower units have been proven in various applications from recreation to commercial and everything in between. All units include a 12 month warranty.

We also stock new OEM Mercury, BRP (Evinrude & Johnson) and Yamaha lower units directly from the manufacturer.

Ready to order? Feel free to compare us to the competition. Have a question? contact us anytime. Whatever your lower unit needs may be, we have the exact part in stock and ready for delivery.

Sterndrive build process

Expertly built in the USA

Typically, our builders will assemble the lower units in batches of a single model. Building multiple identical gearcases at the same time ensures accuracy and consistency across the board. It also allows us to keep plenty of inventory for each model.


In stock, ready to ship

Utilizing 3 large warehouses allows us to keep plenty of lower units on hand and ready to ship. Because of our large inventory, most lower units will ship out the very same day you place the order. We also keep a very extensive inventory of gearcase cores. This allows us to quickly build more gearcases when particular models run low on inventory.

All of our lower units are packaged with expandable foam. Our complete line of lower units ship using standard UPS or FedEx ground service. Expedited and international shipping options are also available.


12 month warranty

All lower units, whether Crowley Marine brand or OEM include a full 12 month warranty. The majority of our customers never have any issues with their lower unit or installation, however in the rare case something does arise you can rest assured that you will be covered.


Used Lower Units for Boats

The Boat Yard has a wide variety of used outboard lower units for sale. We have a wide variety of lower units from all major brands in stock. We have modern and antique used outboard lower units that are hard to find. Here at The Boat Yard we have all types of lower units for large and small outboard motors. Our gear cases are in great shape and we test everything to make sure that it is in good working order. We carry used Yamaha lower units, Johnson lower units, Evinrude lower units, Mercury lower units, Honda lower units, Suzuki lower units, Mariner lower units, and many others.

We do not have low quality aftermarket lower units imported from overseas. We have the real deal. We carry only used genuine lower units and lower unit parts. The lower units that we have in stock will save you time and money. All of our lower units come with a 30 fault free warranty.

We encourage you to experience the quality, support, and performance of our high quality used replacement lower units. You will also and have the peace of mind of our 30-day fault-free warranty.

We stand behind all parts and products for your peace of mind. Be sure to fill out the Parts Request Form so we can help you find what you are looking for. Be sure to put in the year of motor that you have and if possible the part number.

Feel free to give us a call at (504) 340-3175 with any questions or concerns that you may have. We will be more than happy to talk you through the process.


Lower store the unit

Lower Unit Products

Complete Lower Units

We sell a growing line of complete lower unit and outdrives that have been opened, inspected, pressure-checked, and are ready for use. Any issue will be noted in the listing. At your request, we can install any necessary seals or impellers prior to shipping.

View Complete Lower Units

Empty Housings

We have a large supply of empty cases, many of which have not yet been listed. Each empty case is cleaned, inspected for damage, and sold as ready for rebuild. If you don’t see what you need, don't hesitate to contact us.

view Empty Housings

Drive Shafts

Each driveshaft is polished on the lathe. Splines are soda blasted for a perfectly inspectable surface. Shafts are sold free of rust, grease, dirt, etc…bearing surfaces have been inspected to factory specs and any flaw will be noted in the listing.

View Drive Shafts

Propeller Shafts

Every propshaft has been put on the lathe for polishing and inspection for straightness. As a final step, we tape off the bearing surfaces and soda blast them. By doing so, we can better inspect every surface of each shaft, ensure that it is suitable for use, and you will receive a shaft that looks as close to new as we can provide.

View Propeller Shafts


Without a doubt, we have one of the finest selection of used gears in the country. Each gear is removed, cleaned, and soda blasted. We've taken the guesswork out of used gears by providing surfaces that are so clean as to make flaws stand out. This has become the go-to place for a number of lower unit rebuilders over the years because we only sell gears that are in excellent, usable condition and ready for install.

View Gears

Bearing Carriers

Bearing carriers are soda blasted, then centrifugally polished. The final product is a carrier that has had every bit of dirt, grease, and carbon removed for inspection and looks as close to new as we can get it.

View Bearing Carriers

Upper & Lower Shift Rods

Each shift rod is polished, checked for straightness, and ready for installation.

View Upper & Lower Shift Rods

Impellers, Water Pumps, Seals, & Bearings

We only sell new, or high quality aftermarket replacement parts such as impellers, water pumps, seals, etc…If you need a part and do not see it, please don't hesitate to ask.

View Impellers, Water Pumps, Seals, & Bearings

Propellers & Hardware

We have many stainless and aluminum propellers, as well as the hardware to install them. Each prop is inspected for damage that will affect the working condition of the part.

View Propellers & Hardware


View Miscellaneous Products

* Note: for propellers, please go to the category "General".

* Note: for Sterndrive Uppers and Driveshaft Housings, please see "Sterndrive & Jetdrive Parts".

The Lower Unit Store

I want her. I tell her about it. She begs, asks not to enter it.

Now discussing:

He laid me down on a wooden bench. He took a washcloth and began to wash me. first my back. then he pulled me onto my stomach.

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