When it comes to maintaining or upgrading your boat's outboard motor, one crucial measurement you'll need is the shaft length. The shaft length of an outboard motor determines how deep the motor sits in the water and plays a critical role in ensuring your boat performs efficiently. Whether you're replacing a propeller, installing a new motor, or adjusting your boat’s setup, knowing how to measure the outboard motor shaft size is key to making sure everything fits correctly. Mercury, Yamaha, Suzuki, and all other outboard brands fit the same criteria for measuring.


Catching Rays & Making Waves
Family fun in the sun
11% Off Sitewide
Shop Seats & PedestalsShop Leaning Posts & Towers
Shop Engines & Motors
![]() |
Our Daily Catch
Featured products caught daily
- MasterCraft Boat Tower Speaker Light Ring 404865 | 8.5 Inch RedGLS Stock #: 8403179-FE501Sale Price $106.76 Regular Price: $119.95
- Taylor Made Boat Windshield Hardware 884-004006699 | MasterCraft (Kit)GLS Stock #: 8403178-FH482Sale Price $32.00 Regular Price: $35.95
- MasterCraft Boat Cockpit Insert Accent Panel 542241 | X45 2005 (PORT)GLS Stock #: 8403255-NK140Sale Price $97.86 Regular Price: $109.95
- MasterCraft Boat Cockpit Insert Accent Panel 542240 | X45 05-06 (STBD)GLS Stock #: 8403257-NJ220Sale Price $97.86 Regular Price: $109.95
- MasterCraft Boat ZFT4 Speaker Cans 404834 | 8.5 Inch Smooth (Pair)GLS Stock #: 8403136-PD205Sale Price $3,122.12 Regular Price: $3,508.00
- MasterCraft Boat ZFT4 Speaker Cans 404856 | 7.5 Inch Silver (Pair)GLS Stock #: 8403174-FE463Sale Price $2,119.09 Regular Price: $2,381.00
- MasterCraft Boat Propeller Shaft 205338 | Prostar 49 1/2 x 1 1/8 InchGLS Stock #: 8403261-EC300Sale Price $364.86 Regular Price: $409.95
- Medallion Boat Ballast Gauge 508058 | MasterCraft MTS 2 InchGLS Stock #: 8403159-AT789Sale Price $605.16 Regular Price: $679.95
Popular Categories
What's trending among our customers
Notes From The Skipper
Tips for your boat
- Continue Reading
- Continue Reading
Mercury Marine is a renowned name in the boating world, known for its superior quality and cutting-edge technology. Here’s why Mercury outboards are an excellent choice: Unrivaled Performance, Innovative Technology: Features like SmartCraft digital technology provide real-time diagnostics and enhanced control and are designed to endure harsh marine environments.
- Continue Reading
What's more satisfying than a good day spent on the boat? Maybe knowing that you've worked on it yourself! DIY work doesn't have to mean slapdash or chintzy. With quality parts, the right tools, and some spare time, you can make improvements you can be proud of.
- Continue Reading
Spring is the time for rejuvenation and renewal. What better way to prepare for the oncoming boat season than to enter it with new seats. Follow the steps below for a fun and customizable DIY project.
Testimonials
What our customers are saying
-
This place is new to me. I have been out of the boat ownership picture for years. I made a big order and by my own error, i ordered the wrong item. GLS has a second to none customer service in all aspects of doing business on-line. I cannot emphasize the happiness and stress free experience enough. I highly recommend your hard earned dollars to be spent at Great Lakes Skipper.
Al
-
The customer service is great up to the point where you have to return a product. I ordered a boat cover for my 2019 Sun Tracker and mistakenly ordered one for a 2018. It obviously didn’t fit, so I searched until I found the cover for a 2019 and returned the 2018 cover. They waved the restocking fee because I ordered a new one. The second cover doesn’t fit either. This time the return was paid for.
Tim P
-
I had difficulty ordering on line with a Canadian credit card and shipping to the boat in Florida It was easily taken care of over the phone. Very efficient people. Good pricing. I like them.
Rick L
-
Alexis helped me with my purchase. She was knowledgeable and patient. She was able to assist me with pricing and shipping to make the deal. I highly recommend Alexis for the highest level of assistance you could receive at Great Lakes Skipper.
Neil T