Crowley Marine

Crowley Marine Authorized dealer of OEM boat motor parts & assemblies of Mercury, Yamaha, Evinrude & Johnson, Suzuki

When James and Verna started the business in 1970, they did things the old-fashioned way, treating customers like family. Today, 50 years later, we strive to continue the tradition with our loyal crew who have been part of our extended family for many years. We think you'll appreciate our knowledge of the industry and the products we offer. Crowley Marine was one of the first marine dealers to off

er an online parts lookup. Since then, our parts diagrams have evolved becoming even more popular. This is just one example of how we aim to provide a high level of online services so you can easily find your parts and have more time to enjoy the waters. We know you'll appreciate our approach to customer service too. The way we see it, there's nothing more important than our customers. We see to your needs and adapt to provide the best service possible. As we look back on our 50 years, we are fortunate to have made many friends along the way. We look forward to meeting you and helping you get back on the water so you can enjoy with family and friends!

05/21/2026

How to Choose the Right Shaft Length for Your Mercury Outboard Motor ⬇️

When selecting a Mercury outboard motor for your boat at Mercury Outboard Depot, ensuring you have the correct shaft length is critical for optimal performance and safety. Here’s a simple guide to help you make the right choice.

Step 1: Locate the Measurement Points

Top of the Boat Transom: This is the upper end of the back section of your boat where the motor is mounted.

Bottom of the Boat (Lowest Point): The lowest part of your boat’s hull at the back.

Step 2: Measure the Height

Using a tape measure, determine the vertical distance from the top of the boat transom to the bottom of the boat. This is the area where the engine will hang.

Step 3: Select Your Shaft

Based on the distance you measure, choose from the following shaft lengths for your Mercury outboard motor:

14» - 17 1/2»: You need a «Short» shaft (15»).
18» - 22»: A «Long» shaft (20») is suitable.
22 1/2» - 27»: Go for an «Extra/Ultra Long» shaft (25»).

Correct shaft selection ensures that the motor’s cavitation plate is at the right height, minimizing drag and avoiding potential damage from underwater hazards. It also optimizes the boat’s overall performance.

📷:
https://youtube.com/

05/01/2026

Outboard motor pre season checklist ✅

04/28/2026

Choosing the right marine part isn’t always as simple as it seems.

Even a small mistake can lead to fitment issues, delays, or engine problems. At Crowley Marine, we understand that — which is why we invest in training our support team.

We focus on:

✔️ Understanding how engine systems actually work
✔️ Knowing common failure points
✔️ Working through real customer cases

So when you reach out, you’re not getting a guess — you’re getting a well-informed answer.

👉 Our goal is simple: help you get the right part the first time.

www.crowleymarine.com

04/27/2026

What to do if your engine is overheating!

🤫 Thats not the only cause of an overheating engine, if your can see it peeing water from the weephole, then the pump is working, so you might have a stuck thermostat. You could also have a blown head gasket. Fan clutch or electric fan or both could be bad.

📷:
https://youtube.com/offthedockuniversity

04/17/2026

Your knot is 🫠! Here’s the fix.

The clinch knot is ok for fishing, but there is a much better knot called the improved clinch knot. This is one of the best fishing knots for beginners. Another easy strong fishing knot is the palomar knot.

📷:
https://youtube.com/FishingExplained

04/07/2026

How a Flexible Impeller Pump Works | Rotary
Pump Mechanism Explained ⤵️

This animation explains the working principle of a Flexible Impeller Pump, a type of positive displacement rotary pump widely used in marine, food, and chemical applications.

The pump uses a flexible rubber impeller that rotates inside an eccentric casing. As the impeller blades bend and unbend during rotation, they create variable chamber volumes - drawing fluid in on one side and pushing it out on the other.

💡Key working stages:

1️⃣ Suction zone: Vanes straighten, creating vacuum to draw fluid in.
2️⃣ Transfer zone: Fluid is carried between vanes in sealed chambers.
3️⃣ Discharge zone: Vanes bend again, compressing and expelling the fluid.

The elastic deformation of the impeller ensures continuous flow, excellent self-priming, and gentle handling of fluids — even viscous or sensitive ones.

📷:
https://youtube.com/


PumpMechanism

Address

2134 Curtis Street Unit 302 Denver, CO US
Denver, CO
80205

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm

Telephone

+18005800720

Website

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