Check out our FAQ section below. If you are looking for support documentation including application guides, installation instructions, specification sheets and more visit our Support Documents page.

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How do I know what propeller I need for my particular aircraft?

Go to our Application Guides for Wood, Composite and Aluminum propeller applications.

What is the bolt torque for my propeller?

There is a decal located on the side of the hub of an aluminum and composite propeller that states the bolt torque for your particular size bolt (you will need to know that). Wooden propellers have a sticker on the root of one blade.

Also, the instructions for installing your propeller are located here.

What do all those the letters and numbers in the propeller model mean?
How old is my propeller? What aircraft was it used on?

Check out this link to the documents page that lists propeller serial numbers and the approximate dates they were made. Sensenich has manufactured well over 700,000 propellers in the 75+ years we have been in business. We do not have records stating what aircraft a particular propeller was installed on.

My aluminum propeller model has a letter “M” prefix. I do not see that propeller model listed on your site.

Older model metal propellers that have an “M” prefix are identical to newer models without the prefix. Also you might come across some older model propellers that have variances in the model numbers. Please see the chart listed below for cross reference.

M74DM is equivalent to 74DM6


is equivalent to 76EM8
M76EMMS is equivalent to 76EM8S5
How much does it cost to have my propeller shipped?
Does my propeller come with Bolts?

Composite propellers and metal propellers come complete with all mounting hardware. Wood propellers do not.

How often do I need to re-torque my propeller?

Re-torque intervals vary depending on the type of propeller. Check out this link to the Installation Instructions

What can I use to clean and protect my propeller?

Wood and composite propellers should be waxed with an automotive type paste wax at least once a year. Aluminum propellers should be wiped with a lightly oiled rag. See your propeller installation instructions for more use and care information.

Can I have my prop painted with custom colors?

Custom colors are not available for FAA certified propellers. All experimental and light sport wood and composite propellers can be painted in our custom colors. Our custom colors include white, red, black, yellow, and gray.

Can I install the new 2 blade composite propeller on my Cessna 150/152, Diamond DA-20, etc.

Our composite propellers are not FAA certified; therefore they cannot be installed on certified aircraft.

Will you make a custom propeller for me?

With 75+ years and over 500 propeller designs, we more than likely have a propeller that will work for your application. Of course if your application requires a custom designed propeller you are more than welcome to contact our sales people and discuss this with us.

What is the difference between the Rotax 2 blade and 3 blade composite propellers and is the 3 blade prop worth the additional cost?

The Rotax 2 blade propeller was the first composite aircraft design. Later, customers expressed interest in a 3 blade propeller for the aesthetics and perceived smoothness. After an extensive design and testing period, we have produced a propeller with: no loss in cruise speed, better take-off and climb, reduced noise, 1 lb weight savings, and a new pitch system with greater accuracy.