Reliable Service since 1978

Doing our part to help keep our thriving General Aviation community wheels up and flying safely.

Certifications Services Warranty Resources

Licenses & Certificates


Welcome to the online home of Certified Engines Unlimited, Inc. If this is your first time interacting with our company, we do appreciate your interest. If you’re one of our loyal, long-time customers or vendors looking for a copy of a certificate or directions to our facility, we think you’ll easily find it here.  We encourage you to give us a call if you’re having trouble finding what you are looking for.

Our philosophy is simple.
We listen to our customers.
We provide quality products.
We stand behind our work.

Anyone can sell you a part. Not everyone does it quite like we do.

Go ask around… you can start with some of our best partners below.

News/Blog Articles

Client Testimonials

“We have used Allen to rebuild / supply factory new engines since 1979. Great customer support.”

- Customer on, 2016

“Have known Allen Weiss for 20+ years. Good guy and good operation. Recommend them without reservation.”

- Customer on, 2016