Installing a cowl on an RC airplane doesn’t have to be frustrating. The DU-BRO E/Z Mount Cowl System offers one of the cleanest, fastest, and most secure ways to attach a cowl to your aircraft—without messy screw holes, misalignments, or cracked fiberglass. With just a few basic tools and the included hardware, you can mount your cowl in minutes while achieving a professional, vibration-isolated finish.
In this DU-BRO 101 walk-through, we break down the installation process, highlight key steps not to miss, and help you get the best possible fit on your model.
The full DU-BRO cowl mounting lineup—including EZ Mount systems, rubber isolators, and hardware—is available at DuBro.com.
What’s Included in the EZ Mount Cowl System
Inside the kit you’ll find:
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White molded plastic standoffs
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Rubber vibration-isolating washers
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Plastic paintable washers
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Angle brackets
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Hex-head screws
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Mounting screws
Before beginning, organize each part and separate the two types of screws—a critical step to ensure correct installation. DU-BRO includes hex-head screws for the exterior because they resist slipping and provide a polished, scale-like appearance.
For additional RC building tools such as hex drivers, screwdrivers, and drill bits, DU-BRO offers a full selection. TOOLS
Step-By-Step: Installing the EZ Mount Cowl
1. Gather Your Basic Tools
You’ll need a screwdriver set, hex/Allen drivers, a drill, and drill bits—simple tools most modelers already have.
2. Review the Product Card Diagram
The instruction card shows the correct stack order for the standoffs, rubber washers, and brackets. It also specifies drill-bit sizes based on the kit version (example: Cat. #998 for 20–90-size aircraft).
3. Install the Cowl Mounts to the Cowl
Decide whether you’re performing a cowl-overlap installation or a butt-joint connection. Attach the standoff assemblies to the cowl using the included screws and rubber isolators. Do not overtighten—vibration damping is part of the design.
4. Position the Cowl and Mark Mounting Points
Place the cowl onto the fuselage and use a pencil to mark the firewall locations where the brackets align. Remove the cowl and drill one hole per bracket for the first mounting screw.
5. Install Brackets to the Firewall
Remove each bracket from the cowl and install it onto the firewall using the first screw. Now, dry-fit the cowl again, adjust alignment, and drill the second hole for each bracket.
6. Install the Remaining Screws and Tighten
With both bracket holes drilled, add the second screw to each bracket. Tighten the hardware fully.
7. Attach the Cowl Using Hex Screws and Isolators
Finally, attach the cowl using:
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Hex/Allen screws
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Rubber isolators
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Nylon washers
The nylon washer is paint-ready and can be primed to match your cowl finish. It also accepts covering film if you prefer a seamless look.
For nylon washers, isolators, and other mounting accessories, DU-BRO offers compatible hardware.
A Clean, Vibration-Resistant, Professional Cowl Installation
The DU-BRO EZ Mount Cowl System is small, strong, customizable, and ideal for any aircraft—especially restorations or models where cowl alignment is critical. It minimizes stress on your fiberglass or plastic cowl, reduces vibration transfer, and gives your airplane a clean, high-quality finish that’s easy to remove for service.
For more DU-BRO mounting solutions—motor mounts, vibration isolators, and cowl hardware—visit:
DU-BRO E/Z Mount Cowl System – Adjustable, Vibration-Reducing Cowl Mounts
