638225 - Continental Motors OEM Engine Mount Bushing

638225 – Continental Motors OEM Engine Mount Bushing

Available now on the Airparts.aero Marketplace.

Overview

The Continental 638225 is a genuine OEM engine mount bushing, a flight-critical elastomeric shock mount designed for a wide range of Continental's most popular 6-cylinder engines. This is the core component of the engine's vibration isolation system, precision-molded from a high-quality, high-damping rubber compound. It is specifically engineered to absorb and dissipate the torsional and high-frequency vibrations produced by the engine, preventing them from being transmitted to the airframe. The integrity of these bushings is essential for protecting the airframe from fatigue, enhancing pilot and passenger comfort, and ensuring the longevity of sensitive avionics.

Key Features

• Tuned Vibration Damping: Fabricated from a proprietary elastomeric compound with a specific durometer (hardness) and damping coefficient. This "tunes" the mount to effectively absorb the specific vibrational frequencies produced by Continental 360, 520, and 550-series engines.
• High-Damping Elastomer: The specialized rubber compound is engineered for a long service life, with excellent resistance to degradation from heat, engine oil, and atmospheric ozone.
• Maintains Drivetrain Alignment: While flexible enough to absorb vibrations, it is stiff enough to hold the engine securely in place, maintaining the critical alignment between the engine and the propeller shaft under all G-loads and torque conditions.
• Reduces Airframe Fatigue: By isolating the engine's vibrations, the shock mount system significantly reduces the cyclical stress on the engine mount structure, firewall, and surrounding airframe components, preventing fatigue cracking.
• Genuine Continental OEM Part: As a genuine factory component, it guarantees conformance to the stringent material and performance specifications required by the original aircraft Type Certificate. This is the only way to ensure the vibration isolation system performs as designed.

Technical Specifications

• Part Number: 638225
• Component Type: Engine Shock Mount Elastomeric Bushing
• Material: High-Damping, Oil-Resistant Synthetic Rubber (Elastomer)
• Primary Function: Vibration isolation and damping for the engine.
• Associated Parts: Used in conjunction with various engine mount brackets, bolts, and washers.
• Certification: FAA Production Approval

Aircraft Compatibility

The Continental 638225 is the standard shock mount bushing for the assemblies on a vast number of aircraft powered by Continental's mid- and large-bore piston engines. It is imperative to consult the specific aircraft and engine parts catalogs for final verification.

• Common Continental Engine Series:
  • IO-360, TSIO-360
  • IO-520, TSIO-520
  • IO-550, TSIO-550
• Common Aircraft Platforms:
  • Cessna: 182, 206, 207, 210, 310, 337
  • Beechcraft: Bonanza, Baron
  • Mooney: M20 series (with Continental engines)

Applications

The 638225 is a flight-critical component for engine installation and maintenance:

• Engine Mount Assembly: The central component of the shock mount system that provides the actual vibration isolation.
• Engine & Mount Overhaul: A mandatory replacement item during every engine change or mount overhaul. The rubber's properties degrade over time, and new mounts are essential to restore proper performance.
• Troubleshooting Vibration Issues: Replacing old, hardened, or "sacked" engine mounts is the primary solution for resolving increasing levels of airframe vibration.

Why Choose 638225?

The long-term health of your airframe and avionics is directly impacted by the performance of your engine shock mounts. A hardened or degraded 638225 bushing will transmit damaging vibrations directly to the rest of the aircraft, leading to cracked engine baffles, instrument failures, and airframe fatigue. Using a genuine Continental OEM part is the only way to ensure the bushing has the correct stiffness and damping properties that were specifically engineered for your engine and airframe combination. For a smooth flight and a healthy airframe, there is no substitute for genuine, factory-certified shock mounts.

Order Your Continental 638225 Engine Mount Bushings Now

Restore the smooth, quiet comfort of your aircraft and protect your airframe from damaging vibration. Visit Airparts.aero to order your genuine Continental 638225 engine mount bushings today.

The 638225 bushing functions as a key element in a "tuned-mass-damper" system. The engine represents the "mass," and the elastomeric 638225 bushing acts as both the "spring" and the "damper." Its specific stiffness (spring rate) is designed to create a system with a natural resonant frequency that is much lower than the engine's primary operating frequencies (e.g., the firing frequency of the cylinders). This ensures that the engine's vibrations are effectively isolated rather than amplified. The material's internal damping properties (hysteresis) dissipate vibrational energy as a small amount of heat, preventing uncontrolled oscillations. This is why replacing all mounts as a matched set with genuine 638225 bushings is critical to ensure the entire system is correctly "tuned."

Note: This is a flight-critical component. Engine mounts should always be replaced as a complete set to ensure uniform performance and prevent uneven loading. Installation must be performed by a certified A&P mechanic in accordance with the current aircraft maintenance manual. The engine mount hardware stack-up must be assembled in the correct order and torqued to the specified value.