91893 – Champion Aerospace Abrasive Compound 15 oz Bag
Available now on the Airparts.aero Marketplace.
Overview
The Champion Aerospace 91893 is a genuine OEM, specialized abrasive compound, engineered specifically for use in aviation spark plug cleaning machines (such as the Champion CT-475). This is not a generic sandblasting media; it is a precisely graded abrasive grit designed to effectively remove lead, carbon, and other combustion deposits from spark plug electrodes and insulators without causing damage. Packaged in a convenient 15-ounce bag, the 91893 compound is essential for any A&P mechanic or maintenance facility that performs routine cleaning and servicing of aviation spark plugs.
Key Features
- Optimized Abrasive Grit: Composed of a specific type and size of abrasive grit (typically a sharp, fast-cutting aluminum oxide). The particle size is carefully controlled to be aggressive enough to remove hard lead deposits, yet fine enough to avoid eroding the base metal of the electrodes or damaging the delicate ceramic insulator.
- Prevents Insulator Damage: Using the correct, specified abrasive is critical for preventing damage to the spark plug's core nose insulator. Incorrect or contaminated abrasives can leave conductive residues on the insulator, leading to misfiring, or can be overly aggressive and physically crack the ceramic.
- Restores Spark Plug Performance: When used correctly in an abrasive blast cleaner, this compound thoroughly cleans the firing end of the spark plug, restoring its ability to produce a strong, consistent spark and ensuring reliable engine performance.
- Convenient Packaging: The 15-ounce bag provides the correct quantity of fresh abrasive for servicing and replenishing a standard aircraft spark plug cleaner, ensuring the media remains clean and effective.
- Genuine Champion OEM Product: As a genuine compound from the leader in aviation ignition, it guarantees the correct material composition and particle size distribution required for the safe and effective cleaning of their spark plugs.
Technical Specifications
- Part Number: 91893
- Component Type: Spark Plug Cleaner Abrasive Compound
- Material: Specifically Graded Abrasive Grit (e.g., Aluminum Oxide)
- Package Size: 15 ounces
- Primary Application: For use in aviation spark plug abrasive blast cleaning machines.
- Associated Equipment: Champion CT-475 Cleaner/Tester
- Certification: Conforms to original Champion Aerospace specifications.
Aircraft Compatibility
The 91893 abrasive compound is a universal shop supply for the maintenance of massive electrode and fine wire aviation spark plugs used on virtually all piston-engine aircraft.
- Common Engine Platforms:
- Lycoming
- Continental
- Common Aircraft Platforms:
- Textron Aviation (Cessna & Beechcraft)
- Piper
- Cirrus
- Mooney
- And all other aircraft with piston engines.
Applications
The 91893 is an essential consumable for routine aircraft engine maintenance:
- Spark Plug Cleaning: The primary media used in the abrasive blast portion of a 100-hour or annual inspection spark plug service.
- Deposit Removal: Effectively removes the stubborn, hard metallic lead deposits (from 100LL Avgas) and soft, black carbon deposits from the spark plug's firing well.
Why Choose 91893?
Properly cleaning a spark plug is a critical step in ensuring a reliable ignition system. The Champion 91893 is the only abrasive compound engineered and approved by the spark plug manufacturer for this specific task. Using generic blasting media from a hardware store can be catastrophic; the wrong grit size can erode the electrodes, and, more dangerously, contaminants in the media (like silicone) can fuse to the insulator, creating a conductive path that will cause the spark plug to misfire under pressure. For a safe and airworthy spark plug service, trust only the OEM-specified abrasive.
Order Your Champion 91893 Abrasive Compound Now
Ensure your spark plug servicing is done to certified standards with the genuine OEM abrasive compound. Visit Airparts.aero to order your Champion 91893 today.
The process of cleaning a spark plug with the 91893 abrasive involves using a machine that directs a high-velocity stream of air and abrasive particles into the firing end of the spark plug. The sharp-edged abrasive particles act like microscopic chisels, chipping away the hard lead and carbon deposits from the center electrode, ground electrode, and, most importantly, the core nose insulator. A clean insulator is critical because it must provide a path of extremely high electrical resistance. Any conductive deposits on its surface will allow the high-voltage spark to "flash over," shorting to ground across the insulator surface instead of jumping the electrode gap, resulting in a misfire, especially at high altitudes and power settings where cylinder pressures are greatest.
Note: This is a professional maintenance supply. It must be used in a dedicated aviation spark plug cleaning machine in accordance with the manufacturer's instructions. After abrasive cleaning, the spark plug must be thoroughly blown out with clean, dry air to remove all residual abrasive particles. The spark plug's internal resistance and electrode gap must be checked after cleaning and before returning to service.