Introduction
The OEMTOOLS 25341 17 Mini-Blade Ignition Feeler Gauge is a precision tool designed for accurate measurement of point gaps in older ignition systems and other tight spaces. This manual provides essential information for the proper use, care, and maintenance of your feeler gauge.
Safety Information
- Always wear appropriate personal protective equipment, such as safety glasses, when working on automotive systems.
- Ensure the ignition system is off and cooled down before attempting any measurements.
- Handle the blades with care to avoid injury. The edges, while not razor-sharp, can cause minor cuts if mishandled.
- Keep the tool clean and free of grease or oil to maintain accuracy and prevent slippage.
- Store the feeler gauge in a dry place to prevent rust and corrosion.
Product Overview
The OEMTOOLS 25341 Mini-Blade Ignition Feeler Gauge consists of 17 individual blades, each precisely ground and laser-etched with both inch and millimeter measurements. These blades are housed within a compact metal casing, secured by a pivot screw, allowing them to fan out for selection. A thumb notch is integrated into the design for easy blade access and secure storage.
Figure 1: The OEMTOOLS 25341 Mini-Blade Ignition Feeler Gauge with its 17 blades fanned out, displaying the various measurement sizes.
Figure 2: The feeler gauge in its compact, closed position, highlighting its small size for easy storage and access in tight spaces.
Setup
The OEMTOOLS 25341 Mini-Blade Ignition Feeler Gauge requires minimal setup. It comes pre-assembled and ready for use.
- Unpack: Carefully remove the feeler gauge from its packaging.
- Inspect: Before first use, inspect all 17 blades for any signs of damage, bending, or corrosion. Ensure the pivot screw is secure but allows for smooth fanning of the blades.
- Familiarize: Fan out the blades and observe the laser-etched measurements in both inches and millimeters. Note the thumb notch designed for easy blade selection.
Operating Instructions
This feeler gauge is designed for precise gap measurement in various applications, particularly older ignition systems. Follow these steps for accurate use:
- Identify Required Measurement: Determine the specific gap measurement (in inches or millimeters) required for your application (e.g., spark plug gap, valve lash, point gap).
- Select Blade: Using the thumb notch for leverage, carefully fan out the blades and select the blade corresponding to the desired measurement.
- Verify Measurement: Double-check the laser-etched marking on the selected blade to confirm it is the correct size. The markings are clear and easy to read.
- Insert Blade: Gently insert the selected blade into the gap you wish to measure. The blade should slide in with a slight drag. If it's too loose, try a thicker blade. If it doesn't fit, try a thinner blade.
- Read Measurement: The measurement on the blade that fits with the correct drag indicates the gap size.
- Return Blade: After use, carefully fold the blade back into the casing. Ensure all blades are properly aligned before closing the gauge.
Figure 3: The integrated thumb notch facilitates easy selection and removal of individual blades from the set.
Figure 4: Laser-etched markings provide clear and precise measurements in both inches and millimeters.
The blades are made from hardened and tempered steel for durability and accuracy, ensuring reliable performance over time.
Figure 5: The blades are constructed from hardened and tempered steel for enhanced strength and longevity.
Maintenance
Proper maintenance will extend the life and accuracy of your feeler gauge:
- Cleaning: After each use, wipe down the blades with a clean, dry cloth to remove any dirt, oil, or debris. For stubborn grime, a mild degreaser can be used, followed by thorough drying.
- Lubrication: Periodically apply a very thin coat of light machine oil to the blades and the pivot point to prevent rust and ensure smooth operation. Wipe off any excess oil.
- Storage: Store the feeler gauge in its original packaging or a protective case in a dry environment to prevent moisture exposure and physical damage.
- Inspection: Regularly inspect the blades for any signs of bending, nicks, or wear that could affect accuracy. If a blade is damaged, it may need to be replaced or the entire gauge retired if accuracy cannot be guaranteed.
Troubleshooting
Feeler gauges are simple tools, and issues are rare. Most problems relate to improper use or maintenance.
| Problem | Possible Cause | Solution |
|---|---|---|
| Blades are stiff or difficult to fan out. | Lack of lubrication or accumulation of dirt/debris. | Clean the pivot area and apply a small amount of light machine oil. |
| Blades show signs of rust. | Exposure to moisture or improper storage. | Clean off rust with a fine abrasive (if minor) and apply oil. Store in a dry place. Severe rust may require replacement. |
| Inaccurate measurements. | Damaged, bent, or worn blades; incorrect technique. | Inspect blades for damage. Ensure proper insertion technique (slight drag). If blades are worn, replace the gauge. |
Specifications
- Model: 25341
- Number of Blades: 17
- Blade Dimensions: 1-3/4 inches (length) x 1/4 inch (width)
- Measurement Range (Inch): 0.010 inch to 0.035 inch
- Measurement Range (Metric): 0.254 mm to 0.889 mm
- Material: Hardened and Tempered Steel (Blades), Metal (Overall)
- Product Dimensions: 6.5"L x 3"W (overall, likely packaged)
- Item Thickness: 0.4 Inches (overall)
- Item Weight: 0.05 Pounds / 0.8 ounces
- UPC: 076812253415
Figure 6: Detailed measurement chart for each of the 17 blades, showing both inch and millimeter equivalents.
Warranty and Support
This OEMTOOLS product is manufactured by Great Neck. For specific warranty information and customer support, please refer to the packaging or visit the official Great Neck website. Keep your purchase receipt as proof of purchase for any warranty claims.
For general inquiries or assistance with your feeler gauge, please contact Great Neck customer service.