1. Introduction and Overview
This instruction manual provides essential information for the safe and effective installation, operation, and maintenance of your new ProPart Fuel Primer Bulb. This product is a high-quality aftermarket replacement specifically designed for Generac equipment requiring part number 0J95780137. The primer bulb plays a crucial role in your engine's starting process by drawing fuel from the tank into the carburetor, ensuring a quick and reliable start.
Please read this manual thoroughly before attempting any installation or maintenance to ensure proper function and to prevent damage to your equipment.
2. Product Features and Compatibility
- Direct Replacement: Engineered to replace Generac Part # 0J95780137.
- High Quality: Manufactured to meet or exceed OEM standards for durability and performance.
- Reliable Starting: Ensures proper fuel delivery to the carburetor for consistent engine priming.
This primer bulb is compatible with various Generac models that utilize the specified part number. Always verify the part number on your existing primer bulb or in your equipment's manual to ensure correct fitment.

Image: Four ProPart Fuel Primer Bulbs, showing the product in its packaging and individually.
3. Installation Instructions
Safety First: Before beginning any installation, ensure your equipment is turned off, cooled down, and disconnected from any power source (e.g., spark plug wire removed). Wear appropriate safety gear, including gloves and eye protection.
- Locate the Primer Bulb: Identify the existing primer bulb on your Generac equipment. It is typically located on the carburetor or air filter housing.
- Disconnect Fuel Lines: Carefully disconnect the fuel lines attached to the primer bulb. Use pliers if necessary to loosen clamps. Be prepared for a small amount of fuel to spill; have a rag ready.
- Remove Old Primer Bulb: Gently pry out the old primer bulb from its housing. It may be held in place by a snap-in mechanism or a retaining ring.
- Install New Primer Bulb: Insert the new ProPart primer bulb into the housing, ensuring it snaps securely into place.
- Reconnect Fuel Lines: Reattach the fuel lines to the new primer bulb. Ensure they are securely connected and free from kinks. Refer to your equipment's service manual for the correct fuel line routing if unsure.
- Test for Leaks: After installation, prime the engine several times and check for any fuel leaks around the new bulb and connections.
Installation Video Guides:
Video: General guide on how to replace a snap-in fuel primer bulb in small engines. This video demonstrates the process of removing and installing a primer bulb, which can be applied to various small engine types, including those found in Generac equipment.
Video: A demonstration of replacing a 188-512 snap-in primer bulb for 2-cycle small engines. This video provides visual steps for the replacement process, which is similar for many primer bulb types.
4. Operating Instructions
The primer bulb is used to manually draw fuel into the carburetor before starting a cold engine. This action helps to reduce the number of pulls required to start the engine.
- Cold Start: Before attempting to start a cold engine, press the primer bulb several times (typically 3-5 times, or as recommended by your equipment's manual) until you see fuel flowing into the bulb or the bulb feels firm.
- Avoid Over-Priming: Do not press the primer bulb excessively, as this can flood the engine and make it harder to start.
- Warm Start: For a warm engine, priming is usually not necessary.
5. Maintenance
Regular inspection of your primer bulb can prevent starting issues and ensure optimal engine performance.
- Visual Inspection: Periodically check the primer bulb for any signs of cracking, hardening, or discoloration. A damaged bulb may not effectively draw fuel.
- Check for Leaks: Inspect around the base of the primer bulb and its fuel line connections for any fuel leaks. Even small leaks can affect engine performance and pose a fire hazard.
- Replacement: If the primer bulb shows signs of wear, damage, or is not functioning correctly (e.g., not drawing fuel, not returning to its original shape), it should be replaced immediately.
6. Troubleshooting
If you experience issues with your engine's starting, the primer bulb could be a contributing factor. Here are some common problems and solutions:
- Engine Not Starting/Hard to Start:
- Primer bulb not drawing fuel: Check for clogged fuel lines, a faulty primer bulb, or issues with the carburetor. Replace the primer bulb if it's cracked or stiff.
- Engine flooded: If you've over-primed, wait a few minutes for excess fuel to evaporate, then try starting without priming.
- Fuel Leaks Around Primer Bulb:
- Cracked or damaged bulb: Replace the primer bulb.
- Loose fuel line connections: Ensure fuel lines are securely attached and clamps are tight.
If troubleshooting these steps does not resolve the issue, consult your equipment's service manual or contact a qualified service technician.
7. Specifications
| Specification | Detail |
|---|---|
| Product Type | Fuel Primer Bulb |
| Brand | ProPart |
| Replacement For | Generac Part # 0J95780137 |
| Package Dimensions | 2.2 x 1.81 x 0.98 inches |
| Item Weight | 0.634 ounces |
| Manufacturer | CTS |
8. Warranty and Support
This ProPart Fuel Primer Bulb comes with a 3-Month Hassle-Free Return policy. For any questions regarding installation, compatibility, or product performance, please contact your retailer or the manufacturer directly. Always refer to your specific Generac equipment's owner's manual for detailed service and maintenance schedules.