What is the EC 993 Billet Pulse Fitting?
The EC 993 Billet Pulse Fitting is a billet aluminum fitting designed to provide a pulse connection for an external fuel pump on compatible small-block racing engines.
On compatible EC billet side covers, it can also be used as part of a crankcase-to-valve-cover ventilation system.
What engines does the EC 993 pulse fitting fit?
The EC 993 is designed for compatible side covers used on Honda GX200-style engines, including:
- Predator Ghost 212
- Wildcat 240
- Honda GX200
- 196cc Clone engines
- Other compatible Clone-based racing engines
Fitment depends on the side cover and port configuration rather than the engine model alone.
Does the EC 993 fit the Predator Ghost 212?
Yes, the EC 993 is designed to fit compatible Predator Ghost 212 side covers that have the appropriate pulse/oil fill port.
Verify the side cover port and thread configuration before ordering.
Does the EC 993 fit the Wildcat 240?
Yes, the fitting is designed for compatible Wildcat 240 cast side covers with the top oil fill/pulse fitting location.
Because side cover designs can vary, verify your side cover before ordering.
Does the EC 993 fit an EC billet side cover?
Yes. The EC 993 is designed specifically for use with compatible EC billet side covers.
It can be used as a pulse fitting for an external fuel pump or, depending on the side cover configuration, as part of a crankcase ventilation system.
What is a pulse fitting used for?
A pulse fitting provides access to the pressure pulses created inside the engine crankcase.
A pulse-style external fuel pump uses these pressure and vacuum pulses to operate the pump and move fuel from the fuel tank to the carburetor.
Can I use the EC 993 with an external fuel pump?
Yes. The EC 993 is designed to provide a pulse connection for compatible external pulse-operated fuel pumps.
Connect the appropriate pulse line from the fitting to the fuel pump according to the fuel pump manufacturer's installation requirements.
Why would I need an external fuel pump on a Clone engine?
An external fuel pump can be useful when the engine requires more consistent fuel delivery than a gravity-fed system provides or when the fuel tank and carburetor are positioned in a way that makes gravity feed impractical.
External fuel pumps are commonly used on:
- Racing karts
- Performance Clone engines
- Predator Ghost engines
- Wildcat engines
- Mini bikes
- Custom fuel systems
Can the EC 993 be used as a crankcase breather?
Yes, on compatible EC billet side covers, the fitting can be used as part of a crankcase ventilation system.
One possible configuration routes crankcase vapors from the side cover to the valve cover, providing an additional controlled ventilation path.
Can I connect the EC 993 directly to the valve cover?
On an appropriate EC side cover and engine configuration, the fitting can be used to connect the crankcase to a valve-cover vent system.
The complete ventilation system should be designed to properly manage crankcase pressure and oil vapor.
Is the EC 993 a fuel fitting?
No. The EC 993 is primarily a pulse fitting.
It is designed to transmit crankcase pressure pulses to an external pulse fuel pump or to provide a crankcase ventilation connection in compatible applications.
It is not intended to be used as the primary fuel inlet or fuel outlet fitting.
Is the EC 993 made from billet aluminum?
Yes. The fitting is precision-machined from billet aluminum.
Is the EC 993 hard anodized?
Yes. The fitting receives a hard-anodized finish designed to improve resistance to fuel and oil and increase surface durability.
Why is the fitting hard anodized?
Hard anodizing provides additional protection when the fitting is exposed to fuel, oil, and the repeated heat cycles common in racing engines.
It also helps reduce thread galling and seizing when the fitting is installed into aluminum cast or billet side covers.
Why is thread galling a concern with aluminum fittings?
Aluminum threads can gall when two aluminum components are repeatedly installed and removed, particularly when exposed to heat and friction.
The hard-anodized surface helps reduce this tendency and improves the durability of the fitting's threads.
Does the EC 993 fit all Honda GX200 Clone side covers?
No. The EC 993 is not a universal fitting for every GX200 or Clone side cover. It is designed for specific compatible side covers, including EC billet side covers and select Ghost 212 and Wildcat 240 side covers. Always verify the side cover port and thread configuration.
Does the EC 993 fit a Predator 212?
It can fit compatible Predator Ghost 212 side covers with the appropriate pulse/oil fill port. The fitting should not be assumed to fit every Predator 212 side cover.
Does the EC 993 fit a standard Predator 212 side cover?
Fitment depends on the specific side cover. The EC 993 is primarily intended for compatible Ghost 212, Wildcat 240, and EC billet side covers with the appropriate port. Verify the side cover before ordering.
Can I use the EC 993 on a 196cc Clone engine?
Yes, if the 196cc Clone is equipped with a compatible side cover designed to accept the fitting. The fitting is commonly applicable to GX200/196cc Clone racing applications using an appropriate EC or compatible side cover.
Can the EC 993 be used on a Tillotson engine?
It may be used on a compatible Tillotson engine if the engine has a side cover with the appropriate port and thread configuration.
Verify the specific engine and side cover before ordering.
Does the EC 993 increase engine horsepower?
No. The fitting itself does not increase horsepower. Its purpose is to provide a properly configured pulse connection for an external fuel pump or crankcase ventilation connection.
What type of fuel pump can I use with the EC 993?
Use a compatible pulse-operated external fuel pump designed to operate from crankcase pressure pulses.
Where should the pulse line be connected?
The pulse line should connect between the EC 993 fitting and the designated pulse port on the external fuel pump. Keep the pulse line as short and direct as practical and follow the fuel pump manufacturer's installation recommendations.
Can the EC 993 be used with a vacuum-operated fuel pump?
Only if the pump is specifically designed to operate from the type of crankcase pressure pulses provided by the engine.
Verify compatibility with the pump manufacturer before installation.
What should I use to seal the fitting threads?
Use a sealant appropriate for the fitting material, engine temperature, and intended application.
Avoid excessive thread sealant that could enter the crankcase or restrict the pulse passage.
How tight should the fitting be?
Install the fitting securely without over-tightening it. Because the fitting installs into an aluminum side cover, excessive torque can damage the side cover threads.
Can the EC 993 be removed and reused?
Yes, provided the fitting and threads remain in good condition. Inspect the fitting and side cover threads whenever the fitting is removed, particularly on racing engines that are frequently serviced.
What is included with the EC 993?
The product includes:
1 × EC 993 Billet Pulse Fitting
The side cover, pulse line, fuel pump, valve cover, and other components are not included.
What should I verify before ordering?
Verify:
- Your engine model
- Side cover manufacturer
- Side cover port location
- Thread compatibility
- Intended application
- External fuel pump requirements, if applicable
The EC 993 is designed for specific side cover applications and should not be assumed to fit every GX200 or Clone engine.
