The governor hole once the governor has been removed is a common place to attach a pulse fitting for the fuel pump. If you plan to use the stock carburetor you have a few other options for the pulse source. This provides a clean pulse source where you do not have to worry about oil getting in the line. This adapter is used with the 22mm Mikuni. The best option would be to use our carburetor adaptor with the pulse fitting (12372). When it comes to the pulse line you have several options. In the picture above the engines side cover was used as the source of the pulse to run the fuel pump. A pulse fitting is nothing more than a brass fitting you can find in your home improvement store's plumbing department. We drilled and tapped a hole in the engine side cover and installed a pulse fitting. The fuel line in the center is the pulse line that runs the fuel pump. The fuel line on the left is coming out of the outlet and going into the carburetor. The fuel line on the right is coming from the gas tank and going into the inlet on the fuel pump. Once the pump is mounted you have three lines to hook up. The fuel pump pictured has been mounted on the fan shroud. One thing you want to keep in mind is the fuel pump should be as close as possible to the source of the pulse which runs the pump. There are many different locations to mount the fuel pump. Our Mikuni fuel pump is simple, easy to install and operates off the the pulse created by the engine. When it comes to serious OHV 4 cycle engines, you need to ditch your gravity feed setup and install a fuel pump.
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