The fuel line in the center
is the pulse line that runs the fuel pump. We drilled
and tapped a hole in the engine side cover and installed a pulse
fitting. A pulse fitting is nothing more than a brass
fitting you can find in your home improvement store's plumbing
department. The side cover was chosen because there is
a little pocket on the inside which helps prevent oil from getting
into the line. You can also use the govenor hole in the
top of the engine block for your pulse point. The govenor
hole wouldn't be our first choice because oil can easily get
into the line. The best place to install the pulse line
would be in one of our carburetor manifolds that has a pulse
fitting. Using the manifold for the pulse line eliminates
the possibility of oil getting into the line.
 This picture shows the
location of the pulse fitting in the side cover. This pocket area
provides some protection from oil getting into the pulse line.
Drilling and tapping the side cover is a lot of work and not everyone
owns a tap. Some of our racing buddies slip a piece of brass
tubing into the govenor hole and JB Weld the tubing in place. Then
they slip the pulse line onto the brass tubing and clamp it into place
so it doesn't leak. You are more prone to getting oil in the pulse
line, but it's a fast and effective way getting it setup. Whenever
you see oil in your pulse line, you can lift the end of the line (near
the fuel pump) and let the oil drain back into the crank case.
When using an after market carburetor with an adaptor that has a pulse
fitting in it, the oil is no longer an issue.
Performance information for your Honda GX160, GX200,
GX340, GX390, Blue OHV clone provided by AGK. |
