the water injection system is above the waterline. Notice that the water
injection system is not shown in the line drawing, but that the aft end of the
manifold is _at_ the waterline. The exhaust makes a 90* turn up from there,
rises to 6 inches or more, then the injection system is installed and the water
falls downward. The water injection opens into an area above the waterline.

Notice also that no anti-siphon valve, and tubing from/to, is shown in the line
drawing as well.




http://www.sailingsource.com/pearson30/images/brocb.jpg

See above. Pearson engine is below the waterline. Only part of the throttle
assembly was above.

RB