I moved my raw water strainer about a foot lower and so far she has started fine both times we have been sailing. But - light winds and only 5 to 10 deg heel. We will see what 15 - 20 degs does.
Just curious, what is the theory on moving the strainer down? I assume to get it below the water line on all points of sail? Seems to me that if it was full going out, it should stay full unless the intake is exposed to air.