lowerunit bp run hot

[cvp240]

my 2.4 bp has a 2 hole lowerunit on it runs hot at upper rpms can it be drilled uot or can i add more holes to it tankkkkkksss

[Dave S]

Check the gaskets under the water pump plate, sometimes they blow out. That would let the water bypassthe pump, not getting pressure. Or you could just switch lowers with WATERWINGS :D

[us1]

A good two-hole unit will run nice and cool. Put a light up one of the holes. On some units Mercury drill them incorrectly and the two holes intersect before they get to the 1/2-inch passage. This only leaves a tiny hole for the water to get through. I have seen a few like this.