I have a 1988 Evinrude 150 VRO. The owners manual that states that the
fuel line to the engine is 3/8" ID, but does not say anything about the
lines inside the engine cover. I believe the in-line fuel filter and
lines up to the fuel pump are supposed to be 5/16" ID, but do not know
for sure. Many different hands have worked on this engine over the
years, so I was wondering if any Evinrude/Johnson experts out there
would know for sure the proper ID lines inside the cowling.

Thanks, HHatch