My 1995 225 Evinrude (don't have serial # right now) is real hard to start after sitting a few weeks. After checking everything and pulling a hose from the back of the carb to check the enricher it seemed like the gas coming out was really oily. Much more than the 50:1 premix I have in a gas can.
I found that squirting some of that premix into the carbs will start it right up.
I've heard of VRO pumps failing, but can they go bad by not mixing the right oil to gas too?