My 1976/evinrude 25 hp didn't start last time out on the water. It had spark but wasn't getting fuel to the carb. I suspected it was the fuel pump and replaced it. But the problem continues. No fuel to carb. I'm thinking somethings clogged in the lines or carb itself. Is a carb rebuild something I can tackle myself or are there special adjustments that only the pros can do. I am mechanically inclined, but don't want to take it apart if I can't fix it. Also need new fuel lines and am thinking clear lines. Any pointers would be much appreciated.