Well my restored 55 johnson is starting to give me trouble. it fires up cold on the first or 2nd pull. then after i shut it off, even if its 2 hours later , it hates to start back up. doesnt even sound like it want to but after about 15 or 20 pulls once it makes a sound like it wants to go, it fires up in about 3 or 4 more pulls. i bought new plugs, gonna replace this week. old ones didnt see bad to me tho. i got some cleaning oil and ethenal treatment for the gas(20-1) mix running in it. the original gas tank has 2 lines, fuel and air and once its pressureized in the summer, the lines are always cracking where they go over the nipples. should i get a pressure relief valve? Does it sound like its flooding? i know without being there its hard to diagnose online, but does anything stand out as a possible problem to anyone?