Hi, I just recently purchased a Mercury 75 (7.5hp) outboard motor from one of my dad's friends. It has been setting on a flat bottom for about a year or so now and when I fired it up it didn't pump water very well. So I replaced the impeller and now it pumps fine. We also had to replace the gas line on the inside of the motor because it was leaking. Now when I run it, it takes more than it should to get it started and refuses to idle. I'm thinking I need to replace the spark plug among other things. So could anyone tell me what kind of spark plug I need? The serial number is 2634501 and the front has a shiny part that says "lightning ignition". Also I read that I might have something wrong with my fuel pump diaphragm. Should I try to replace this too? if so where can I get the parts I need? thanks!
