I have a 1989 150HP Evinrude V6. It's been very hard to start, but once it starts and runs for 5-10 minutes it's fine to start back up after fishing for a couple of hours.<br /><br />I thought for awile that I was flooding it. Would prime the ball until hard, would not fire. After 5-15 minutes usually would fire up, I figured the 5-15 minutes of trying burnt off the gas and it would no longer be flooded and it would start. Guess again. Tried starting with minimal priming and same thing. I went out yesterday and it wouldn't fire at all. Tried it with no choke and it back fired a couple of times, but would not catch.<br /><br />This is a new boat to me and this has happened all 3-4 times I've had it out. It's not the battery as I just bought a new deep crank and hooked it up before I went out yesterday.<br /><br />I want to get some advice before I take it in to the shop. May save me some cash and give me a starting point. Could it be as easy as changing out the plugs? If so, what plugs do I need?<br /><br />Please help, this is a first boat and it's really getting discouraging fishing with only the trolling motor.