I bought it brand new in 2016. Had it almost a year now and have just over 100 hours on it. Question is, since day one it has always taken me 10-20 pulls to start it. Unless it's still warm from running it. Is this normal?

Another is almost every time I start it, it leaves a black suit in the water. If I romp on it a little in neutral it puts out a lot.
Just did my service 2 weeks ago and nothing has changed. Thought it could be spark plug? Didn't expect this for with a motor 2 years old

Any opinions would be great.