So I've noticed when I start my 4s (15hrs) while it's trimmed down it smokes a pretty good amount just at start up. Yesterday I got on a run and gun sort of pattern, and was hopping from spot to spot; I noticed the blue smoke several times while doing this. I never see this if I have motor trimmed up so thinking it's caused by trim position. So...
1. Is this normal?
2. Is it the back pressure from the exhaust port being in water, or the angle of the powerhead?
3. Is it cause for concern?
Thanks...Mick