Tachometer pole settings:
TLDI: All models: 4-pole setting
4-Strokes:
8/9.8hp: 6 pole setting
9.9hp to 30hp: 12 pole setting
40hp to 250 hp : 4 pole setting
2-Strokes:
up to 40C: 4 pole setting
40D~90A: 6 pole setting
115~140: 12 pole setting
I have never had any luck with seafoam, which is basically just mineral spirits. Yes, set idle speed correctly, then ajjust mixture, then readjust idle speed. repeat a few times, then set mixture about 1/8 turn richer for stability.
You need an RC box, throttle and shift cables, the SRC kit, and the hook plate and drag link. No real kits. I would suggest you get help from an outboard guy.