2016 'Evinrude' 6hp sail (MFS6)

[merc200dalarna]

Picked up this rebranded Tohatsu 6hp fourstroke, branded as Evinrude, but I own one Mercury 6hp 2014 and a Tohatsu 4hp 2012, this is the same.

And the Evinrude one refuses to start, alternatively starts and runs extremely poor, it holds poor revs for max 8-10 seconds.
It even 'backfires' at times, with explosion at the prop and once even letting smoke out what I suspect is the crankcase (below pull start assembly)
(Big Poof beneath 'flywheel', I used cordless drill to start it...)
Individually I have spark, I have cleared fuel lines and the fuel filter, switched to new fuel pump, and cleaned the carb really good.

I don't have a pressure gauge.

Tomorrow I will switch the whole fuel system from my Mercury 6hp, from the inlet to fuelpump and its carburetor.

Something tells me this issue and motor stems from someone fiddling with timing belts and such (which I have never dealt with)
It's just that it seems to not want to fire at all, and when it fires on its own, it seems so 'off' and totally unresponsive.
What are the signs of a misaligned timing belt on a small motor like this?

 

[merc200dalarna]

EDIT: Might be "camshaft and rod lifters /rocker", I know even less about such.

 

[merc200dalarna]

SOLVED!

Someone mounted igniter coil upside down, I bought a perfectly working motor. 200$ bargain.

Luckily I had my mercury and tohatsu to borrow parts from, when I noticed leads going to and the spark plug wire going opposite side from my other motors.