Hi Collectors

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I have problem i can not fix it self. The engine do not want to start, i check everythink and i see that it is no spark on the spark plugs, i exchange the spark plugs and the engine start in one second and work great .... untill i do not want to start it next day. I try to start it and ..at the beginn the engine do not work good .. i think it work on 4 cylinder only. After it was warm .. it work great ... bit next day do not want to start in all.
I remove the spark plug - the spark plug is clean and ok .. but it is WET and smell gasoline. it look like it do not work becouse of being wet with gasoline.
What it can be a reason ?? Someone know it ??
Thank You