Good day, any expert or anyone who had experienced this issue and was able to resolved kindly help.

first thing is that all filters/change oil has already been done. now my concern is that pag nagbelow 1/2 na ung gas indicator(FLOAT is working properly) my tendency na namamatay ung makina na parang walang arankada. that time nung namatay sakto may Gasoline Station so naidala ko. Nung binuksan ung hood napansin nga namin na naka stuck sa ilalim ung pump which is i dont know kung ganun nga dapat so ang ginawa ni kuya is inangat nya tapos un umandar ulit. now pag namamatay ung sasakyan ganun nga ginagawa ko manually ko tinataas para umandar. for now i don't want to go to a mechanic na to have it repaired baka lumala, i just want to have an idea kung ano ba dapat ipatingin. regarding tank kung madumi, nung pinalitan kasi ung float tapos drinain ung diesel, medyo konting mumu lng naman which is di ganun kadumi kasi malinaw parin ung diesel. any advise will be appreciated. thanks katsikot.