i have a 1978 mercury 90hp 2 stroke, im having problems with it starting I think it might be the choke but im not sure, I know that when I press the choke it doesn't make that clicking sound anymore and is staying in the off position, does anyone know what it might be to fix it? it does turn over but it just wont fire up. it was running fine the other day and then it just didn't want to start today for some reason. Im really new to this motor and boat and couldn't find anything on it so im hoping someone could help me on here any advice is appreciated