I have a mercury 25 hp not sure of the year. I looked up the serial number and it say a 92 but the carb has the square plastic bowl on the bottom. My question is what should the float level be set at and also the needle valve is obsolete but i was told that another motor has the same needle valve he thinks it is a 84 yamaha. Can someone tell me what level my float should be set at and also the replacement needle valve. I dont want to buy the manual because I will sell this motor as soon as it is running. Thanks in advance.