I just picked up a 1998 mercury 15hp 4-stroke tiller short shaft with 10 hours of use from my grandpa after he passed away recently. he left me with this motor. I'm excited to use it but when I primed the bulb and all of sudden a gas leaking out of the carburator near the fuel line but the fuel line looks brands new and no cracks. what it will be? Leaky carburator?? the motor looks brand new "1998" 15hp mercury 4-stroke tiller short shaft and i want to fix it myself so I can get the motor running on the water. thanks.