Hi My mercury 2007 2stroke motor starts fine at home and when I first drop it in the water. I go out and run it for about n hour or so but after I stop it, the motor won’t start again ? - I’ve checked the fuel line and nothing looks wrong After getting the boat home n flushing fresh water through the motor fires straight away Any ideas here? I feel like the salt water is causing it to fail I just dunno how though or what the solution is. I can’t afford to turn the motor off whilst at sea I’ve been towed once already