Re: 50 hp force hard warm starts.
Very common problem. The engine is flooding.<br />The diaphram in the fuel pump is leaking/torn/perforated/ has a hole, etc. Seems these things fail atfter about 10 years of use.<br /><br />When the engine is warm, pump is full, fuel leaks thru the diaphram and the back of the pump and into the crankcase, which floods out the motor.<br /><br />You will have to look at your motor and see if you have the newer square style fuel pump, or the older round style. <br /><br />Get the Mercury diapham kit, I like them because they come with instructions. Easy to install.<br /><br /><br />You can pick one up at your local Mercury dealer for about $10.