I have an aluminum boat with a 1981 Mariner 40hp outboard and it usually take about 3-4 minutes to start the engine first thing in the morning. Once it starts, it runs great (like it can even pull a skier behiind it) and I can turn the motor off, fish about 4 hours and with a light twist can turn the motor back on. Does anyone know why it takes so long for me to start the motor first thing in the morning? I am thinking about replace the carburator. Is that nesessary and how much you think it will cost? Thanks for any advice.