I have a 1997 Sea Ray 240 Sundancer with a Mercruiser 200hp and she is a slow starter. I run the boat about 15 hours per week and it usually takes 10 to 15 muniutes to warm up. It putters and spits if I don't wait until the temp is at 170 degrees. I run the blower while we load the boat at the ramp for a good 5 to 10 minutes and then sometimes have to idle or use choke for until temp climbs to 120..Is this normal for a Mercruiser? Is there any other starting method that would help?? I unload from the trailer and then wait around 10 to 15 minutes to idle away from the ramp..Ant help is appreciated.