Please Help!? motor stalls

MSD coil interesting

Thank You so far for all the input. Here is a little more info. Last fall all fluids and filters where changed,new cap, rotor, plugs,wires and coil. The distributor is a prestolite with the prestolite electronic module and no ballast resistor per prestolite.
The motor would stall at any speed or rpm and was running at a cool 150 degrees. I also spoke with Vince at SKIDIM, very knowlagable individual, and after a little conversation I had mentioned that one of the things I had done this fall was to replace the coil with a MSD Blaster II he immediately said that was my problem. Apparantly Prestolite modules do not like high voltage coils. So needless to say I have one ordered along with a new module,may have been damaged, its 10 years old or just want a spare. I will have the boat back in the water this weekend to test and will post result so someone else wont make this mistake. Thank You again for your advice.

79N...:

Not so obvious, as his symptoms are smiliar to one my boat suffered when sucking air into the fuel line at a bad hose clamp. The fuel bowls would run dry and engine would die. It immediately restarted. However, it would run endlessly at low rpms...just nothing over 2000. A larger air leak or fuel restriction could result in worse drivability. Cut Jim some slack as his diagnosis is plausible in my book.

79A...:
My advice is to replace coil, ballast resister, condensor, fuel pump and fuel filter then give it a test run. All parts are cheap and you may never know the root cause, but at least you will be on the water again having fun with piece of mind that you have new and good components. If you want to go cheaper and the boat stalls at any load level, then change parts one at a time until symptom goes away. Jump across ballast resister to eliminate it. Pump fuel into a container to eliminate the fuel pump, filter, sucking air. Replace the coil and condensor.

If it was fuel it would not start without cranking to get fuel back up in the carb. If it feels like someone just turned the key off its probably ignition.

Maybe the little piece of junk resistor under the plate on the back of the motor is in need of replacement. It is under the plate that holds the starter relay and voltage regulator. The resistor protects the points in your ignition system. An old resistor will break down under heat over time and cause the boat to do exactly what you are describing.

Did you fill the tank after winterization and add fuel stabilizer?