6.2 MX MPI - Mercruiser Dies Under Load

Dark5OH

Recruit
Joined
Jul 1, 2020
Messages
2
Our 2008 Hurricane Sundeck 2400 with a 6.2L Mercruiser equipped with a Whipple Supercharger is having some issues.

The boat will idle mostly fine and will rev up when running on the garden hose. When the boat is in the water it will idle fine but as soon as any load is put on the engine it will sputter and die.

We bought a diagnostic program to read the codes but it is only showing 1 code - saying the boat engine alarm is not working.

Also, while graphing the Spark Advance at idle is is jumping all around the place (from -7 to 23)


Any help or suggestions are welcomed.
 
Last edited:

QBhoy

Fleet Admiral
Joined
Mar 10, 2016
Messages
8,348
Has the ecu been adjusted to suit the charger ? I’m not sure the mpi will be set up well standard to suit a charger bolt on without it.
 
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