Offshoreonly.com - knock sense modual for a 7.4mpi vs for a mag

Offshoreonly.com (https://www.offshoreonly.com/forums/)

- General Q & A (https://www.offshoreonly.com/forums/general-q-20/)

- - knock sense modual for a 7.4mpi vs for a mag (https://www.offshoreonly.com/forums/general-q/159157-knock-sense-modual-7-4mpi-vs-mag.html)

baronbob

05-24-2007 06:37 PM

knock sense modual for a 7.4mpi vs for a mag

I have a stock 7.4mpi knock sensor connected to two sensors on each side of my block. I am getting some spark retard in my blower application; however I have no knocking taking place. Dustin re-programed my ECU in the boat and he saw the retard on his laptop and we both observed no knocking while this was going on. I have upgraded all of my internals to forged parts and am running 5psi. Does any one know the differences between the two modules?

Pat McPherson

05-25-2007 07:24 AM

Hi Bob,
In my Volvo Penta manual they are the same. -10° if knocking.
I would imagine the electronics used would be year specific.
My Volvo Penta 310HP/7.4MPI is a 1999.

All times are GMT -5. The time now is 01:59 PM.