2003 350MPI Magnum Diagnostics

[homelite]

Is there a way to ck for codes and set timing, etc without the Mercuriser scan tool? I know on my Volvo 280 GSI there is bu jumping some teriminals. Is this possible on my Mercruiser?
Thanks

 

[Don S]

Re: 2003 350MPI Magnum Diagnostics

No there isn't.

You need something like this http://www.rinda.com/marine/mtspec.htm#techmate
It works on your Volvo, as well as the Mercruiser 555 ecm. Why are you trying to set timing?

 

[homelite]

Re: 2003 350MPI Magnum Diagnostics

Rats. I was hoping I could test the system with the $2.00 low voltage LED light and a jump wire like you informed me the other year on the Volvo. I take it from your answer you can't do this in the Mercruiser.

On the timing, I assumed it was adjustable and should be checked because it has a distributor. I did read the Seloc book and it doesn't address timing so maybe it's not adjustable??

Thanks,
Scott

 

[Don S]

Re: 2003 350MPI Magnum Diagnostics

That was the older MEFI systems. Merc used it too.
No, the timing is not adjustable on the new setups.

 

[achris]

Re: 2003 350MPI Magnum Diagnostics

Rats. I was hoping I could test the system with the $2.00 low voltage LED light and a jump wire like you informed me the other year on the Volvo. I take it from your answer you can't do this in the Mercruiser.

On the timing, I assumed it was adjustable and should be checked because it has a distributor. I did read the Seloc book and it doesn't address timing so maybe it's not adjustable??

Thanks,
Scott

A few things here...

The timing is adjusted by the ECM, based on signals from the crank position sensor. And that thing that looks like a distributor, it's call a High Voltage Switch... and that's all it does, just points the spark at the right hole.

But the thing that scared me the most when I read your post.... 'seloc'

Please, please get rid of that thing... burn it, toss it in the trash, use it as a knee pad, or hand wipes, but it is not, and never will be, a manual to help fix your engine....

Try these...
Engine -> https://docs.google.com/viewer?a=v&...NDg3Ny00YWM2LThkYjgtM2UyMzc3NDEwZDFh&hl=en_GB
Drive (if it's not an inboard) -> https://docs.google.com/viewer?a=v&...YWRiNy00ODUyLWFmNzgtMTBmMzhlNGY4Mzk3&hl=en_US
ECM diags -> https://docs.google.com/open?id=0B1TAvwZ3TjhfY09pYVBxZFE1WVE

HTH,

Chris......