mercruiser scan tool
 

where can I get one of these for my 502 MPI gen V? I'm tired of troubleshooting. Bucks County, PA.

http://www.rinda.com/marine/marinemenu.htm

The Diacom is the best, but the hand held scanner is all you really need.

Or you can build one of these:

http://www.offshoreonly.com/forums/d...an-1-00-a.html

And that will pull codes for you.

Another option

http://www.mefiburn.com/sc/details.asp?item=mefiscan1

scantool
 

I used the paperclip and test light on my L98 chevy back in the day. From my understanding, the Mercruiser scan tool can tell you what year the motor is as well as the true hours that are on it. is this so?