Re: New Mariah Owner
 

Chris,
I had a couple of more thoughts from your previous thread. Have you double checked the multiple power and ground wires at the ECM connector? If it is missing any of these it could be the cause of your no start/fuel pump problems. Check that you have good solid grounds on J1-14 and J1-30 (black wires with white stripes). Check that you have solid battery voltage at J1-11 (pink/blk) with the key on and J1-16 and J1-32 (both Orange) key on or off.
MPI motors are great when they run but tough to troubleshoot when the don't.
Happy hunting.
Steve

Re: New Mariah Owner
 

Hi Steve,

Performed check on each socket on both J-1 and J-2. Every thing checked out except J-2-26. Manual does not indicate any voltage reading and with the J-2 unplugged from the ECM J-2-26 is carring 10 volts. J-2-26 is for the Audio warning buzzer and the buzzer does not sound when ignition switch is turn on. Did trouble shoot buzzer and it is good. Hopefully the Scan Tool will indicate a trouble code and lead to something and hopefully not the ECM.

Re: New Mariah Owner
 

Hi Chris, No I have not had any problems at all with the motor, replaced plugs wires and rotor last summer because I had a skip in it, found a plug wire had a hole burned in it but no problems at all.

Re: New Mariah Owner
 

Nice looking boat!! Congrates!!

Re: New Mariah Owner
 

My son just bought a 1993 180 Diablo - what a beautiful boat for it's age - I am quite impressed. We are getting it checked out, but it looks well taken care of. This is a great community you have here!

Re: New Mariah Owner
 

Glad to know there is another member from South Louisiana on here. I frequent Lakes Maurepas and Ponchatrain. Send me a note if I can help with anything.
Happy Boating
Dan

Re: New Mariah Owner
 

Hi Dan,

I usually stay around Stevensville area and sometime toward the coast. Just got back from vacation today and Scan Tool came in. Hooked it up to the connector on the engine and it does not communicate with the ECM. It gives a check connection note. Checked all wires from the connector to the ECM and all check out. The grounds are grounded the power wires have power, the connections are good. I need to talk to someone who has experience with the Scan Tool. Maybe some one here has had experience with the Mercruiser Scan Tool, if so any info would be appriciated.