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#12775515 - 05/31/18 11:30 AM ECM Fried??? 2002 Mercury EFI 200 2.5L
DillonCan'tFish Offline
Pro Angler

Registered: 08/03/11
Posts: 532
Loc: Midlothian / Waxahachie
Trying to help a buddy get his boat fixed after it randomly died on him idling out of a cove. Now he has no spark at any of the cylinders. It was running just fine, then it just went off. No sputter or anything, just off. This guy is a stickler when it comes to maintenance and the boat hasn't had so much as a hiccup since he got it.

2002 Mercury 200 EFI 2.5L

Checked stop circuit including ignition switch, neutral & kill switch. All good. Plenty of oil. All fuses on side of motor are good.

-Key to on: No beep. No fuel pump. Dash lights come on.
-Key to on and wait 10 seconds: Sounds like fuel pump kicks on and solid alarm sounds. Alarm and pump stays on until key is turned off. Fuel will continue to prime for a few more seconds after key to off and then stops.
-Key to crank position: Engine turns over but has no spark. Tach is getting a reading during cranking.

Took it to a mechanic that said he would scan it for him at no charge. Scan tool won't connect. Told it was probably a bad ECM.

Is there anything else we can check before he starts throwing parts at this thing? I have no reason to doubt the mechanic, I just want to check everything we can before he shells out that kind of coin.

#12775976 - 05/31/18 06:57 PM Re: ECM Fried??? 2002 Mercury EFI 200 2.5L [Re: DillonCan'tFish]
Micheal Offline
Extreme Angler

Registered: 01/22/02
Posts: 1226
Loc: Lake Fork Texas
Listen to your mech.
The ECM for that motor is no longer available.
Best chance is to get that on repaired if possible.
Micheal's Marine. Mobile Boat-Motor Repair Ser.

#12781595 - 06/05/18 06:33 PM Re: ECM Fried??? 2002 Mercury EFI 200 2.5L [Re: DillonCan'tFish]
dan805 Offline

Registered: 05/04/07
Posts: 72
Loc: TX,The Colony
same thing happened to me last year. Sent my ECM to Simon Motorsports these folks as I was told they are the best. I agree they are very good, did a great speedy job.

Simon Motorsports/Simon Performance Technology
1900 Joe Crosson Drive
El Cajon, CA 92020
2000 Champion 191 Merc 200EFI
There's only 1 way to Rock


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