2003 90 HP Mercury Saltwater series no spark in 1 cylinder

[tuggator]

Plugs are new this seaspm and only slightly fouled then cleaned and reinstalled. Not getting any spark out of the # 1 cylinder. I will replace the plug and see if this helps. The engine is on a 1703 Trophy center console. My mechanic buddy thinks its the coil, and says he can smell gas that hasnt burned off. Hopefully it can be sorted with a new plug. Still not getting more than 17 kts out of the boat. Any thoughts on possible fixes or where to look. Any idea how much a "coil" costs? Thank you in advance

 

[Texasmark]

Swap coils with another cylinder and see if it follows the coil. Cost around $90. Check here first then Sierra.

Mark

 

[tuggator]

Thanks Mark thats what Mechanic buddy recommend to do....hopefully do that this weekend.

 

[tuggator]

Texas Mark My mechanic buddy swapped coils and you are right no spark so next move is replace the coil. Thanks for the heads up. Will let you guys know how I make out when I get the coil replaced. Thanks again Tug Gator

 

[enginepower]

I just had the same problem losing #1 spark on my 95 model 90HP and it ended up being the switch box. http://www.cdielectronics.com/support/ has good troubleshooting chart to help you find the point of failure. Note: sometimes one component fails and causes another to fail to make sure to follow the steps to check it.

 

[tuggator]

Thanks Guys My Mechanic Buddy replaced the ICM and is running tip top....for now!