"I've got a 21' Maxum ('91 model) with a 5.0l Mercruiser. Tried to get it going yesterday, and the boat repair guy told me it's not getting any spark from the plugs. Told me that he's backed up, but that his recommendation is to change the plugs, and that I can do it. I don't even see where the plugs are at when I look at the engine, and have never worked on a marine engine. Help! Does anyone know where diagrams, pics, etc. are on the net that can help? I'm desparate!! Email is [email protected]."