I just hooked up a used 112 SPL on my boat, a 21 foot wooden deadrise. It hadn't been run in about two years, but it seemed to run pretty well this Saturday when I fired it up. I ran it for a few hours with no incident. The next day, I mixed a new tank of gas and took it out again. It ran rough in all RPMs. Like it was missing and trying to die. So I figure I need to tune it up.<br />What do I need to replace? Plugs, wires, coil?<br />I think the best plugs for this motor are Champion QL82C. I guess I should get an impeller and T-stat while I'm at it too. Anything else?
