No spark on both plugs, both engines. I replaced the two small pwc batteries with a larger single battery, which required taking the exhaust off. upon doing this I saw the starter was bad, so ordered and replaced it. Yesterday I put the exhaust back on and plugged in the hose to try running it. Apparently the exhaust gasket didn't seal and the water flowed right into the engine, which wouldn't be the end of the world if I could run it, but again, no Spark. Any Ideas? All other electronics work and all of the fuses are good...