I have Chrysler 115hp. Engine worked perfectly until last weekend. Engine started to bog out, returned to wharf. Engine turns over but wont catch - sounds like battery doesnt have enough power to start engine. Pulled boat out and boosted with my truck, engine started after spraying some gas in carbs. Dropped back in water and left for a few hours. Returned and tried to start, rolls over but again sounds like battery doesnt have enough juice to start motor. Bought new battery - same result. When i did boost the engine and it started, it did not run well at idle and would stall if i didnt give it some throttle. Any help would be much appreciated!!!!!!!