Mercury 2 stroke bogs down
Hi chaps, been having ongoing issues with my (approx) year 2000 carb'd Merc 150 stroker. We have had water in the fuel tank and to be honest I put most of the subsequent issues down to that. Avoided removing the carbs for a clean and have that on the list to do but the other day the engine started doing something it hadn't done before which has me thinking differently. At WOT the engine was dieing then picking up but without any control input. The thing is the tacho wasn't dropping with it but remaining at the WOT rpm which I believe indicates an electrical problem. Would anyone have any idea as to which component might cause this? I know from Uncle Al explaining to me that the tacho remains at the rpm at which the engine was shut down so I am assuming this will be an ignition problem.
All help and opinions appreciated.