Engine stalls. Lumpy seas. Restarts and runs at idle. Increase throttle there is a slight increase in rpm then engine bangs hard a couple time as if pre ignition then stalls. It restarts same result. Then the third of fourth restart it begins to run ok then maybe 30 mins later stalls. Same drill gets it back again. Highly annoying close to lee shore. Help needed soon I can’t afford Kennebunkport marina!!