Been having issues since end of last year with my boat stalling at low rpms and bogging down when giving gas, basically running like crap. Issue does not seem to happen right away but about half hour into trolling. Did find some water in the fuel end of last year i changed the water separator and added some dry gas and it seemed to run a little better.
Had the shake down run last weekend and the boat ran great for the first 4 hours and then started to stall and bog down again, luckily made it back to te launch after getting the rpms up for a bit. Had the boat looked at this week and was told the problem was solved , the water separator was changed again for some water in fuel and was told to run with only 1 gas tank, well of course about a hour into fishing today the boat did not run good and had to keep the rpm's up around 1000 to 1100 to keep from stalling, even when I started back to port and raised the rpm's it bogged down then leveled out so i was able to get through the channel with out stalling, pulled the boat brought it home,took off the water separator and no water in the gas. Motor is mercruiser 350 5.7 liter fuel injected. Any suggstions would be greatly appreciated