I'm new posting here but have been a reader on the site for a few years now.. I must say it awesome what you guys do here.. I find myself posting after having had bogging issues with my mercruiser 120 4.3 on a 89 renken..after replacing the coil, condenser and points along with exhaust bellows due to the boat not starting after winter... Since correcting that issue the motor was hard to start a few minor adjustments to the carb problem solved(was bogging on idle). Took the boat for a test run Thursday. Boat started off dock great, got on plane pulled about 5k rpm. Ran the motor 10 to 15 minutes and After slowing idle speed momentarily and attempting to accelerate away the motor bogs. Start the boat cranks fine, give it gas bogs down shuts off. Repeated same thing a couple times and decided to adjust the carb a bit more. After a little tinkering was able to get started back up on plane. Shot around the lake for another couple hours. The stall still happened but was fewer and farther between. Assuming bad gas was the culprit left the lake filled up with 87 no ethanol gas and added Seafoam. Went back to the lake to day to test it out and it's way worse. Hard to start without giving a lot of throttle. Bogs under load low and high rpms. Boat will no longer plane and motor will not reach 3k rpms. Kinda has me puzzles. Tried to be thorough with the post. Help!!!