I have a 78 evinrude 115 . I recently rebuilt the fuel pump and changed all my gas lines and rebuilt my carbs and changed out my spark plugs and my water seperator filter and even got a new prop. Anyhow the last time on the water the boat would idle ok then when in WOT would get up in rpms then bog way down then with the throttle still in full mode would take off again and then back to bogging again . Unless I kept it in low rpms it would run enough to get around but you could feel a little hesitation in the engine. After a while I tried again and it would do the same thing , but instead of bogging it would die. Then was hard to start. I limped back checked spark compression and even swapped out the gas tank . Compression was great lots of spark and I cleaned the carbs again. Still running poorly sounds like its missing . At first when I start it it sounds ok then 10 seconds in it starts running funny??? Power packs coil??? Any feedback is helpful . The plugs were a little wet also. Sorry so long winded.
