mercury 250 pro xb help

[jonnyb]

it seems to have no power on a load. when i go to take off it is real sluggish until mid way up on plane then everything seems fine. then when i go to put it on the trailer it has no power even to run it up on the trailer, it just sits there and bogs no matter how far you push the gas. its on a bass cat cougar

 

[racerone]

New installation ???-----------wrong prop ???------------------------Compression test done ???-------Spark check done ????

 

[jonnyb]

just bought it, its a 2001 has a four blade trophy prop 26p. it was blowing out when it was trying to get on plane so i plugged two holes and it solved that problem but i dont know if it was doing it before i plugged them compression is good, dont know if he did a spark test