I have a 1996 Mercury 150 with a 21 X 14.75 vented stainless prop. Idles good but when you try to get out of the hole you have to move the throttle slowly and stop when it gets to 1800rpm and wait untill the rpm start to rise to 2000rpm before you can advance the throttle to wide open or it will bog and die. Once it goes to 2000rpm you can go wide open and it will take off. I've replaced the entire ignition system, rebuilt the carbs, rebuilt the fuel pump, replaced all fuel lines, replaced bleed lines and verified check valves work, new chris carson reeds, replaced water pump thermastats and popet valve, removed idle stabalizer box, adjusted timing and set all adjustment as per factory manual. Compression is 110 an 4 cylinders and 105 on 2 cylinders. I've talked to several mechanics who all say there is no reason this motor should be bogging down. One mechanic told me i might need to change my jets to adjust for the compression loss from when it was new. I can't find anything on this has anyone heard of this?
