I have a 1999 mercury opti max 200hp....it bogs when trying to accelerate...gets to about 2000rpm and just bogs,,,return to nuetral and give it full throttle and it usually takes off,,sometimes it takes a few try's..then runs great,,ok here is all i've done,over past two years to correct with no luck,,,also i have had it in the shop many times,,mechanic is at a loss...also called mercury tech,,all i got was ,,have mechanic call them,,,replaced...plugs...throttle position sensor,,,nuetral switch,,fuel diaphram,,,tested fuel pumps,,,replaced check valve on return fuel line,,,relaced fuel line and bulb,,,had it on computer,,no faults..also replaced one each,,fuel and air injectors,,put new plugs in and ran a few hours,,one plug looked just a little different so replaced those injectors,,,any ideas?