blackhawk2020 - Poor Mid Range

[blackhawk2020]

Hello i need help with my mercury outboard. First off please dont tell me to take it to a mechanic, i have not worked in six weeks may not for a awhile longer.I have a 1997 90hp mercury, my issue is very poor mid range takes for ever to get up on speed and plane. i replaced the stator and trigger, they went bad. I had this problem before that. I tried to sync the carbs but to no avail, do not think its the reed valves not blowing fuel out. If anyone can help i would appreciate.

 

[Scott Danforth]

first, start with the basics

what is the compression on each cylinder.

next, prior to trying to sync the carbs, did you rebuild the carbs?

 

[blackhawk2020]

Ok here is what i have done, i rebuilt all three carbs clean as can be, replaced all of the fuel lines lines from the water/fuel separator to the motor, rebuilt the fuel pump getting good fuel to motor. The compression is 125 all three good spark new wires and plugs.

 

[blackhawk2020]

ok heres the update maybe this can help someone like me. First its still running a little slow in the mid range but is so much better, a little bit more adjusting yet. I went and synced the carburetors through the ignition section ( was not in the fuel section ) of the manual. Made a great improvement, not a perfect hole shot response but gets up on plane a lot faster and has a higher wide open. Well persistence pays off.