So I have a 90 hp force 3 cyl. 1997 vintage. Spark is good all 3 cyl, new plugs, compression is 120psi each cyl, new carb kits installed in each carb (and cleaned even though they were clean), new fuel pump kit, all carb/throttle linkeages have been properly adjusted.
Problem is when accelerating slowly up through the RPM's, at around 1700 rpms she will start to die and eventually kill. If I choke it, it will recover and accellerate through to WOT. By changing the air mixture screws on the carb from 3/4 turn out to more, say 1.5 turns out I can get the RPM at which she starts to die to increase up to around 2100-2200 rpms. Again, when I choke it she will come around and accelerate up to WOT.
Also, if I can it from idle to WOT, it will accelerate fine and skip the issue around 1700-2200 RPMS.
While accelerating above the 2000 rpm area and up, it could run smoother than it does, but it could also be normal? This engine is new to me.
I have even hooked up the fuel supply to a portable tank, which made no difference.
Any help guys?
Problem is when accelerating slowly up through the RPM's, at around 1700 rpms she will start to die and eventually kill. If I choke it, it will recover and accellerate through to WOT. By changing the air mixture screws on the carb from 3/4 turn out to more, say 1.5 turns out I can get the RPM at which she starts to die to increase up to around 2100-2200 rpms. Again, when I choke it she will come around and accelerate up to WOT.
Also, if I can it from idle to WOT, it will accelerate fine and skip the issue around 1700-2200 RPMS.
While accelerating above the 2000 rpm area and up, it could run smoother than it does, but it could also be normal? This engine is new to me.
I have even hooked up the fuel supply to a portable tank, which made no difference.
Any help guys?
