 Mid Range Stalling
This problem is costing me time & money!
I have a 1996 Merc. 225XL (carbureted) S/N 0G429317 on a Wellcraft 220 Coastal with a stalling problem.
The motor starts, idles and will run all day at various throttle settings. The problem is accelerating to a speed.
When I move the throttle up slowly, the engine will stop responding between 1500 and 2000 rpm. If I continue to move the throttle up it will stall and die. The engine will start right up. The only way I can accelerate is to move the throttle quickly from idle to wide open then the engine will easily accelerate to about 5500rpm. I can back off as low as 3000rpm. If I reduce rpm any further, it will gradually die unless I come down about 1500 rpm. An authorized Merc. repair shop here has rebuilt the carbs., fuel pump, changed the temp sensor and the throttle position sensor. They ran diagnostics and found nothing. They put the boat in the water and it does just what I have described above. Now they are thinking that it could be the ECU and/or the stator...I took the boat home.
If anyone has any connection with a Merc expert, please help!!! | 
