yankee-flyer
Well Known Member
After finishing the 200-hr inspection, C.I., and pump replacement (in that order) I now find that when I've been at Flight Idle (throttle closed. RPM 2100-2600 depending on airspeed) that when I add power again the engine "stumbles" noticeably for something LESS than a second-- rough enough to shake the panel. Goes away when power is back on and isn't really noticeable on the ground. I can get a little bit of roughness (less than the "stumble" at power settings of 2300-2800 in flight at about 60-65 knots. Full power is normal as is the rpm at 75 kt. climb.
My first guess is that the carbs are slightly out of synch at low power settings. Don't know how it could be ignition since it's not a steady thing. I did not pull the carb bowls after installing the pump (flushed the lines, though) but here again I'd think anything in the carb would be continuous, bit momentary and at one rpm range..
I'd really like some thoughts from those who know and understand the Rotax.
THANKS!!
Wayne 120241/143WM
My first guess is that the carbs are slightly out of synch at low power settings. Don't know how it could be ignition since it's not a steady thing. I did not pull the carb bowls after installing the pump (flushed the lines, though) but here again I'd think anything in the carb would be continuous, bit momentary and at one rpm range..
I'd really like some thoughts from those who know and understand the Rotax.
THANKS!!
Wayne 120241/143WM