Ignition Issue
in 2 Stroke Technical Questions
9 years ago
Dear Rotax Group,
So I finally finished rebuilding my Kolb Firestar and its Rotax 503 DCDI and its flying/running great. Considering how long my airplane sat I have to say that things are going well. However, I do have one issue. The engine starts right up, and ignition check at anything over 2100 RPM checks fine but if the engine RPM gets bellow 2100, and I try the ignition check, the engine quits when I switch one of the modules. It happens on only one module as it runs fine on just the other so I guess I am starting the engine on the good one and as RPM goes up the other picks up.
I will doing a complete check of resistances on the module and its coil but I wonder if anyone has any suggestion regarding this issue. During the rebuild I did have to change the pickup wires on the modules since the insulation had turned to mush (very annoying considering how much these units cost) but i would be surprised if that is causing the issue.
As I mentioned, the engine starts very easily and runs great, even at idle (on one module I assume), but that module dropping off at low RPM has me worried.
Thanks for the help,
Chris
So I finally finished rebuilding my Kolb Firestar and its Rotax 503 DCDI and its flying/running great. Considering how long my airplane sat I have to say that things are going well. However, I do have one issue. The engine starts right up, and ignition check at anything over 2100 RPM checks fine but if the engine RPM gets bellow 2100, and I try the ignition check, the engine quits when I switch one of the modules. It happens on only one module as it runs fine on just the other so I guess I am starting the engine on the good one and as RPM goes up the other picks up.
I will doing a complete check of resistances on the module and its coil but I wonder if anyone has any suggestion regarding this issue. During the rebuild I did have to change the pickup wires on the modules since the insulation had turned to mush (very annoying considering how much these units cost) but i would be surprised if that is causing the issue.
As I mentioned, the engine starts very easily and runs great, even at idle (on one module I assume), but that module dropping off at low RPM has me worried.
Thanks for the help,
Chris
