Question: just looking for opinions as to how viable is it to operate a 912ULS on single ignition for about an hour's flight to ferry to the repair shop to troubleshoot/service the bad mag?
long story: Flight designs CT2k with 1200h on the flydat, 1015h flight time, with soft start modules installed. flawless operation to date.
Fuselage was trailered to shop to replace sprag clutch, also put in soft start timing flywheel. that service completed, returned to base and wings re-assembled, restarted no problem, balanced carbs, stable EGT, smooth running, but excessive mag drop on right mag check (5-600rpm drop, from 4000rpm check). EGT on #2 cylinder drops on bad mag, and very rough running.
Checked carb bowls, no debris. Checked spark plug connectors, replaced #2 bottom boot as it was rather loose (<<7lb pull). Still rough running on R mag.
Reversed CDI connectors (red/blue, Green/white) Still obtained mag drop, but on the LEFT mag and still on the #2 cylinder.
This tells me the problem is before the CDI units, maybe trigger coil connectors, possibly due to the fact we were in the vicinity when doing the sprag clutch work. The CT is a very tight installation, and unless there is some way to trouble shoot without taking the engine off, this is a problem to once again trailer the fuselage to the shop. Is it OK to fly with the single mag? Engine runs smooth, and EGT is stable on both mags, or on the single good mag.
long story: Flight designs CT2k with 1200h on the flydat, 1015h flight time, with soft start modules installed. flawless operation to date.
Fuselage was trailered to shop to replace sprag clutch, also put in soft start timing flywheel. that service completed, returned to base and wings re-assembled, restarted no problem, balanced carbs, stable EGT, smooth running, but excessive mag drop on right mag check (5-600rpm drop, from 4000rpm check). EGT on #2 cylinder drops on bad mag, and very rough running.
Checked carb bowls, no debris. Checked spark plug connectors, replaced #2 bottom boot as it was rather loose (<<7lb pull). Still rough running on R mag.
Reversed CDI connectors (red/blue, Green/white) Still obtained mag drop, but on the LEFT mag and still on the #2 cylinder.
This tells me the problem is before the CDI units, maybe trigger coil connectors, possibly due to the fact we were in the vicinity when doing the sprag clutch work. The CT is a very tight installation, and unless there is some way to trouble shoot without taking the engine off, this is a problem to once again trailer the fuselage to the shop. Is it OK to fly with the single mag? Engine runs smooth, and EGT is stable on both mags, or on the single good mag.
