912 ULS, HARD START, ROUGH RUN

I have the 966726 modules with have 6 pin connectors but the engine serial number puts it in category "C" which, according to the SI, requires a different flywheel hub. 

I have the 966726 modules which have 6 pin connectors but my engine serial number puts it into category "C) which, according to the SI, requires a new flywheel hub.

I have a 2008 912ULS with 6 pin connectors and just did the ignition module upgrade only, the fly wheel was recommended but not required. I did this upgrade back in 2013 due to kick back at start up, the new modules fixed the startup kickback issue. I believe the newer flywheel just optimizes the timing during start process. If you order new modules Lockwood Aviation also sells a wiring kit that you will need, it connects each module to the start switch for the timing delay activation in the module.

Lockwood item code. ELSSW-1 Wiring "Y" and fittings for hookup of 965 444 soft start feature on electronic module $29.95

Thanks, Garrett,

The light finally came on that we were talking about the Timing hub, not the wiring harness.

And I agree, the tabs on the hub set the timing.

The new tabs are probably a little longer at the trailing edge causing the Soft start to be a little softer (More Delayed).

The original hub should still give you a soft start just not AS soft.

The normal operational timing after starting should not be effected in either case

If you don’t get a rev drop when switching from BOTH to LEFT and a complete cut when switching from BOTH to RIGHT you may want to carefully check if there is a constant bridge to ground on the RIGHT circuit. Chances are that your engines more or less runs on the LEFT circuit only - thus no drop when „switching off“ the RIGHT circuit (which is always off when bridged). Turning off the LEFT (by switching from BOTH to RIGHT (which may be off already) will cause the engine to stop.

Carefully investigate wiring and connectors is likely to save you some dosh.