912 choke cables

I agree on the throttle cable, but on the choke cable I find it easier to slip the cable out of the elbow (bent tube) for certain operations. 

Who is the manufacturer? They probably make them. 

Hi James,

Can you provide a photo or more details?  I have the McFarlane choke cable that has stranded wires.  I am trying to figure out how to attach the stranded wires on the ends of the choke cables to the choke arm.

Second question, I see that McFarlane has both locking and non-locking push-pull choke cables.  I bought the non-locking.  Now I see that the choke arm spring is pretty strong.  Will I have to hold the choke until it's not needed any more?  I have no Rotax 912ULS experience, so I don't know if the choke needs to be pulled out for just a short period?

Thanks!

Mike

Oops...  I think I posted too soon!  In my McFarlane Choke cable knob package, I found two McFarlane part # 6515 "Barrel Stop Assemblies".  See photos.  This is exactly what is needed to connect the stranded choke cable to the choke arm on the engine.  Pass the end of the stranded choke cable through the barrel stop until the end is flush with the edge of the barrel (i.e. don't push it all the way through the barrel.)  This way, the barrel can fit into the holes on the choke arm.  The set screws are SMALL and require a 0.050" hex wrench.  I happened to have a 0.050" hex screwdriver that I bought years ago from McMaster-Carr.

Hi Michael.

"Will I have to hold the choke until it's not needed any more? "

The short answer is YES!

The starting procedure for a cold Rotax 912 is:

NO throttle

FULL choke

Start - Engine should fire within a revolution and (assuming SOFT START) go to low/mid 2000 rpm within a few seconds.

The choke can be reduced by about half at this point.

As engine warms, rpm will rise. Choke can be completely closed and throttle increased to maintain high speed idle 2-5000 rpm as engine warms further.

I find two cloths pegs to be useful (don't laugh). Put the two pegs on the choke button shaft - start engine - remove one peg when engine rpm rises - remove second peg when deemed appropriate. Works very well for me and frees my hands/attention to other matters.

I also find that if choke completely closed a tad early, the engine will run a little rough until temperatures rise. 😈