UL Throttle Assembly

Nothing is easy, especially when you put a non standard engine on.

First off, here is the UL throttle assembly from their website.  To me, this looks like a bike cable.  We used something similar on the quarter midgets.  There is a ball on the end that hooks into the forward end of the throttle butterfly linkage, and a groove that it sits in.  This system is reliant on the spring on the throttle body to pull the cable forward.

I talked to Ray, and yes - this is what he uses on his plane.  Has not had a problem to date.  But, when i asked him about using this with a standard push pull throttle (he has a quadrant style), he had zero solution.

But he did mention that Zenith has a bracket for this.  Well, there is a UL powered Zenith at my airport that just flew.  I had some pictures of the install, and I emailed Greg today as well and he sent me another pic.  Here are both...

It appears that the 4 cylinder UL's throttle body is much farther forward (look at his air cleaner... it fits between the throttle body and the ring gear - that wont work with ours).

The mount on the engine used for lifting the engine is used to mount the throttle.  Also, the throttle cable is moved to the right of center.

I think the solution here is to use a throttle cable with a 10-32 male end, and get a 10-32 heim joint, with a spacer between them.  I have a throttle cable I can use for mock up, and ordered these from amazon.  Will see how it works out.  If I find a satisfactory solution, I will order the correct length mcfarlane throttle with one of their heim joints.

I am away starting wednesday for pretty much the next 3.5 weeks.