Dave,
I did not have any good indication that something was going wrong with the
throttle. The clues in hind sight was the first go around that it would not go
to low idle more like 1200 rpm and it went to full throttle fine for go around.
The next try I shut it down on roll out and restarted a few seconds latter and
it dropped to 650 idle on restart. The take off I thought the rpm's were a
hundred low or so but climb was still over 800 per minute and no other signs of
problems. All this I attributed to having a different prop with a lot more
pitch in it. It was not until decent at home that things became apparent. The
throttle started to get caught and it was mostly at the 1200 rpm area. Altough
it did stick at full throttle briefly and at full idle breifly.
I pulled the entire cable out of the plane yesterday and tore it apart. It
was dirty inside from what seems to be the oil wicking up the cable interior.
It seemed like there was excess dirt and oil in the vernier parts. It appears
that the vernier is meant to be dry with no oil or grease. I may have in the
past gave it a shot of WD-40 thinking that it was good for it. It went back
together and seems to operate smoothly, but it is not going back in the plane.
I have a new one coming tomorrow. My concern is that with all the yanking and
pushing on the cable that the ball bearing could have scared the interior
threads of the vernier and might be able to find that spot again.
Before I pulled the cable out I tried running it on the ground again
beacause I had changed props again and I wanted to see if I could reproduce it
on the ground. After the cable was freed up i could not get it to stick agiain
with out the engine running. I started up and it seemed normal for a for a few
push pulls but i did not rev above 1800 because my truck was still paked i
front of me. Then just a suddenly as before it stuck at 1200 rpm and would not
move again. I let it ruat that for a few minutes to check prop track and shut
it down with just the mixture pull. As soon as i tried it again after shut down
it freed up again and kept working.
The carb was tried for operation without the cable connected and worked
perfactly but that is not going to stop me from pulling the carb out tonight
and making sure the slide is in perfact working condition on the bench.
I am not sure what i could have done differently in my annual,
maintneance or evaluuation of things that would have prevented this latest
adventure. Am I the only one that seems to screw up so much or am I the only
one that admits it?
Joe Horton,
Coopersburg, Pa.
____________________________________________________________
Mortgage Rates Hit 3.25%
If you owe under $729k you probably qualify for Obama's Refi Program
http://thirdpartyoffers.juno.com/TGL3141/4ca0a2b4ddd15d3f036st05duc
