I opened up a FAILED Sky-Tec STARTER. | Just to see what's inside
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- čas přidán 24. 08. 2024
- I decided to open up this failed Sky-Tec start from a Cessna 172. See what a Sky-Tec starter is made of and let me know if you see the root cause of why it failed?
#blairmech
#blairpilot
#joshuaryanblair
Thank you per show
The first plunger you pulled out is the starter solenoid at 0:58, equivalent to a modern starter with attached starter solenoid. If you will notice, on the top side of the two contacts that are bridged by the plunger, the top one is burned. In a 1989 Ford Bronco II that is a $15 starter solenoid (separate from the starter), in a C172... well, jus let me say that I don't want to pay that bill.
I see the video was from "way back" in 2021. :-) Am I too late?
what are the symptoms?
Does the solenoid make a big "klack" when the pilot is attempting to start the engine? Can the starter motor be made to run on a bench, bypassing the solenoid using a 12 volt power supply or a battery? My 1946 J3C-65 has been modified for electric start and uses the same set up. about four years it wouldn't work. Press the start button, no sound at all. I found an open 3AG fuse was in the hot lead to the solenoid. No reason why the fuse opened so I merely replaced it with a 5amp fuse. Worked right away and still works today. I hope you've already fixed it or sold the customer a new one and is still in your junk box. If so you might be able to fix it.
It wouldn’t make any noise at all with proper supply voltage. I didn’t find anything being an obvious issue. This was removed from a flight school’s Cessna 172, so I replaced it right away. I just decided to tear this one apart before junking it. Unfortunately this one is long gone now. I didn’t notice any fuses. Did you see one in the video? Perhaps I missed it?
I hoped to see a major failure and the root caused of the failure, however I can't say for sure. It was still good to just open it up. If you enjoyed watching or have a possible root cause of failure, be sure to comment below!
Did you run a continuity check on the armature and the 4 windings of the stator? Id also check continuity to the brushes. Did this starter not attempt to turn at all?
No I didn’t. I was given the unit to just throw away. I should have taken a little more time to learn…
I just spent a few mins. to look for anything obviously burnt and see what it was made of.
I would be interested to know if any of those parts can be cross referenced to the automotive industry
I’ll clean them up and look for any part numbers to see.
In regards to a Lycoming D2A 0320, is the bendix engaged to the starter ring prior to starting?
What a “Nothing Burger” video! Other than taking the starter apart there was no testing or even a suggestion why it failed!
Norman,
It’s about what the title says, just to see what’s inside.
I was told to just pitch it, so not much time to waste on it. However, I thought I’d at least open it up with a camera rolling and show what it’s made of. Perhaps I’d find something obvious before I tossed it.
I agree I should troubleshoot deeper with the next one…
Thanks for your comment!