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  #1  
Old 03-07-2016, 05:02 PM
Mike S's Avatar
Mike S Mike S is offline
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Location: Dayton Airpark, NV A34
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Default SkyTech LS starter solenoid

This was in a prior post from Heinrich Gerhardt, and I thought it was worth having documented and easy to find.

"The solenoid mounted to the LS starter is a Ford PMGR unit as used on most Fords from around 2000-up. Just go to an autoparts store and get a solenoid for a 2005 Crown Vic. The Crown Vic only has one engine available, so it's an easy one to remember."
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Last edited by Mike S : 03-07-2016 at 05:04 PM.
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  #2  
Old 06-12-2018, 08:54 PM
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BruceEicher BruceEicher is offline
 
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Location: Wilsonville/Aurora KUAO Oregon
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Default Brand and part numbers...

For me the stock solenoid showed signs at 300 hours/3 year’s and failed at 400hr/4yr round numbers.
I replaced it from Napa with Echlin Ignition ECH ST421 which lasted less than a year and failed with almost no warnings.
Now it is replaced from O’Rielly with BWD S5613, only a few hours on it but working fine.
I have now on the shelf a spare from Amazon a Standard Motor Parts SS754
And another VAFer used Auto Zone’s Duralast SS1115

Any reports of which has been better or worse for you?
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  #3  
Old 06-12-2018, 10:06 PM
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hgerhardt hgerhardt is offline
 
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Location: torrance, ca
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So, why are so many of these Ford PMGR solenoids failing at such low hours? Skylor had an interesting theory: on airplanes, the ring gear and starter nosecone are exposed and pull in dust and grit kicked up by the prop and deposit that dust on the plunger of the solenoid, which eventually binds it up. To be clear, I'm talking about the smaller metallic cylinder, not the white plastic part. The clearance is pretty tight on that plunger. Of the three I've had fail in 750 hours, all have had sticky plungers. Cars have their ring gear and starter nose enclosed with a dust shield.

Or, the problem is cheap offshore-sourced parts. Including the ones that Sky-Tec supplies.

As shown below, the solenoids we're using look like this:



There are ones available which have rubber dust caps on the plunger; need to check if they will fit in the Sky-Tec housing. If so, could be an improvement.


Last edited by hgerhardt : 06-12-2018 at 10:09 PM.
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  #4  
Old 11-12-2019, 07:34 PM
NewbRVator NewbRVator is offline
 
Join Date: Jul 2018
Location: CA
Posts: 141
Default

I literally just put in a new Skytech 149-12LS starter complete on a Lycoming O-360 A1A and it is doing the same thing after 10 hours.

Click no start. Not the battery or master relay. Seems to be the starter solenoid. Arrrggghhh. Any help appreciated.

Was assisted by an A & P. He says send it back for another?!?

What say ye all.
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  #5  
Old 11-12-2019, 11:34 PM
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hgerhardt hgerhardt is offline
 
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I received a rebuilt LS from Sky-Tec and the solenoid lasted just a few hours... failed in Furnace Creek, Death Valley of all places. That experience is what drove me to figure out these LS starters.

You have 2 choices: send the starter back and wait until they replace the solenoid under warranty or you can just get the above-referenced solenoid and replace it while the rest of the starter motor remains attached to your engine.

On one hand you could make the point that Sky-Tec is responsible for the failure and have them warranty it, but on the other hand, I'd rather have my airplane back in the air in a day with less work on my part.

Last edited by hgerhardt : 11-12-2019 at 11:37 PM.
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  #6  
Old 11-13-2019, 08:03 AM
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bjdecker bjdecker is offline
 
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Location: Georgetown, TX
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Default Bad Solenoid...bad bad bad bad.

My Skytec 149-12LS began showing signs of a problem this summer -- right around the end of phase I with about 100 start cycles.

The first flight of the day wouldn't be a problem, but the second and third hops, after the engine was nice and hot and the ambient temps were > 95°F, turning the key would yield a "clunk."

I found a BWD S5613 at Advance Autoparts and installed it. The BWD unit looked a little different than the original -- the piston rode in a bronze liner, the electrical connections were more robust.

The piston in the original solenoid was sticking about 2/3rd of the stroke. The metal, once I removed the carbon/dirt/whatever, was pitted. Each time I depressed the piston I could see little puffs of dirt come out of the mounting holes...

B
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  #7  
Old 11-13-2019, 08:25 AM
NewbRVator NewbRVator is offline
 
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That’s what I will do. Replace the solenoid. If it works I will carry a spare solenoid. Thanks for the replies.
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