M20B Throttle Disassembly 660190-003?

[BrettD]

Hey there I just bought an M20B and I am having some problems with my throttle. I believe the part number is 660190-003.

 

The button is stuck inward, causing the throttle to move around freely. It was somewhat dangerous because when you put the throttle in idle it slides itself in and starts adding power when you are trying to land(float \ bounced landing) if it is not held outward.

 

Is there some way to remove the button\knob and repair it? I looked all over the internet but never found anything. I wanted to see what the best options are.

 

[47U]

1 hour ago, BrettD said:

I wanted to see what the best options are.

Welcome, BrettD…

Best option?  McFarlane is the go-to for replacement throttle/prop/mixture cables.  I think they’re even PMA’d for Mooney now, as opposed to an owner produced part.

[BrettD]

21 hours ago, 47U said:

Welcome, BrettD…

Best option?  McFarlane is the go-to for replacement throttle/prop/mixture cables.  I think they’re even PMA’d for Mooney now, as opposed to an owner produced part.

Thank you, I was looking at McFarlane and it looks like their throttle is only certified for the M20C? I have the M20B. And it's out of stock unfortunately.

 

Is there any way to repair the button on my cable? or is it a lost cause and needs replacement?

[N201MKTurbo]

Shoot some lube around the button and push it a zillion times. It will probably loosen up. In this case, too much is just right.

Also shoot some where it goes into the panel. You have nothing to lose.

[47U]

1 hour ago, BrettD said:

Is there any way to repair the button on my cable? or is it a lost cause and needs replacement?

I’m not sure, but that throttle cable doesn’t look factory.  I could be wrong.  Regardless, as N201MKTurbos suggests, you could try spraying some silicone spray, or maybe some LPS2 in the to see it if the button can be freed up.  

If that doesn’t work, McFarlane is still your best bet.  They can provide you with the paperwork to fulfill the requirements of an owner produced part.  It wasn’t that long ago that McFarlane had only the mixture cable PMA’d for vintage Mooney’s, and I did the paperwork for the throttle and prop governor to replace all three at the same time.

[EricJ]

2 hours ago, BrettD said:

Thank you, I was looking at McFarlane and it looks like their throttle is only certified for the M20C? I have the M20B. And it's out of stock unfortunately.

 

Is there any way to repair the button on my cable? or is it a lost cause and needs replacement?

McFarlane can make a cable by duplicating your existing cable.   There is a process that is described on their website:

https://www.mcfarlaneaviation.com/customs/custom-push-pull-controls/

 

[cliffy]

Call me crazy but that is not the original throttle cable. 

And, it is far too gone for repair considering the consequences if it fails 

Two options:

1)  McFarland and they will help with building a legal new one

2) Any number of aircraft salvage yards will have a workable unit but it will likely be an original type (not vernier)

In reality one doesn't need a vernier type anyway as most flying is done at WOT on 4 banger Mooneys. 

A new one is a "cost of operation" in the aviation world. 

 

[65MooneyPilot]

I have replaced two control cables in the last 6 years. I ordered them from LASAR and when I received the factory cables they both had McFarland tags on them. So just go to McFarland first. It is where the factory cables are made now. 

[BrettD]

On 2/14/2025 at 1:50 PM, cliffy said:

Call me crazy but that is not the original throttle cable. 

And, it is far too gone for repair considering the consequences if it fails 

Two options:

1)  McFarland and they will help with building a legal new one

2) Any number of aircraft salvage yards will have a workable unit but it will likely be an original type (not vernier)

In reality one doesn't need a vernier type anyway as most flying is done at WOT on 4 banger Mooneys. 

A new one is a "cost of operation" in the aviation world. 

 

 

Thanks I will try to reach out to Mcfarlane... I believe it is the original cable. I looked at some other M20B models on trade a plane and they seem to have the identical setup.

[JimC67]

On 2/16/2025 at 4:17 PM, BrettD said:

 

Thanks I will try to reach out to Mcfarlane... I believe it is the original cable. I looked at some other M20B models on trade a plane and they seem to have the identical setup.

That's the one I have on my B model.

[phxcobraz]

I got a basically brand new one for my C from a salvage yard, had McFarlane tags on it. 
McFarlane does have most part numbers they can make a cable for, but when I talked to them they said safest bet is to just send yours in and they will duplicate.