Contintental Motors CSB19-01

[milotron]

A service bulletin that removes the primer solenoid valve for continental TSIO-360 and 550 engines was issued. Effectively replaces it with a hose and a plug.

 

Any idea what has prompted this? Aside from the solenoid begin crazy expensive, they seemed pretty reliable and effective. And they want us to send this crazy expensive bypass solenoid back to them, while also buying hoses from them. What a deal...

 

CSB19-01.pdf

Edited February 7, 2019 by milotron

[Guest]

Failure of the internal “O” ring can cause a fuel leak.  They can be disassembled and the “O” ring replaced. Failure of the “O” ring affects total fuel flow to the engine and power loss.

Clarence

Edited February 8, 2019 by M20Doc

[N231BN]

At the end of the CSB is the warranty section. States 2 hours labor and parts included, am I reading that correctly?

[Guest]

Warranty would be applicable to only those engines still within warranty coverage.  Older engine owners would be on their own.

Clarence

[N231BN]

That makes sense I guess, thanks.

[M252]

Any hints on a fast and cheap supplier for the 2 parts for TSIO360-MB1?:

-          2024 Plug, 13-27

-          646644S4S24.00   Hose Assembly

[milotron]

I have been told the Mooney hose is $380CDN. There is a cessna 'equal' at 1/3 of that.

I have also been told that I don't HAVE to do this as a non-commercial operator in Canada.

[M252]

Curious to hear what other M20K pilots do with this CSB...

And what impact it had on priming etc.

[milotron]

I can prime mine just fine by using only the boost pump and full rich/cracked throttle. Just as effective, in fact sometimes it fires a bit better. I did this for awhile as I had a wiring issue causing the primer fuse to blow.

 I am assuming that this will make little difference.

[kortopates]

I have been told the Mooney hose is $380CDN. There is a cessna 'equal' at 1/3 of that.

I have also been told that I don't HAVE to do this as a non-commercial operator in Canada.

True, for here in the US too. But note this kind of SB from TCM is being submitted to the FAA for AD status.

So we can all wait to see if the FAA agrees to make this an AD, but given the seriousness that TCM is giving this issue and what they say about the consequences in the SB I am really not concerned about the cost as much as I am about safety of flight; even with 15 years on my engine without issue.

 

 

Sent from my iPhone using Tapatalk

[Phil EF]

Just spoke with Continental tech rep. His understanding is there was a single failure causing a power loss. 

My K has had the diverter valve for 40 years and always works great. 

SB Applies to ALL tsio360’s from the GB on up as well as the 550’s. 

[exM20K]

Not applicable for Acclaim. 

[ilovecornfields]

It looks like it doesn’t apply to the IO-550G in the Ovation unless I’m reading it wrong.

[kortopates]

Neither The Acclaim nor Ovation have a diverter valve, which is why it doesn’t apply to them.


Sent from my iPhone using Tapatalk

[M20S Driver]

Ovation Juniors A.K.A. Eagles (M20S) don't have them either.

[M016576]

2 hours ago, M20S Driver said:

Ovation Juniors A.K.A. Eagles (M20S) don't have them either.

Nothing “Junior” about the M20S.  Finest NA longbody mooney out there if you ask me.

[M252]

For those 252-drivers who already removed the diverter valve: were you able to re-use the existing hose assembly that connected the diverter valve as the new bypass or do you really need the new hose for the TSIO-360 MB?

[M20kflyer99]

What a PITA.  I had this exact part fail 2yrs ago and had a hell of a time sourcing the 14v version to the tune of $3200 plus R&R.    We reached out to both Mooney and Continental looking to bypass the diverter and they both said absolutely not, it's part of the TC.  

 

I'm glad to see this thing go.  I can tell you from experience that the engine would not run without the high-pressure boost pump.  I feel fortunate it failed on the ground!

Edited February 14, 2019 by M20kflyer99

[Bob]

After buying a zero time rebuild engine from Continental, I flew to Alabama to have Continental diagnose a issue.  Part of the testing included bypassing the diverter valve, but only for a ground runup.  I asked them if I could fly it while bypassed, for a test flight, and they refused to allow me. Now they are insisting that it be removed.  AS USUAL NICE AND CLASSY CONTINENTAL!

[chrisk]

I'm kind of curious how to manage engine starting after this is done.  

For a cold start, no issues.  Just bump the high pressure boost pump instead of the primmer.   What about a hot start? Usually priming is not required to get it to start, but after it starts, a quick shot on the primer keeps it going.   Presumably using the high pressure boost pump could be used the same way?

[milotron]

5 hours ago, chrisk said:

I'm kind of curious how to manage engine starting after this is done.  

For a cold start, no issues.  Just bump the high pressure boost pump instead of the primmer.   What about a hot start? Usually priming is not required to get it to start, but after it starts, a quick shot on the primer keeps it going.   Presumably using the high pressure boost pump could be used the same way?

I can't speak to the bypass operation, but it starts just fine using the boost pump to prime the engine before start instead of the primer. I had a wire chafing issue and the primer fuse kept blowing so I used the boost pump only to prime.

[chrisk]

For those looking for the parts.  You might try Aviall.  https://www.aviall.com/aviallstorefront/p/641085=0H

[gsxrpilot]

Mine is done. The SB has been complied with. There is absolutely no change to either hot or cold start procedures. I use the primer exclusively and never use either high or low boost pumps for starting.

Cold start takes a few seconds of prime and hot starts take either just a quick shot of prime or nothing at all.

[Marcopolo]

On 3/25/2019 at 12:45 PM, gsxrpilot said:

Cold start takes a few seconds of prime and hot starts take either just a quick shot of prime or nothing at all.

Hi Paul,

  I think the question is,

 

  Now that the prime is disabled/removed, how are you going about the process for each cold and hot starts?

 

I am assuming the momentary mode of high boost would closely simulate the prime action but still it moves fuel into a different area than the prime circuit used to.

 

Ron

[DanM20C]

Does anyone know the reason for the change in cylinder drains?  I'm finishing up an LB rebuild and I need to buy the different style drains.   $50 each, I'm getting tired of sending Continental my money.

Cheers,

Dan