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Author Topic: Would you Crock Pot a Ro-Jett ?  (Read 1838 times)

Offline goozgog

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Would you Crock Pot a Ro-Jett ?
« on: January 29, 2017, 08:57:49 AM »
  Gentlemen, I have a bar stock
Ro-Jett .65 that's running perfectly,
but after many hundreds of flights,
it's getting brown and gummy.

It has run exclusively on Powermaster -
Ro-Jett fuel.

  Usually, I would crock pot it in new,
green, antifreeze, but I'm concerned about
pitting the bar stock case or removing any
"good" cylinder varnish.

  Should I just remove and clean the head?

What do you think?

Cheers! - K.
Keith Morgan

Offline Tim Wescott

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Re: Would you Crock Pot a Ro-Jett ?
« Reply #1 on: January 29, 2017, 09:12:30 AM »
must not... resist... wouldn't help...  Oh hell!

I would, but only after asking here.  Or maybe after asking Dub for his recommendation.  Most engines I'd just do whatever I wanted to with, but those are pretty special engines.
AMA 64232

The problem with electric is that once you get the smoke generator and sound system installed, the plane is too heavy.

Offline Motorman

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Re: Would you Crock Pot a Ro-Jett ?
« Reply #2 on: January 29, 2017, 09:54:32 AM »
blank
« Last Edit: March 06, 2022, 09:35:56 AM by Motorman »

Offline FLOYD CARTER

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Re: Would you Crock Pot a Ro-Jett ?
« Reply #3 on: January 29, 2017, 01:12:31 PM »
The instructions for the bar stock RO-Jett recommend not using any "cleaner", but merely wiping with a clean cloth.  No specific recommendations come with the cast crankcase.  Other than making the bar stock engine look less shiny, this engine is just like any other, which can be dropped into a crock pot/anti freeze.

My RO-Jett 61 (cast case) got varnished up after much running.  I removed the cylinder head and polished the bore with a Scotchbrite pad, which removed the carbon.  On mine, only the muffler gets all dark from burned fuel/exhaust.

Floyd
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Offline goozgog

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Re: Would you Crock Pot a Ro-Jett ?
« Reply #4 on: January 30, 2017, 05:27:14 AM »
Thanks everyone!

   I think I might just remove the head and
crock pot that and also do some tests with
some 6061 scraps.

I'll report back with my results.

Cheers! - K
Keith Morgan

Offline Gerald Arana

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Re: Would you Crock Pot a Ro-Jett ?
« Reply #5 on: January 30, 2017, 09:53:03 AM »
Keith,

Don't use any cleaner that has ammonia in it. It WILL turn the aluminum black. Don't ask me how I know...............

Jerry

PS: I use Prestone anti freeze in mine with great success.

Offline Air Ministry .

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Re: Would you Crock Pot a Ro-Jett ?
« Reply #6 on: January 30, 2017, 08:56:32 PM »
Acetone / Lacquer Thinner useually gets Triumph Aluminum parts squeeky clean . Just the head first thou, Eh .

Quote
Don't use any cleaner that has ammonia in it. It WILL turn the aluminum black

And Whats Wrong with a BLACK motor, anyway .  ;D

Er , bicarbonate soda boiled & a OS 29 got a ' magnesium ' crank case , too .  :P
« Last Edit: February 03, 2017, 06:17:56 PM by Matt Spencer »

Online Brett Buck

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Re: Would you Crock Pot a Ro-Jett ?
« Reply #7 on: January 30, 2017, 09:03:28 PM »
 Gentlemen, I have a bar stock
Ro-Jett .65 that's running perfectly,

but after many hundreds of flights,
it's getting brown and gummy.

It has run exclusively on Powermaster -
Ro-Jett fuel.

  Usually, I would crock pot it in new,
green, antifreeze, but I'm concerned about
pitting the bar stock case or removing any
"good" cylinder varnish.

  Should I just remove and clean the head?

What do you think?

Cheers! - K.

    I would clean it up as well as you could on the outside with various solvents like acetone and lacquer thinner, and leave it alone. The key observation is in bold above.

      It works fine in a crock pot but you don't need any internal cleaning. Mine has many hundreds of flights, too, but it is clean on the outside. Hard for me to see how it got too gunky, assuming you don't get a lot of blow-back from running the pipe too short.


      Brett


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