|
-
POSTING RULES

-
Donate yearly (please).
-
Advertise in here!
-
Today's Posts
|
Insert Pics
|

04-23-2014, 08:28 AM
|
|
|
|
Join Date: Jul 2013
Location: San Diego, California
Posts: 291
|
|
Decalin approved?
Is Decalin approved for Rotax 912 ULS engines?
EBB
|

04-23-2014, 08:53 AM
|
|
|
|
Join Date: May 2008
Location: Friday Harbor, Wa
Posts: 300
|
|
Section 5
__________________
MRT890
120042 RV-12
N112XP
|

04-23-2014, 09:29 AM
|
|
|
|
Join Date: Sep 2013
Location: Tucson, AZ
Posts: 322
|
|
Yes Decalin is okay to use in the Rotax engine. Rotax just doesn't have any real test data to offer.
I highly recommend that if you use 100LL then you should use Decalin religiously.
If you can stay away from 100LL you're far a head of the game. 100LL is damaging because of accumulation over the life of the engine no matter what. Use during cross country's are such a small percentage of most fliers total time over the life of the engine it isn't an issue, but Decalin should be used.
__________________
Roger Lee
Tucson, AZ
|

04-23-2014, 09:46 AM
|
|
|
|
Join Date: Jan 2005
Location: Salem, OR
Posts: 296
|
|
I've been using Decalin (at 1 oz per 10 gallons) and burning nothing but 100LL for over 600 hours in our New Blue RV-12. Lead has not been a problem. But then again, we change oil every 33 hours, purging the system plus removing and cleaning the tank. There is always an accumulation of lead in the tank.
__________________
Mitchell Lock
President Van's Aircraft
|

04-23-2014, 11:10 AM
|
|
|
|
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,820
|
|
Mitch,
I'm curious as to how you know it's not a problem unless you've opened the gearbox to inspect. My understanding is that he gear box and clutch are the parts that most susceptible to damage.
Rich
|

04-23-2014, 01:05 PM
|
|
|
|
Join Date: Sep 2013
Location: Tucson, AZ
Posts: 322
|
|
If you use 100LL you have lead build up. There is no way to get around this. It just becomes a fact of life. There is no way to remove all lead. Decalin just helps reduce it. At 600 hrs. you are supposed to remove the gearbox (spelled out in the Line Maint. manual) and have it cleaned. At about 800 hrs. your gearbox clutch won't work any more because it will be packed with lead. I have seen many, it will be there. The clutch must be dismantled and cleaned to remove the lead. this can only be done at a Rotax distributor. Lead will deposit on pistons, rings, inside the gearbox and valve train parts.
__________________
Roger Lee
Tucson, AZ
|

04-23-2014, 01:11 PM
|
 |
|
|
Join Date: Jan 2005
Posts: 963
|
|
Quote:
Originally Posted by MLock
... we change oil every 33 hours, purging the system plus removing and cleaning the tank. There is always an accumulation of lead in the tank.
|
Mitch do you have a process/pictures of this process?
Thanks,
Bob
__________________
Bob Hassel
NM
Subscription Paid for 2020
Home is where the hanger is...
|

04-23-2014, 05:39 PM
|
 |
|
|
Join Date: Aug 2008
Location: Texas, Fort Worth
Posts: 1,237
|
|
Rotax Webinar tonight at EAA.org!
For those who would like to learn more about their Rotax engines there is an EAA webinar titled, " Care and feeding of your Rotax" tonight at EAA.Org at 7pmct. 
__________________
John
RV12 N1212K
Flying Since June 2010
1020 Hours as of 9/30/2017
Johnrv12@icloud.com
RV14 Wing, arrived and building at Rdog's new Hanger at 16X
S/N 140014
|

04-23-2014, 05:43 PM
|
|
|
|
Join Date: Sep 2013
Location: Tucson, AZ
Posts: 322
|
|
Lead isn't just in the oil. The burning inside the cylinders leaves deposits. The guys who fly at low rpms have far more build up.
__________________
Roger Lee
Tucson, AZ
|

04-24-2014, 05:14 AM
|
|
|
|
Join Date: Jan 2005
Location: Salem, OR
Posts: 296
|
|
Sorry I don't have pictures of the process. A Rotax certified mechanic does just about all the maintenance work on the engine in New Blue. He just does the job with no pictures.
I did have the gearbox rebuilt at Lockwood this past January while at the Sebring Expo. They showed me the interior. There was no excessive lead build up.
__________________
Mitchell Lock
President Van's Aircraft
|
| Thread Tools |
Search this Thread |
|
|
|
| Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -6. The time now is 01:06 AM.
|