Rotax 503 Manufacture Date

Leslie R. Thomas
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1 year 2 months ago #15371 by Leslie R. Thomas

Leslie R. Thomas created the topic: Rotax 503 Manufacture Date

I am looking at buying a used 503; current owner says that it has 80 hours on it, but I am looking for the manufacturer date.

The serial number is M5766941.

Can anyone assist?

TIA

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RotaxOwner Admin
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1 year 2 months ago #15375 by RotaxOwner Admin

RotaxOwner Admin replied the topic: Rotax 503 Manufacturer Date

5766941 is a ROTAX 503 UL FAN produced February 13th, 2004

original factory configuration:
with rewind starter and
starter rope standard
UL-reduction gear box B 2,58
NM - not assembled
with 2 Bing-Carburetors 887823

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Herb Gayheart
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1 year 2 months ago #15383 by Herb Gayheart

Herb Gayheart replied the topic: 503 Manufacture date

I own the 503 mentioned in a previous post...sn 5766941.. also have two others ..one is "run out" and was replaced by above sn engine....its sn is 4839311 supposed 280 to 320 hours..
also have another supposed "low time" 503...sn 4158056.. would like the manufacturing dates and particulars for these two engines....thanks Herb

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RotaxOwner Admin
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1 year 1 month ago #15397 by RotaxOwner Admin

RotaxOwner Admin replied the topic: 503 Manufacture date

4839311 is a ROTAX 503 UL FAN produced 25-May-1998 (no other info is available).

4158056 is a ROTAX 503 UL FAN produced 21-Jun-1993 (no other info is available).

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RotaxOwner Admin
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1 year 1 month ago #15398 by RotaxOwner Admin

RotaxOwner Admin replied the topic: Rotax 503 Manufacture Date

If the previous owner of the engine did not supply a properly filled out log-book, then you are basically holding an 'unknown quantity', and at very least you should assume that all the rubber must be replaced... probably be a good idea to keep an eye on the seals as well, if it has been stored for any length of time...

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Herb Gayheart
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1 year 1 month ago #15458 by Herb Gayheart

Herb Gayheart replied the topic: Rotax 503 Manufacture Date

Thanks for the info...I considered both of them to be cores...though the older one has little wear around the exhaust port...

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Mike
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1 year 1 month ago #15462 by Mike

Mike replied the topic: Rotax 503 Manufacture Date

Could I know when a 503 with S/N: 3346610 was manufactured?

Thanks

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RotaxOwner Admin
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1 year 1 month ago #15477 by RotaxOwner Admin

RotaxOwner Admin replied the topic: Rotax 503 Manufacture Date

3346610 is not in the factory's electronic record system.

We do have paper records going back earlier, but I could not find it in there either.
If 3346610 is the correct number, (not a typo?) then probably it was manufactured before 1985, as we have records of some 335xxxx engines sold in 1985 - and that's about as far back as we go on paper.(We only have North American paper records here)

Are you certain it's a 503 aircraft engine? (Our two stroke records expert thinks that the 334xxxx range might be assigned to snowmobile engines.)

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Tim k
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1 year 3 weeks ago #15646 by Tim k

Tim k replied the topic: Rotax 503 Manufacture Date

I have a 503 I am trying to find the mfg date for.
M5658785

Thank you!

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RotaxOwner Admin
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1 year 2 weeks ago #15670 by RotaxOwner Admin

RotaxOwner Admin replied the topic: Rotax 503 Manufacture Date

5658785 is a ROTAX 503 UL FAN produced 14-Feb-2003

original factory configuration:
with rewind starter and
starter rope standard
UL-reduction gear box B 2,58
NM - not assembled
with 2 Bing-Carburetors 887823

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Craig Fordahl
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8 months 14 hours ago #16737 by Craig Fordahl

Craig Fordahl replied the topic: Rotax 503 Manufacture Date

My 503 S/N is 3764154 would you know the manufacturing date and details at time of build?

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RotaxOwner Admin
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8 months 13 hours ago #16738 by RotaxOwner Admin

RotaxOwner Admin replied the topic: Rotax 503 Manufacture Date

3764154 is a ROTAX 503 UL FAN manufactured 29-Jun-1988 (!!)
(there is no additional information in the factory database)

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tom
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5 months 2 weeks ago #17524 by tom

tom replied the topic: Rotax 503 Manufacture Date

How about serial # 3986639 and 4794003
Rotax 503
anybody.......
Thanks

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tom
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5 months 2 weeks ago #17525 by tom

tom replied the topic: Rotax 503 Manufacture Date

serial #'s 3986639 & 4794003
anybody.........
or is there a site I can go to and look them up myself?
Thanks,
Tom

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RotaxOwner Admin
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5 months 1 week ago #17539 by RotaxOwner Admin

RotaxOwner Admin replied the topic: Rotax 503 Manufacture Date

3986639 is a ROTAX 503 UL FAN produced 25-Mar-1992

4794003 is a ROTAX 503 UL FAN produced 26-Apr-1996

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John Adcock
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3 months 1 week ago #18057 by John Adcock

John Adcock replied the topic: Rotax 503 Manufacture Date

Looking for manufacture date 503 SNs 4839407 and 5171940. Should both be SCDI pull-start.

Thanks in advance!

jda8818

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RotaxOwner Admin
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3 months 1 week ago #18059 by RotaxOwner Admin

RotaxOwner Admin replied the topic: Rotax 503 Manufacture Date

4839407 was produced 27-Jan-1999

Engine Serial Number: 4839407
Engine Type: ROTAX 503 UL FA
Model Number: 305030020

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RotaxOwner Admin
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3 months 1 week ago #18060 by RotaxOwner Admin

RotaxOwner Admin replied the topic: Rotax 503 Manufacture Date

5171940 was produced 19-Mar-1999

Engine Serial Number: 5171940
Engine Type: ROTAX 503 UL FAN
Model Number: 305030010

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leon
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3 months 4 days ago #18073 by leon

leon replied the topic: Rotax 503 Manufacture Date

Hello see this post and was wondering if you could tell me the year of my Rotax 582 sn # 5430421

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RotaxOwner Admin
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3 months 3 days ago #18081 by RotaxOwner Admin

RotaxOwner Admin replied the topic: Rotax 503 Manufacture Date

5430421 was produced 11-Jan-2001

Engine Serial Number: 5430421
Engine Type: ROTAX 582 UL Mod.99
Model Number: 395820010

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