Rotax 503 Manufacture Date

tsoftware
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2 years 3 weeks ago #15371 by tsoftware

Rotax 503 Manufacture Date was created by tsoftware

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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admin
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2 years 3 weeks ago #15375 by admin

Replied by admin on topic Rotax 503 Manufacture 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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herbgh
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2 years 3 weeks ago #15383 by herbgh

Replied by herbgh on topic Rotax 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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admin
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2 years 3 weeks ago #15397 by admin

Replied by admin on topic Rotax 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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admin
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2 years 3 weeks ago #15398 by admin

Replied by admin on 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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herbgh
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2 years 2 weeks ago #15458 by herbgh

Replied by herbgh on 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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flamespirit919
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2 years 2 weeks ago #15462 by flamespirit919

Replied by flamespirit919 on topic Rotax 503 Manufacture Date

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

Thanks

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admin
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2 years 2 weeks ago #15477 by admin

Replied by admin on 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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harley1
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1 year 11 months ago #15646 by harley1

Replied by harley1 on 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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admin
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1 year 11 months ago #15670 by admin

Replied by admin on 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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ca4dahl
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1 year 6 months ago #16737 by ca4dahl

Replied by ca4dahl on 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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admin
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1 year 6 months ago #16738 by admin

Replied by admin on 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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vx5490
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1 year 4 months ago #17524 by vx5490

Replied by vx5490 on topic Rotax 503 Manufacture Date

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

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vx5490
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1 year 4 months ago #17525 by vx5490

Replied by vx5490 on 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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admin
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1 year 4 months ago #17539 by admin

Replied by admin on 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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jda8818
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1 year 2 months ago #18057 by jda8818

Replied by jda8818 on 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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admin
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1 year 2 months ago #18059 by admin

Replied by admin on 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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admin
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1 year 2 months ago #18060 by admin

Replied by admin on 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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n2theheat
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1 year 1 month ago #18073 by n2theheat

Replied by n2theheat on 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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admin
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1 year 1 month ago #18081 by admin

Replied by admin on 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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