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Rotax engine ID.

  • Rockdog2112
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3 months 4 days ago #22329 by Rockdog2112
Rotax engine ID. was created by Rockdog2112
I have a Rotax engine that came with a Quicksilver MX I bought. The engine has no tag on it. The seller claims it's 503. Is there any way to visually confirm that's it's a 503 and not a 447? Thanks.

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  • Dennisr5
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3 months 4 days ago #22330 by Dennisr5
Replied by Dennisr5 on topic Rotax engine ID.
Check the bore. If you use your imagination you can measure it close enough through the exhaust port. 503 is 72mm 477 is 64.5mm I believe
Dennis
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3 months 4 days ago #22331 by Rockdog2112
Replied by Rockdog2112 on topic Rotax engine ID.

Dennisr5 wrote: Check the bore. If you use your imagination you can measure it close enough through the exhaust port. 503 is 72mm 477 is 64.5mm I believe
Dennis


Lol. I've got one hell of an imagination, I was hoping to not pull anything a part. No way to tell by looking at them?

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3 months 4 days ago #22335 by admin
Replied by admin on topic Rotax engine ID.
Post the serial number here - I might be able to tell you from the factory records...

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3 months 4 days ago #22336 by admin
Replied by admin on topic Rotax engine ID.
PS: it's not recommended to purchase any engine that doesn't include THE ENGINE LOGBOOK!

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3 months 4 days ago #22339 by Rockdog2112
Replied by Rockdog2112 on topic Rotax engine ID.

admin wrote: PS: it's not recommended to purchase any engine that doesn't include THE ENGINE LOGBOOK!


It's an ultralight and had no logs or a tag. It was running and was demo'd before a bought it. By demo'd, I mean it was flown in front of me. It seemed like a good purchase and I'm comfortable with it. I was just looking to see if I could confirm it was a 503 to make buying future parts easier.

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3 months 4 days ago #22340 by admin
Replied by admin on topic Rotax engine ID.
Well, you could post some pictures here, or just tell me the serial number. A lot of older engines are not in the factory database, but if it's originally from North America then I can look it up in the archival paper records, which go all the way back to the 1980s...

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3 months 3 days ago #22348 by Rockdog2112
Replied by Rockdog2112 on topic Rotax engine ID.

admin wrote: Well, you could post some pictures here, or just tell me the serial number. A lot of older engines are not in the factory database, but if it's originally from North America then I can look it up in the archival paper records, which go all the way back to the 1980s...


Thanks, I will do that.

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