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Hey guys,

I need replacement parts to rebuild a sousaphone (valves, neck and bits, a water key) but the repair shops I tried couldn't identify this sousa model for sure, so they couldn't order them. I thought some of the experts here could surely identify it. I was told it's a Yamaha, but there isn't a Yamaha logo anywhere, so it might be wrong, though the hug shape looks like Yamahas, and so does the silver and laquer coloring of the valve section pipes. The serial number is 318xxx, which seems to make everybody around here confused.

Thanks!

Sure looks like Yamaha (or even possibly a Bachmaha) to me. The ferrules, the angle of the lower lead pipe, the serial number itself...all look like a Yamaha. Yamaha hasn't always been great with keeping track of serial numbers, but, I think it's new enough to be a YSH-411. You can find schematics on the Yamaha parts site.

https://parts-search.yamaha.co.jp/html/ ... _id=105557

Thanks!
Is there a way to tell if it's an older model, some signs to look for? Wouldn't want to order parts only to find out they won't fit...

Udi wrote: ↑Tue Jul 06, 2021 12:59 am Thanks!
Is there a way to tell if it's an older model, some signs to look for? Wouldn't want to order parts only to find out they won't fit...

Here's the serial number list from the same site:
https://parts-search.yamaha.co.jp/html/ ... 2_010&sc=0
I'd presume it's a 411 based on what I think I can see on the second valve in your photo.

Thank you very much, that's very helpful, I appreciate it.