- Location
- New Brunswick, Canada
Anybody know what this black ruber build up is on a SBT reman crank for a superjet is? I understand using a bit of bearing retainer, but this seems wrong??? 
SBT Crank OK?
- Thread starter Explorer-Boats.com
- Start date
Jcary85
Site Supporter
- Location
- Glenmoore pa
There’s a sleeve over the end of the crank right there. I believe it’s just the sealant/adhesive that holds it in place
- Location
- Asheville, NC
Space age technology
long beach local
long beach local
- Location
- Az
I believe there is an o ring that is supposed to be there.
long beach local
long beach local
- Location
- Az
Wait a minute on second thought the o ring is between the coupler and the collar (sleeve) right ? Maybe someone put it there by accident and that’s what was left over. I have put motors together without the o ring and they ran fine idk
Jcary85
Site Supporter
- Location
- Glenmoore pa
see this thread for info about the crank sleeve. Jr. references sleeve retaining compound - I'm betting that's what you are seeing. https://www.x-h2o.com/threads/dasa-crankshaft.201649/
- Location
- California
It's a Redi-Sleeve to fix a damaged crank seal surface. The crank was damaged before they rebuilt it and this is how they fixed the seal surface. Probably just sealant.
Redi-Sleeves
Timken offers Redi-Sleeves, which are precision stainless steel wear sleeves designed to be pressed onto a shaft for an enhanced sealing surface. Redi-Sleeves are fast, inexpensive repair options for grooved or worn shafts.Design Attributes
- Timken’s line of Redi-Sleeves feature a strong, durable stainless-steel construction that helps create a corrosion-free sealing surface that may surpass original shaft specifications
- Redi-Sleeves have an ultra-thin construction of 0.25mm (0.1″) that allows the original seal size to be used with minimal additional lip loading
Applications
- Redi-Sleeves can be used on a full range of industrial equipment
It sure looks to me like this is an oem part on all cranks, not a redi sleeve to fix damage.
Is that not what everybody above in this thread is saying, and also what is shown on Yamaha parts fiche?
- Location
- California
I have an OEM crank I'll check when I get home. In the OP picture you can clearly see the sleeve and sealant and is not part of the as-cast crank.
I honestly don't know if Yamaha installs these on OEM cranks or not but other OEM's don't. Others like Kawasaki and Seadoo either run a seal directly on the machined iron surface or have a large sleeve sealed with an o-ring.
Yamaha shows a #4 Sleeve but it looks thick.
Last edited:
- Location
- Granbury, TX
Kawasaki uses a sleeve as well in the exact same spot...
- Location
- California
Correct as I said. But they are much thicker than the one in the OP's picture.
There's also the chance I am wrong on the Yamaha crank, LOL. Sure looked like a redi-sleeve and been a little while since I had mine apart.
Maybe SBT just installs the #4 "Sleeve" for you?
- Location
- New Brunswick, Canada
I didn’t notice it on the original crank before I sent it out for rebuild. Obviously it was there. This one is back in the motor now. Just waiting another 6 months for a b-pipe
