Unknown part

[Jeff wernick]

Found this at the bottom of the engine well... Any ideas as to what it is or purpose. I am thinking it may be to limit engine vibration?

Thanks in advance

 

[tdonoughue]

Beverage coaster from a UFO that visited the Yamaha plant during your boat's fabrication.

(ok, really, I got nothing...)

 

[drewkaree]

That's the dullest ninja throwing star I've ever seen.

 

[212s]

My truck uses a rubber coupler for the steering which is driven by an electric motor. I heard the engine to jetpump uses a rubber coupler to soften the sudden changes in engine RPM, but have not seen one. This might be one that was dropped during assembly.

 

[jmargo]

2010 Yamaha AR240 HIGH OUTPUT (SXT1800AJ) Jet Unit 2 | Babbitts Online

Shop online for OEM Jet Unit 2 parts that fit your 2010 Yamaha AR240 HIGH OUTPUT (SXT1800AJ), search all our OEM Parts or call at (231)737-4542

www.babbittsonline.com

Its the coupler to the jet drive. You had any work done in there ?

 

[Dixie Highway]

Looks like brand new, never installed. If thendrive has never been apart I’d say they dropped it and just left it there. These boats aren’t built with an abundance of care.

 

[tdonoughue]

More spare parts in the bilge...

 

[Julian]

Yup - rubber shaft coupling part #1 in Jet Unit 2 parts breakdown.

 

[Jeff wernick]

2010 Yamaha AR240 HIGH OUTPUT (SXT1800AJ) Jet Unit 2 | Babbitts Online

Shop online for OEM Jet Unit 2 parts that fit your 2010 Yamaha AR240 HIGH OUTPUT (SXT1800AJ), search all our OEM Parts or call at (231)737-4542

www.babbittsonline.com

Its the coupler to the jet drive. You had any work done in there ?

..just the oil changed back in June

 

[Jeff wernick]

Yup - rubber shaft coupling part #1 in Jet Unit 2 parts breakdown.
View attachment 129319

thats is for sure.....thank you

 

[Beachbummer]

$100 bill...Not bad!!!!

 

[Jeff wernick]

Yup - rubber shaft coupling part #1 in Jet Unit 2 parts breakdown.
View attachment 129319

thanks for the diagram of the part....curious, do you know if it affect the running of the engine as it seem more like a cap than anything else performance wise

 

[Scottintexas]

I would have guessed it was more of a "dampener" to absorb the shock ????
@Canuckjetboater any theory on this parts use as a cover or a cushion ?

If you were worried if it was there I think you could lean down over the engine and feel for it, I "THINK" that part is exposed where the engine meets the shaft.



.

 

[Julian]

thanks for the diagram of the part....curious, do you know if it affect the running of the engine as it seem more like a cap than anything else performance wise

Are you wondering if yours fell out? I am pretty certain that if this were the case that drive train would be A LOT louder. As @Scottintexas said, you might be able to reach down to the coupler and feel for the one that is in place now (I've not studied if that is possible).

But imagine that coupler without that rubber part cushioning the two metal "gears"....it would be loud and clanky.

 

[dgfreeze]

Yeah, unless you have a significant rattle/vibration, that was just dropped in there by the factory, and didn't fall out. That is basically a more complicated version of a lovejoy coupler. It allows a slight degree of misalignment in the shafts, and slightly dampens the driveline. If the rubber were missing, there would have to be some serious clanking, particularly on startup and shutdown. Might even be visible if you look at the rear of the engine, where the coupler is. Pictured is the common, simplistic version designed for just a few horsepower.

 

[Scottintexas]

just as an fyi,
helping with another thread I found this link that has a good picture of that coupling and you can see the rubber cushion, it's normally obscured by the cover,

Ernest Ts $35 DIY Complete Oil Removal System for Yamaha Engines

I’ve always hated leaving 2 + quarts of dirty oil in my 2008 FX HO MR-1 engine after an oil change. Anyhow, I did some research and came up with my own DIY complete oil extraction system. I think this system could be modified to work with any Yamaha engine, but would be the most benefit for the...

greenhulk.net

 

[Jeff wernick]

Yup - rubber shaft coupling part #1 in Jet Unit 2 parts breakdown.
View attachment 129319

just as an fyi,
helping with another thread I found this link that has a good picture of that coupling and you can see the rubber cushion, it's normally obscured by the cover,

Ernest Ts $35 DIY Complete Oil Removal System for Yamaha Engines

I’ve always hated leaving 2 + quarts of dirty oil in my 2008 FX HO MR-1 engine after an oil change. Anyhow, I did some research and came up with my own DIY complete oil extraction system. I think this system could be modified to work with any Yamaha engine, but would be the most benefit for the...

greenhulk.net

Thanks....seems like it just an extra part left in the engine well