Huge Power Loss

[AboveTheBest]

Since the original picture I removed the wear ring bolts and the impeller is not stuck there like I originally thought, the shaft is actually stuck in the intermediate housing.

The impeller is still attached to the shaft, and it is separating from the pump.

At this point I’m going to find a way to get the shaft and pump out before I head back home so I can rebuild that portion and figure out what actually went wrong.

The fact that the shaft is stuck makes me think the problem lies somewhere inside the intermediate housing.

 

[swatski]

Since the original picture I removed the wear ring bolts and the impeller is not stuck there like I originally thought, the shaft is actually stuck in the intermediate housing.

The impeller is still attached to the shaft, and it is separating from the pump.

At this point I’m going to find a way to get the shaft and pump out before I head back home so I can rebuild that portion and figure out what actually went wrong.

The fact that the shaft is stuck makes me think the problem lies somewhere inside the intermediate housing.

That could be but the impeller and shaft separating from the stator/bearing assembly segment is not normal.
You may be able to tell if there was any evidence of water intrusion into the final bearing assembly. My thinking is - is the shaft stuck in the intermediate bearing as a result of final bearing assembly failure? I guess seeing what's up with the shaft splines could also be telling?
Damn.

--

 

[Bruce]

@Big Shasta had to use a car to pull one of his out....

https://jetboaters.net/threads/impeller-bearings-trashed-lots-of-rebuild-pics-pg-6.2822/page-4

The text is still there but the pictures and video are gone. The entire thread will likely be helpful.

 

[Scottintexas]

@AboveTheBest where are you at on vacation?,

maybe there is a member by that could help you or maybe they could even give your family an afternoon of boating fun to help turn it into a good memory! I'm sure those 5 kids would appreciate it!


.

 

[AboveTheBest]

@Scottintexas We rented a house on a Cedar Lake in Indiana because it was central for everyone.
It looks like the rest of the week is full of rain anyway, so it turns out it wasn’t such a big deal that the boat died yesterday (at least that’s what I’m telling myself).

 

[txav8r]

@AboveTheBest , the bearings in the intermediate housing are sealed. The reason to add grease to the housing is to waterproof the housing from water intrusion. Any chance this housing either lacks that grease or was ever overfilled? Those are the reasons for the ambiguous wording in the manual, but the only negative I have ever read is that someone overfilled and it forced the seal to unseat. Just a thought and hoping that you can reassemble and get it back running again soon!

 

[AboveTheBest]

Water intrusion is my guess, since I just cleaned the engine compartment last week.

 

[boudin]

The grease in the housing is separate. The splines are stuck inside the shaft. Once he gets them apart, you can put grease on the splines before reassembling. Take a look at the diagrams on partzilla.com.

-Greg

 

[swatski]

Water intrusion is my guess, since I just cleaned the engine compartment last week.

Final/pump bearing? or the intermediate?
I would think the intermediate bearing failure (which is sealed inside a housing/case) would cause water intrusion into the hull.
Maybe water intrusion into the final bearing assembly caused it to seize and then the coupler shaft stripped/bent the impeller shaft splines inside the intermediate bearing housing?

(I'm trying to find time to read @Big Shasta thread that @Bruce reposted - could really be helpful)

--

 

[Speedling]

@Scottintexas We rented a house on a Cedar Lake in Indiana because it was central for everyone.
It looks like the rest of the week is full of rain anyway, so it turns out it wasn’t such a big deal that the boat died yesterday (at least that’s what I’m telling myself).

Send me your number via pm asap.
I work until 10 pm but will try to sneak out for a call.
Don't know how I actually managed to miss a thread but I have been pretty busy waking up at 4 a.m. and not getting home till 11 p.m. every day for the last month but I do live in Cedar Lake so I'll give you a hand if I can

 

[Speedling]

Called and left you a mesage. Feel free to text me too as i can usually respond quicker.
How long you in cedar tucky?

 

[AboveTheBest]

We’re just here throughout Saturday, I sent you another PM.

 

[swatski]

We’re just here throughout Saturday, I sent you another PM.

Man, I would take @Speedling up on that in a nanosecond. Even just for initial diagnostics.
Speed is the author of the JB.net bestseller "The Manual of Throttle Assembly Adjustment" for Yamaha jet boats, widely circulated and cited throughout both this forum, and the dark site!

--

 

[AboveTheBest]

This is hard to believe, but @Speedling just came over to my rental at 10:30pm, in the rain, to take a look at my injured 190.

He confirmed that we hadn’t done anything wrong and that the shaft is for some reason stuck in the intermediate housing. I’ll take a shot at pounding it out and then figure out what’s wrong after I get it out.

If you see Speedling at Bimini this year make sure to buy him a beer.

Thanks again bud, and safe travels on your trip down South.

 

[Speedling]

You may want to take off that cone you have on there just to see what's going on with the shaft on that end.
For forum information: it appeared the shaft and bearing started seperating there but it could be due to trying to pull the shaft from the intermediate housing.
At that point i must defer to others because i haven't messed with the intermediate bearing other than when i slid the motors to it on the exciter, and greasing them.
That shaft is like really stuck and i hope it would come free before breaking other things on the intermediate housing.

 

[Speedling]

Oh and btw, go to lighthouse and get a couple top shelf long islands, the crab dip, and if they have the swordfish, get that too.

 

[Murf'n'surf]

I had to use a metal bar and a 5 pound sledge to knock my shaft out of the bearing splines. I tried beating on wood between the hammer and impeller but it stopped too much of the shock and made me switch to a metal rod to hit. Grease those splines up well when you reassemble.

 

[4x15mph]

Yes, I also had to pry and it wasn't until I used a longer pry bar that I got the leverage needed.

You should use Yamaha's Molybdenum Disulfide Grease on the splines when putting it back together

 

[AboveTheBest]

@Murf'n'surf I have a 5lb mini sledge and a 2' piece of black metal pipe waiting to bang the shaft out as soon as the rain lets up.

Once I get the shaft out I will start disassembling things to find the failure. I'm really hoping the problem is with the final bearing like @swatski suggested, because I'm not too keen on being the forums guinea pig for rebuilding the intermediate housing...

 

[boudin]

So far I've not seen a reason to believe there is anything wrong with your intermediate housing or intermediate shaft. Is it leaking inside the boat? What you have is some rust in the splines that is preventing them from easily separating--that's not unusual.

Bolt up the pump again to the wear ring, but leave the wear ring unbolted from the transom housing. You can then use a pry bar between the transom housing and the wear ring to separate the pump/driveshaft from the boat.

Sometimes this requires removing the ride plate to get better leverage (with waverunners). Sometimes you can also use longer pry bar.

It looks like the 190 HO has a 2" spacer between the wear ring and the transom plate. You would be using the pry bar on that spacer.

All of this assumes the nut inside the cone be secured to the driveshaft. There seemed to be some question as to whether that was the case with your boat.

Upload some pictures when you have time.

-Greg