Motor reving but i go nowhere

[CollinCountyCab]

Launched for the first time and in lake couldnt get it to move back or forward. Shaft was spining but boat was not. I had to rev it up super high to get it to move....like 4k RPM. Here is a photo of pump. Look bad? Motor is not Super Charged and runs great (i think)

Any advice?

Thanks

 

[CollinCountyCab]

2006 sportster..

 

[CollinCountyCab]

spline that goes into impeller is 100%

 

[LouDoo]

From what I can tell the wear ring looks O.K., the impeller is a little dinged but serviceable, you can clean up the impeller with a dremel or a file. The next thing I would check is the carbon seal.

Lou

 

[CollinCountyCab]

carbon seal.....is it easy to take the entire drive shaft out? Does it pull out from the rear of pump?

 

[LouDoo]

Here's a how-to on the carbon seal.

http://www.seadooforum.com/showthread.php?71248-How-To-carbon-seal-service-and-replacement

Lou

 

[CollinCountyCab]

I will pull it all out tomorrow.....how can I tell if its good? I already have the entire rear pump off. All that is showing is the driveshaft. That ok?
Thanks for your help...

I'm the one with the suzuki gsxr 750 motor installed in this thing. crazy but I got is SUPER CHEAP!

 

[CollinCountyCab]

Here is a photo of driveline...

 

[Coastiejoe]

spline that goes into impeller is 100%

The drive shaft spline fails fairly often. If the wear ring and impeller are good, then it has to be either the drive shaft spline it the carbon seal. You need to pull the shaft to do the carbon seal. I'm thinking this will be your issue.


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[racerxxx]

I'm sure you don't know but when did the previous owner put grease in the zerk fitting on the PTO? I'm gonna go out on a limb and guess never? The slices in the PTO boot are my evidence, it won't hold any grease. The grease pushes the driveshaft back towards the impeller, in turn applying more pressure to the carbon seal. It's also possible that the pto driveshaft end bushing is flattened out or missing all together, again increasing the gap (lessening the tension) on the carbon ring.

 

[CollinCountyCab]

I'm sure you don't know but when did the previous owner put grease in the zerk fitting on the PTO? I'm gonna go out on a limb and guess never? The slices in the PTO boot are my evidence, it won't hold any grease. The grease pushes the driveshaft back towards the impeller, in turn applying more pressure to the carbon seal. It's also possible that the pto driveshaft end bushing is flattened out or missing all together, again increasing the gap (lessening the tension) on the carbon ring.

The rubber boot right next to that zerk is ripped....you can't see it from photo. What am I looking for on a "bad" carbon seal?

 

[Coastiejoe]

Uneven wear or marks that show the collar isn't wearing square. If the collar isn't perfectly square, it needs replaced.


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[CollinCountyCab]

here is what I found today....a bit hard to explain but here i go..the "mating surface" of stainless ring and carbon seal is not perfectly flush and equally round. Imagine putting two same size washers together...it would look like one perfect round circle but thick. My ring and carbon seal is not perfectly round...the seal is a "hair" higher than the stainless ring from a helicopter view. Make sense? Because they are not perfectly pushing together there is a gap on the bottom of the 2. Make sense? Almost as I would have to shim the motor up a hair to have a flat "mating surface." OR......am I worrying about something I shouldn't.

 

[racerxxx]

I did this earlier and never got around to posting it. The engine needs to be aligned. You'll need shims and loosen the mounts to get it there.




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[Coastiejoe]

You can still have a spline issue, but,, you have to do the carbon seal anyways. Pull the shaft and confirm the splines and that the rubber bumper is on the end of the shaft.

As mentioned above, you will need to align the engine. If you are not familiar with this or need the tool to do so, a few of us here have the tool available.

 

[CollinCountyCab]

Is my motor out of align with driveshaft?

Carbon seal and stainless ring are not matching up equally round nor a flat mating surface. See pics....Having a bad cavitation problem. Custom motor install so it could not be aligned properly....thoughts??

2006 Seadoo Sportster

 

[CollinCountyCab]

Here is a picture of the carbon seal surface.....looks good? I've never saw one so I don't know if its good or bad.....

 

[Coastiejoe]

In post number 1, there is a gap on one side as compared to the other. The boot could be causing this, but everything I have ever read and seen states that the collar and seal should fit perfectly together, nice and straight.

Wait for a second opinion on this one,,

If it is off, you will need to align the engine.

 

[CollinCountyCab]

Splines are fine.....no rubber bumpers on either end of shaft. Align motor.....UGHHHH!!! What tool do i need?
I started a new thread for alignment thinking it would be easier.....Maybe not..

 

[Coastiejoe]

It is a Seadoo Engine Alignment tool. Specifically designed for Seadoos.

I bought one that I rent to members at just over cost to me. I'll find the link and post it here. Many own one, see if someone in your area has one that you can borrow. If not, mine is normally available.

http://www.seadooforum.com/showthread.php?69943-Alignment-Tool-Rental. If the tool is going west of Texas, we will need to add $10 to the total cost as the freight goes up from Texas and west.

 

[1983]

Keeping all your questions on the same subject will help us get you an accurate answer quicker as then we will all be in the know on what your overall problem is.

http://www.seadooforum.com/showthread.php?76636-Motor-reving-but-i-go-nowhere

Rob

 

[racerxxx]

If everyone is cool with it I want to merge the two threads. No need to bounce back and forth as we were discussing it in the other one.

 

[racerxxx]

Here is what the bumper should look like, check inside the PTO

 

[racerxxx]

Here is the explosion drawing for the drive assy in the '06 Sportster



#39 is the bumper Part#272000173

 

[racerxxx]

Threads are merged, a link will still be here for a week from the other thread. Thanks.