2001 Seadoo Sportster LE. Just got it!

[Bonmotwang]

I think it's diameter is too large?

I guess the gin didn't work, but he told me it was good gin.

If you can't suck out the oil there isn't enough there? I tried and couldn't, so I added some.

Next time I will try a Mcdonald's straw and flatten it first, but my attempts didn't work.

Just measured the diameter. It is 19mm.


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[Sportster-2001-951C-Stock]

That would be fairly close to the drive shaft groove diameter, maybe that is the clip...

 

[Bonmotwang]

That would be fairly close to the drive shaft groove diameter, maybe that is the clip...

Now I need to find out if another one is in the right place. Lol


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[Bonmotwang]

Got the counterbalance oil plug open. It is full. Oil is clear color on my finger, but dirty inside the hole.

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[Bonmotwang]

First 5ml coming out

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[Bonmotwang]

Found it is hard to get the oil out. So far I got about 12ml out. But if it was overflowing when I opened the plug, it should be at least 40 ml there.
I will wait for a little while to see it comes down.


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[Sportster-2001-951C-Stock]

Now I need to find out if another one is in the right place. Lol


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It's there, no need to check. If it was missing your boat would sink from the water leak. This piece came from the explosion of another Seadoo boat near yours in the factory, probably.

Insert a wire or plastic tie-wrap in the CB oil fill hole to take an oil sample. Maybe it's overfilled, there must be room for oil expansion due to heat. Remove some to 1/2 of gear diameter.

 

[Bonmotwang]

I have taken 12ml out. Do I need to add the pump oil back? Is there a mix problem?


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[Sportster-2001-951C-Stock]

I have taken 12ml out. Do I need to add the pump oil back? Is there a mix problem?


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Can you see any oil inside? I think if you cannot see the oil then I would fill it completely, install the plug loosely by finger tight, and start the engine for 30 secs.

After this, remove screw plug and suck out as much mixed oil as possible.

Then refill to approx 1/2 of gear diameter to allow air space.

 

[Bonmotwang]

Hard to see what is in there. I was using a 4 inch tube fishing around to suck the oil out. Not sure if the tube is able to get to the lowest spot. That was about 1 hour ago. I will give it another try to see if I can get more out. Then I will use the high performance gear oil to do the "wash".

Edit: how to control the "1/2" diameter?

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[Sportster-2001-951C-Stock]

3 goals:
There must be enough oil to lubricate the driven gear teeth (if you can see the oil level, there is probably enough).
There must be some air space to allow for oil expansion due to heat (or else a crankcase leak may develop).
If oil is dirty or contaminated by mixing, then changing it a few times will help to eliminate the contamination.

 

[Bonmotwang]

3 goals:
There must be enough oil to lubricate the driven gear teeth (if you can see the oil level, there is probably enough).
There must be some air space to allow for oil expansion due to heat (or else a crankcase leak may develop).
If oil is dirty or contaminated by mixing, then changing it a few times will help to eliminate the contamination.

With the engine sitting in an angle in to the bilge, is the plug the highest location of the gear? By looking at the drawing, the plug hole is probably the half. ?


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[Sportster-2001-951C-Stock]

Not sure if the tube is able to get to the lowest spot.

Edit: how to control the "1/2" diameter?

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You can measure the length of tube inserted to determine the oil level, the point is there should be some air space to allow for oil expansion. If the oil is more than covering 1/2 of gear it might be okay, I like to see the top of oil if possible but it depends on how far you can insert your tube. If you cannot reach below ~1/2 of the gear then you can say certainly the gear is 1/2 covered by the oil level.

The point is to allow some space for oil expansion, not to fill completely to the top.

 

[Sportster-2001-951C-Stock]

With the engine sitting in an angle in to the bilge, is the plug the highest location of the gear? By looking at the drawing, the plug hole is probably the half. ?


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The center of CB shaft is half of the gear diameter, I think.

 

[Sportster-2001-951C-Stock]

So maybe you're thinking it's impossible to overfill the CB cavity, I guess you may be correct.

 

[Sportster-2001-951C-Stock]

Also, the crankcase seam will be the same as center of the CB shaft. I think this is enough oil, at this level.

 

[Bonmotwang]

947/951 Carb engine counterbalance shaft chamber oil analysis



Trying to find out how to put 40ml motor oil into the counter balance gear chamber when the engine is in an angle.

According to the drawing I made, there is a channel for the oil to pass between the counter balance shaft camber and crank shaft counter by the two gears engaged together.

So is counter balance oil being transferred into the crank shaft chamber when the two gears running at a few thousand RPM?

And the counter balance gear chamber is not air tight because of the channel into the crank shaft chamber.

Also the oil is only good for the needle bearing beside the counter balance gear. What is lubricating the bigger bearings on the other side of the seals?

I am just a little confused here...

Edit: Also the combustion pressure is directly transferred into counter balance chamber too. So the 2 stroke oil/mist got there too. No wonder the oil smells a little like the spark plug .

Another picture showing this:

I added the actually shape of the crank case. In the picture, the oil should go to the left of the gear too, which has a bigger space for the oil.

 

[Bonmotwang]

Found two exhaust screws are missing!!!

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[Bonmotwang]

And now it know why two extra screws are here!

Also the big fat washers i found in the bilge must be for the bracket then. same as the other bracket

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[Sportster-2001-951C-Stock]

The CB chamber is hermetically isolated from the crankcase by the two inner crankshaft seals, oil and gasses cannot pass between these spaces unless at least one of the two inner crankshaft seals is damaged.

Look at the crankshaft assembly diagram and you will see the two inner crankshaft seals.

 

[Sportster-2001-951C-Stock]

Can you provide another photo of the missing exhaust screws, wider view? I want to check mine.

 

[Sportster-2001-951C-Stock]

Trying to find out how to put 40ml motor oil into the counter balance gear chamber when the engine is in an angle.

Turn boat upside down and drain the contents of the CB cavity, or make a guess about the exact volume of oil ?

 

[Bonmotwang]

Can you provide another photo of the missing exhaust screws, wider view? I want to check mine.

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[Bonmotwang]

Found two exhaust screws are missing!!!

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Screws are in. Had to take out the bigger screw on the exhaust pipe first to access one of the screw holes.


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[Bonmotwang]

The CB chamber is hermetically isolated from the crankcase by the two inner crankshaft seals, oil and gasses cannot pass between these spaces unless at least one of the two inner crankshaft seals is damaged.

Look at the crankshaft assembly diagram and you will see the two inner crankshaft seals.

How about the crank shaft gear and counterbalance shaft gear. If they contact, is there a space for oil to pass?


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