Sea Doo 3d

[Orange]

I bought a seadoo speedster a few months ago and I'm having lots of fun. So much fun that I am looking at a cheap ski. I noticed you can pick up newer 3Ds for cheap. I know they were cheap when new, but still, $2000 for a 2004 sea doo sounds good.

I want to hear your opinions on power, reliability, etc. I have read they are a little underpowered.

Any opinions on price? The 3d I looked at started right up and looked clean, and of course I would get it checked out by a local machanic.

Thanks

 

[DCKD]

That is a good price. The 3D is not like most of the seadoos you have seen...they are stand up skis. Very unstable and hard to ride...there are different seats you can get for them, but still there is a learning curve. Once you figure it out though they are the most fun thing on the water.

Matt

 

[sporsterjoel]

not sure on perfomane but there are two modles a 3D(110hp) and a 3D DI(130hp) Not sure about all the problems the di's have but im sure other members will chim in, if you dont need the extra power then the regular one witch i think is what you talking about based on it price should be a good machine. Also look at youtube for videos of 3d's they look WAY more stable and easyer to ride then the old stand up jetkis..

 

[Orange]

Anyone know what compression I need to get on a 2004 3D?

 

[evofxdwg]

Anyone know what compression I need to get on a 2004 3D?

I have the ebay manuals but they dont give an absolute compression for the 787RFI engine. (it doesnt have a compression test procedure in it). The spec for compression ratio is 6.0:1 (same for 3D base or DI version). Not sure you can infer anything from that data. I suspect these engines "leak down" pretty quick due to RAVE valve design. But then I have very little experience with these Rotax engines.

 

[evofxdwg]

I want to hear your opinions on power, reliability, etc. I have read they are a little underpowered.

Any opinions on price? The 3d I looked at started right up and looked clean, and of course I would get it checked out by a local machanic.

Thanks

I bought a new 2005 3D base model in late 2007 and am happy with it. Bought it mostly as a first-ever PWC to ride the grandkids around and see if i want to get a bigger one. Gave $2500 + tax (but sold with no warranty) then and had to drive 300 miles to Huntsville to pick up. I did have a problem that turned out to be faulty spark plugs, but ran fine after i finally replaced the new-looking plugs with some fresh ones.

As-purchased it had NO seat at all. I found a new Kart seat kit on ebay and am still looking for the bananna-type seat and a reasonable-priced Shoq pole. The seats are not cheap either and i have never seen the bannana seat KIT on ebay.

If you are athletic/young type you will be able to use it in standup mode. Im just an old big fart so i havent tried standup yet. Its a fun vehicle and the base model goes fast enough for me. Clocked it with GPS at over 60mph straight line and i weigh 265 or so (beyond the spec weight for the thing).

It is stable at any nonzero speed and unstable when sitting still. I havent found a graceful way to get off of it yet. I have dumped myself in the lake a couple of times and been able to reboard in deep water but its tricky. Especially when you have to get on, then your 5 yr old grandson has to get on too!


If i had any complaints, they are minor. The engine cover comes completely off (not fixed hinge) and its kind of unwieldly. There is no storage to speak of - just a little tray - and you have to open the engine cover an keep it from falling off in front. Tricky if you are out on the water and need your cell or something. Also, the winterizing procedure to get anti-freeze in cooling system sucks. I couldnt get the fluid to go in after removing and pinching hoses in the instructions. Had to rig up a gravity feed and wait forever for it to go in. Bombardier says use premium gas and i do. Also, the recommended injection oil is expensive. But it doesnt seem to use very much injection oil at all.

Im a do-it yourselfer so what i REALLY DONT like is that a Bombardier proprietary code scanner is required to pull service codes and running hours.- But their build quality is great. If i dont have problems, good.

Overall, its a fun little toy and i would like to get a new GTX or RXT to go with it.

 

[seadoosnipe]

2004 Compression.....

All the 787 model engines have a compression of 150 psi. If your compression is below about 100, then your getting close to a needed overhaul.

In a compression test, it's not so much how much compression you have (as long as it's over 100) but the difference between the cylinders. If you have 145 on one and 120 on the other, there's a problem. The upper end will need rework...........so, if you get about 15 psi difference between the two, you'll need to look into it.

There are two ways to do compression. The dry and wet test. We usually use the dry test, since the wet test is normally a way to see if there may be leak by in cylinder rings or valves.

Somone can correct me if I'm wrong, but I think all the 2 stroke model Rotax engines have a compression of 150 psi.................:cheers:

 

[Dennis]

Compression

Your close SNIPE,
587, 657, 720, and 787 engines are supposed to have 150 P.S.I
The exception is the 951..... 120 P.S.I is normal for this engine.
DAWG