96 XP Heavy Smoke at Start-up

[robin savell lloyd]

I think we are getting off the subject!!!!!!!!!!!!
I meant the fittings where the oil sprays into your engine. They are a ball valve with a spring and can stick.
That can allow oil to siphon into the motor while sitting.
Crank seals (inner) could be leaking but they normally drain pretty quick and the motor wont turn over with the plugs in. (hyro lock)
Good luck. hard to say without seeing.
What colour are your plugs?

I do not know if you are refering to banjo fiting. but anyways I do not think that the 1997 oil injection has them as they are found on older ski's :cheers:

 

[jcsign]

12nvy...Thanks

Sorry, but there is still snow on the ground here so I havn't done much with the jetski as far as running it. I appreciate your reply, but will not be able to check it out until Spring.

Where is the ball valve and spring located? Do you need to remove the rotary valve assembly to get access to it? Just curious. Your point seems logical if it would cause the oil to siphon into the motor after standing.

 

[Deco]

I would like to see SBT pictures.

What does there warranty consist of? Is it BS?

 

[12nvy]

The fittings are in the intake manifold mate. Just follow your oil lines to the motor.
My inner crank seals leaked. The motor wont turn over with the plugs in, as it causes a hydro lock.
Good luck with the snow, In Oz I ski all year round

 

[jcsign]

12nvy - Think I have your problem

12nvy, I have been using the jetski (96 XP) all summer but it is difficult to start after it sits for a week or two. It won't crank even with a fully charged battery. I need to pull the spark plugs out and crank to get oil out of the cylinders (PTO cylinder is worse). Afterward, I can crank with plugs in and she starts. Appears hydro-locked with oil that bleeds into the cylinders. Sounds like your same problem with bad inner crank seals. If so, it will require a complete rebuild. I think I will hold off for the summer. Can you think of anything else that would do this? Someone mentioned check valves at the intake manifold where the oil lines connect. I just replaced both oil lines and I did not see any check valve at the intake manifold connection. Others mentioned the RV seal. Is this also a possibility? I hate to tear the engine completly down if there is an external fix that I can do.

My son just got back from a 17 day trip to Australia. He went with a group of High School students as a Student Ambassador with a group called People to People. He was in the South and North parts of the country and absolutely loved it there. He plans to go back someday (I hope he takes me with him).

Thanks for any input you can offer.

 

[blackdog98]

Mine is doing the same but i'm blowing oil out of the exhaust at an alarming rate. Run great but then builds up oil in the cylinders after sitting and I'm losing oil from the tank too. smokes constantly too. i am premixing btw. i would love to hear your thoughts. help!!

 

[jcsign]

Interesting Observation-Any thoughts?

This weekend I could not start the 96 XP again after sitting for a week. Won't crank, appeared hydrolocked. Took out the plugs, cranked it, shot starting fluuid in the cylinders, put plugs in and she started.

After it ran for 10-15 seconds, I pulled out the plugs. I noticed puffs of smoke slowly coming out of the MAG side spark plug hole. It appeared to be oil burning off in the cylinder. You could watch it pulse puffs of smoke as if oil was slowly dripping into the combustion chamber. Now it was obvious to me that after I shut it down, each time oit continues to drip from somewhere into the combustion chamber of the MAG cylinder.

I have never torn one of these 2 cycle engines down. I am very knowledgeable of 4 cycles. Any ideas of what, or where the oil could be dripping from into the combustion chamber? Can the rotary valve system in any way have a bad seal to do this? What are the entry points for oil into the cylinder? I always thought the only oil entry point was via the mixture entering at the intake manifold. Everyone mentions a potential internal crankshaft seal leaking. I do not understand how a crankshaft seal can allow oil to enter the combustion chamber. Again, I am a 4 cycle guy.

Any help in explaining the lubrication system and potential oil entry points would be appreciated.

 

[jayman63]

any luck with this? having the same exact problem with my 96 hx and i am about to start taking it apart, just wondering if you had any more info

 

[jcsign]

jayman63 reply

jayman63, I have not had any success to date. It is stored for the winter. I think I am going to just go through the ritual of pumping the oil out of the cylinders after it sits for awhile. I figure it is easier and cheaper than tearing down the engine now. I am going to wait until a 'major' problem occurs with the engine and then deal with it at that time.

Sorry, wish I could of helped you with better information.

 

[voodoo]

If you want to see the inner seals that allow oil to reach the combustion section take a look at seadoo snipe 787 engine project pictures, in the crankshaft area you will see where seals are on the crank that hold oil away from the con-rod area, all the seadoo engines have this, I do not know how a person can replace these and other rotating bearings, I had my 657 apart last year and I put everything back the way I found it with no smoke - it did not smoke to begin with but a 95 OEM motor made me curious, I did a top-end and so far all is well. This winter I got a boat with 787 and I can see all the balls lined up together so I know I need new ones but am thinking this requires a press to replace main bearings and these seals would make sense - I hear about welding but I wonder how can you weld and not distort the rubber seal surfaces? One of the mechanics will chime in and offer some guidance I hope, I am refrigeration and mechanical service guy but this looks out of my league.

 

[IDoSeaDoo]

Mine smokes too,and won't run in the water

I agree. Other than Pro-X pistons in some instances, I only use OEM parts on my customers engines. I've been a full time PWC Technician for 15 years now. I had my own shop (The Jet Factory of Canada) for 11 years, I worked for a Sea-Doo dealer for a year, and for the last 3 years I've been working as a mobile PWC tech. In 15 years, against my recommendations, I have installed 4 SBT engines only when the customer absolutely insisted on it. I make them deal with getting the engine from SBT and sending the old one back. I also make it very clear that if the SBT engine blows, they pay me again to do the work over. In one example, a couple of years ago, I replaced 2 engines in a Speedster with SBT engines. After 20 minutes, one engine failed. I diagnosed it and found the rotary valve not turning. The brass gear stripped. I imagine that a bent rotary shaft was used in the SBT rebuild.
I got paid twice for that job and the customers Speedster was down for over 3 weeks in the Summer.

Chester

Chester, I would love for you to give me some advice on my current problem. I am new to this forum and have made my first post today. My ski is also smoking quite a bit on startup. I don't know what the problem is, just know that it's not the rotary valve.
All help would be EXTREMELY appreciated.

thanks,
Andrew