Bought 95 seadoo SP, Clean overall aside from the engine components need to....

[Mizzie]

like the title says, i bought this 95 seadoo, got it for a great price so i dont mind the fact that the engine is in "a million" pieces,, NOT the block, just about everything that attaches to it though.. the engine isnt connected to the drive shaft.. etc etc

Now I'm mechanically inclined, to a limit.. I'm wondering if anyone has a diagram or can point me in the right direction as to where to start.. all wiring is there, everything seems there.. I plan to clean the carbs, what else should i check out.. also what lines go where, HAHA

please help me sort out this mess.. aside from this the seadoo is in real good shape and trailer is great..

glad to be a seadoo owner finally

I'll post pics of the engine tomorrow

 

[stickshift69]

Start by researching pictures of the engine, 580 or 650 will do. There are water hose routing diagrams online as well as wiring... thats pretty strait forward tho on that machine. You will likely have to take the pump out from the back to bolt the engine in.

 

[Mizzie]

Thanks for your reply. I went and got a shop manual from the library that helped a lot but now we have a big problem... This engine won't turn! It's been sitting for 5 years, the guy told me it was rebuilt but that's bs I can't turn the crank AT ALL . I realize a rebuild is in order but is there any way to unseize this, to make piston removal and crank removal easier ? Has anyone ever unsiezed a motor like this? I've heard of unsiezing cars engines but not these...

Please help I knew this deal had to have more of a catch... Fiancée is going to killl me I always buy things and they never run lol oh boy

 

[Mizzie]

I believe it's simply just stuck from years if sitting I'm hopeing the internals are salvageable

 

[stickshift69]

Try lifting the cylinders off, you should be able to with some minor persuasion at most. From there youll be able to split the cases from the bottom to get the crank out!

 

[Mizzie]

Why do I read that splitting the case is a pain and expensive, what's involved in resealing?

Is it possible I have a stuck ring or piston from sitting? Would a pb blaster soak do anything? I'm so upset right now I can't believe I got screwed on yet another thing I try and do nice so my kids and I can have some fun. Quads pocket bikes they all screw me lol

 

[seadooya]

if the pistons are stuck, you aint gonna remove the cylinders...lol

Mizzie, remove the spark plugs, and pour some tranning fluid down inside, and let sit for a day or 2. You may want to remove the pump assy as well, since a siezed bearing in there, will not allow the crank to turn.

 

[Mizzie]

Thanks for your reply.. Maybe a dumb question but, what is tranning fluid?

I have the clymer seadoo 88-96 shop manual I was very happy to find out my library had it. I've been reading all night wish this engine wasn't stuck because aside from this problem this book along with the forum could have this little seadoo hitting the waves in no time... Lol

Now would I be better off spraying that tranning fluid stuff through the plug holes or would taking the head off and blasting the piston up close be better?

Thanks for the info so far! I'm nervous but maybe I can get this thing turning with help from you guys.

-Mike

 

[Mizzie]

You may want to remove the pump assy as well, since a siezed bearing in there, will not allow the crank to turn.

p.s.
are you reffering to the jet/water pump assembly or the oil pump assembly? The motor is sitting on my bench in the garage so I'm hopeing you mean oil pump might be the problem! That would be alot better than a stuck piston lol

also while looking at the oil pump I noticed something weird... This only has a single carb... Every 587 I looked at online looked to have dual carbs.. Is this possible on a 95 or is this an older motor (wouldn't be surprised given the surprises thus far) lol oh well the jetski is a messsss but it'll keep me busy on my days off untill fishing season starts again lol

 

[shakedown]

If you have a 95 SP (5873) it was factory with one carb. Do what "seadooya" said pull the plugs and pour some transmission fluid into the cylinders to help free up the rings

 

[shakedown]

he means the jet pump bearings "not" the oil pump

 

[Mizzie]

Thanks for your reply! Ohhh so he means transmission fluid? haha my mistake. I actually remember when I used to work at Fed-Ex we used to mix half ATF half acetone to free up frozen overhead door motors/bolts in the warehouse and it used to work a LOT better than wd-40 and pb blaster... would atf/acetone be a bad combo for a seadoo engine?

The jet pump bearings wouldnt be in the engine case if i understand these things correctly right? the shaft is already removed and the engine is sitting in my garage.. So I guess it's not the bearings unfortunately... :willy_nilly:

 

[stickshift69]

Splitting the cases is not expensive if you do it yourself, 2 crank seals (ones on the end of the crank) should be all you need. You will get to see the condition of the crank bearings by doing this. Chances are your stuck engine will require some new bearings.

 

[Mizzie]

Today was almost 70º here in RI which after 4days of 40º and flooding rains was a nice break! so I got a full day to rip the block apart today... Oh boy is all I can say.. let me upload the pictures check back in a few minutes!

 

[Mizzie]

So I got started today.. I can definetly see now that I got BSed big time by the last owner.. This engine was NEVER rebuilt, The reason I assume this is because of the fact that all the bolts I removed on the starter, oil pump/rotarty valve case etc. were all still paint sealed/covered.. Unless the block was re-painted sometime in it's life, this thing was never taken apart (aside from the head, will explain how Ii know this later on in the pics)..

So I can also notice another thing, The old owner told me this was a "freshwater ski it's whole life, with salterwater use once or twice" When I removed the rotory valve case, a handfull of beach sand came out.. when I opened up the head, there was more sand than most RI beaches.. So what my assumption is, someone ran this in shallow water, sucked up a crapload of sand and never flushed the engine after use... took it out some more, untill the sand finally siezed the engine up.. I don't know if this IS what happened, but i'm sure it's a contributing factor

Pictures below... they are big so sorry if anyone has a slow connection. I broke out the dig camera rather than the phone camera, wanted you guys to really see whats going on here!

When I started, took the head off.. some sand, but so far so good...

So after this, I inspect the pistons... Here, you can see some small marks in the top of the piston that (to me) look like someone tried to beat on the pistons to un-seize them, probably making it worse... it's not too bad it looks like they started doing it and then realized how unsmart they were being, after damaging the surface of the piston..

and yea theres some nasty sludge in there, another sign that they never took care of this poor engine.. seeing this neglect makes me want to save the engine even more.

 

[Mizzie]

So here's some more laughs for you guys haha...

I take off the carb/oil pump/rotary valve assembly... Looks like they were collecting sand? :rofl:

I tried to take off the cylinders, I took off the 4 bolts on the sides of the piston, but it didnt want to budge, I was going to wack it with a rubber mallet but I was thinking it would probably do more harm than good as the piston is stuck anyways....So instead I used a 150psi large capacity tank compressor and blasted out as much sand as I could... my garage floor looks like a beach now! I'm sure theres much more in the crankcase..

I air blasted the carb,pump & head, gave them a quick water rinse, soaked them in WD-40+PB Blaster and set them out to dry..

As for the engine, I mixed up some tranny fluid and acetone 50/50mix (mixed up qt of tranny fluid, with a qt of acetone) clogged up anywhere it could leak out and poured it on the pistons... it's outside soaking, I tried to pour some in the engine crankcase via the rotorvalve holes but it kept pouring out... is there a bolt i can remove that i can fill the crankcase with this mixture?

Thats about where i'm at now, going to let the engine soak overnight, maybe with a little luck it will free up the piston.. but i'm sure theres a pount of sand in the crankcase anyways so I guess i'll probably split the case tomorrow, any suggestions? should I split the case myself and Can I split the case with the pistons stuck?

Thanks so far for the help, I wouldn't have been able to do what I've got done so far without everyones help... Greatly appreciated, hopefully this thread can end on a good note sooner or later!

Thanks again,
Mike

 

[shakedown]

Wow mike good pics, I sent you a private message. I dont know how that much sand got in the intake like that, my guess is someone must not have liked the person you bought that from and put sand down the carbs. thats bad!!!!!

 

[shakedown]

you have the MIKUNI BN-38 carb, you'll need to know that when you go to get the carb kit.

 

[Mizzie]

Thanks for the info, Big help! check your PMs also.

 

[stickshift69]

All I can say is WOW... Ill stay on my fresh water lakes. Just have to wait a month till the 3 feet of ice out on the lake turns into water again. Never seen the inside of an engine look like that

 

[Mizzie]

yeaa I know man it's bad news! saltwater is no good! I have plenty of lakes around me, I have no Idea why the one jetski I buy has to be a saltwater veteran! I'm so upset I haven't figured out how to tell my fiancee it's seized yet, haha she's very cool and understanding and happy about the jetski but this would be the second thing in a row I bought that never ran (bought a 90cc quad for my little girl before that supposably needed a carb cleaning/battery, long story short, it wasnt siezed but still needed a hell of a rebuild!) So hopefully I can secretly get some rebuild parts and get this thing turning hahaha.

I have tomorrow and Friday off so Hopefully I can figure out how to get these cylinders off the heads and find a cheap rebuild kid.

Thanks a bunch so far guys, Thank god for the internet/forums! This computer is probably my only GOOD investment aside from my rv haha thanks

-Mike

 

[stickshift69]

I think your internal (crank/pistons) sand and corrosion has nothing to do with salt water use. Thats mostle from sitting. Or possibly it was sunk the last time it was ran then sat and rusted for a while. My freshwater machines have some corrosion in the water jackets as well!

 

[voodoo]

The sand really could have come from fresh water beaching and lack of flushing, but you have been fleeced about responsible ownership - inspect the outboard peices because a SBT motor is in your near future - it looks like your sliding parts have been neglected and the rotating parts below the piston deck will surely look as bad from lack of winterizing oil coatings. Make sure the pump itself has oil in the cone, it was designed to be submerged in water and may be fine - the single carb is not a bad thing even if it did come with duel carbs, the single will be easier for a beginner to take care of and the lack of speed is just a few, you are a long way from getting in the water from these pictures - do you have a freind with this version ski you could swap the electrical box and see if it works before you invest 1000 to find this out? The mechanical stuff is easy to fix with money but the obsolete electronics will make an anchor out of the best prepared repair job.

 

[stickshift69]

You can still find electrical boxes on ebay once in a while. They go for around 200.00

 

[Mizzie]

Thanks for the info! well no I dont have a friend with this seadoo, Only buddys I have with a jetski one has a old school sitdown yamaha waverunner and other has a set of New (06-09) seadoo dont even know the model I know they're gold and black and pretty damn fast LOL. but He takes them right to the dealer for repairs so he's not any help lol.

You guys are scareing me LOL so if my block itself even salvagable? I can't see myself buying a whole new engine definetly can't afford that at the moment, a rebuild is a differant story.. If this block is shot I guess the jetski is going... unless I can find a good cheap engine. It looks nice, on the outside! :rofl: