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RESTO 94 XP and 94 SPI restoration

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chamilton89

chamilton89

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Hey guys, I love reading all the threads and I have really enjoyed working on my 93 SPX. I have an awesome opportunity to grab a 94 SPI and a 94 XP both which have sat for about 5 years and a double trailer for 700 bucks. I went to look at them yesterday and neither has a battery so I couldn't test the electrics but what terrifies me is I couldn't spin the PTO on either of them with the plugs out. Both had the same symptoms. I could "rock" the PTO side to side just a bit and the pistons look to move a bit from a visual check but it almost feels like they are both stuck on the starter motors. It sound like its hitting metal as I try and rock the PTO. Is this something that sounds common from a Doo sitting for a few years? Any thoughts would be greatly appreciated as I want to jump on this asap! Thank you guys.
 
Chances are the rings are seized. Pour ATF fluid into the cylinders and let it sit. Just keep rocking it back and forth. Once (if) they break free, the rust ring will normally wear off with use.


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Bottom line, you MUST buy these as if the engines are junk. Only way to look at them.


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If, like me, you like to tinker and have the room to work on them I would say you would be purchasing the trailer and the skis are just extra ballast at this point; depending on the trailer condition, wave 4-5 c-notes to take the package away. You may get lucky and be able to find a simple reason for lock-up (maybe 10% chance).

Or take the battery out of your spx to test with the skis.

Yes, common to have frozen engine if not properly prepared (fogged) after last run; pumps will occasionally freeze too.

Again, if you like to work on them because you will need to clean up the entire fuel system if you get them.

Yes, I got a couple of these cases of frozen engines to deal with.

If you do get them and get them to turn over freely, check compression, clean out carb, test starting with external supply of premix (40:1) before diving into anything else.

Good luck and have fun

Rod
 
Fair enough. I think I might roll the dice and see what happens. Just disappointed that it may not be something simple.


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Guess just hard to believe they would both be completely locked up after just a few years of sitting.


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chamilton89 said:
Guess just hard to believe they would both be completely locked up after just a few years of sitting.


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Rust does not take long to set in. I had an old engine block outside for less than a month "was turning into a coffee table" and it had surface rust on the inside of the cylinders.
 
Yeah fair enough. He said they were winterized before they were put up and I guess with the metallic noise I thought it could just be the starter or something silly that was jammed that was interfering.


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chamilton89 said:
Yeah fair enough. He said they were winterized before they were put up and I guess with the metallic noise I thought it could just be the starter or something silly that was jammed that was interfering.


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Starter is usually only a couple bolts right? Might be worth popping it off then trying to turn by hand. That is if its close to you and they let you try it before buying. On my own ski/different model the started was rusted to hell and I did properly winterize the ski. I replaced it & it turned over fine but the ends/spring was covered in rust.
 
Yeah I suppose you're right, may be worth a look. Disappointed I'm not missing anything easy haha. I think I'm going to go for it. If the pistons are seized, could I get away with a top end rebuild?
 
chamilton89 said:
Yeah I suppose you're right, may be worth a look. Disappointed I'm not missing anything easy haha. I think I'm going to go for it. If the pistons are seized, could I get away with a top end rebuild?
Click to expand...

I think most people would say if you are pulling a motor because its seized and its an un-known engine that you should pull everything for inspection first. Would suck to rebuild just the top end and have an issue elsewhere. Just my 2 cents but ill let the more knowledgeable people speak up :)
 
Well thanks again for all he insight. I bough them. $650 and I couldn't pass it up. Figure I could part it out for more than that if all hell breaks loose.
 
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Absolutely. I guess this is going to turn into another build thread, get excited. Here is the picture I have from online. I will have them in my hands this weekend.
 
Yeah. I mean. Ehh. I don't think i would sink money into restoring those skis. They aren't really desirable or fast. That trailer looks pretty rough as well...have you paid the guy yet? I'm wondering if $650 is a better deal for him or you at this point...
 
Well thanks for the words of encouragement! lol Im excited anyway. I went to school for engineering and now I'm in sales so I always have to have something to tinker with.
 
Probably corroded iron cylinder liners and maybe even crankshaft bearings, oiling all of these early and often keeps this damage to a minimum. The CORRECT way is to disassemble the top end and lightly hone the cylinders if they're rusted.

I like to live dangerously so soaking cylinders in ATF and/or two-stroke oil and working the crank back and forth till they free up might work but beware if the bearings are rusted things can fly apart in a hurry and leave new windows in the $$ engine cases.
 
If you're going to keep them and ride them, RESTORE those bad boys! Just don't be afraid to be upside down in them. You will have a fun set of skis to play on



95 XP800!!!
Keep the 2 strokes alive!
 
It's a hobby and not s business for me. It's what I love to do and I'm excited to get my hands on them. First things first is to free everything. Could even be a locked up pump so those will be removed first thing.


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Alright, so picked them up today. The engines are for sure not seized as the pistons do move ever so slightly. They both however have the same symptoms. It is surely metal on metal and it sounds like it is coming from the intake/rotary valve area. Its a solid thud, not like a rubbing but a hard stop. Not sure I'm going to tear apart the intake tonight on the XP, but any thoughts at all?
 
Ugh. It sounds like the solid click/thud I had. And that's exactly one point of failure, was the rotary valve.. Just seems odd that it would happen to BOTH of them..


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You may get lucky! Seized/locked up pumps from sitting and/or surface rust coating inside cylinder walls, that I'm told will wear away with normal use.. Can't hurt to pull the plugs, fog/lube the hell outta the cylinders, and then try moving it slowly..(the pto),,, if no go, try removing the pump and them moving the pto, if no go, then I'd say remove the starter and try moving the pto... Or do that in any order.. You've got nothing to lose as those motors need to be pulled anyway.. Take PICS SO WE CAN SEE THE SITUATION!!


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You got it. I'll
Tear into the 657x tomorrow and see what I can find. First the intake then the magneto cover. I have to figure out what it's hanging on because whatever it is, it's solid. Maybe a frozen starter. I will report back with pictures tomorrow. Thanks for all the encouragement. Kinda cool knowing I have the forum looking over my back during this.


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First day tinkering on the XP. Pulled the arrestor, carbs, mag cover, oil pump and intake. Everything looks very clean. So I started scratching my head and decided to pull the pump. The thing was very hard to get off but motor spins fantastically without the pump! So I took the pump inside, has some really dark oil, but no water. It wasn't seized but I figured out what happened. Its already pretty chilly here in Chicago and the wear rings for both skis shrank around the impeller and made it very hard damn near impossible to spin. What a relief! A fantastic start to the build. Going to get a battery and verify spark and starter later on today.
 
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