10-23-2014, 03:47 PM #1
stuck pistons in a 800 motor remedy
I just got a motor from a 1996 seadoo gsx. The pistons are stuck jn the cylinder since it stood for a long while. There is no rust on the spark plugs so there is still hope that mabye only a topend swap is its remedy. Now I have heard so many ways to loose the pistons, from pouring brake fluid to diesel fuel and just plain wd40. What is the best to loosen up the pistons. I assume I got to tap them out anyway. Anyone with this experience let me know.
10-23-2014, 03:57 PM #2
I'm certain it wasn't stored properly and water was left in the water box, my best guess is the crank bearnings are pitted and if you get it running I bet it won't last long. Jmo.
10-23-2014, 05:43 PM #3
- Join Date
- May 2008
- Elephant Butte New Mexico
I was able to free up the pistons on a donated ski of the same type with wd-40 and lots of pb blast..took some time and I beat on the pistons for a bit and I was able to get the engine started( generous applications of my patented formula of all the crap I have laying around the shop to lube the crank bearings.
results may vary, but I got away clean on this one. Compression 125/125.
I am going to pull it apart to put some new rings in just in case, I will look a gift horse in the mouth to see if he's a nibbler or not.
This ski has a ride plate I'm not familiar with..has mini skegs on it!..two of em!
I don't recall ever seeing these before
As results will vary, you would likely need to replace the crank if there was any signs of rust on the crank when you pull the jugs off.
I might have gotten very lucky..but I somehow doubt the motor will run more then 25 hours, even with new rings before one of the crank bearings fails..and that's only because the ski had 150 hours on the clock
10-23-2014, 06:43 PM #4
10-23-2014, 07:47 PM #5
- Join Date
- Mar 2009
- Netherlands antilles / Bonaire
I would also throw in a mix of purpleblast wd 40 and wd 40 rust desolver.. and start tapping it with a hammer and a peace of wood and or cloth
have seen people storing seadoo 's for a long period with out properly washing and flushing.. and getting it working again with a hammer wd40 and purpleblast and starting pilot haha!
Greatings from Bonaire
10-23-2014, 09:48 PM #6
10-24-2014, 04:31 PM #7
I heard of stuck pistons losening up with marvel mystery oil. It's a lube but dissolves rust too. Pour a ton into each cylinder and let it sit for a month. Then try to crank the engine.
10-25-2014, 07:26 PM #8
10-26-2014, 07:53 PM #9
12-10-2014, 08:50 PM #10
Well guy I manage to get everything loose. Surprise surprise, Even the pistons are in great shape. It just got stuck on a ring, replaced the ring and all is well. I honed the cylinders and assembled everything back. Got perfect compression. The crankshaft is like new. Now its ready to go in my 96 XP. Ready to assemble another engine I got for the GSX. Some wrap kits and a new seatcover and it will run nice for the kids.
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By red rider in forum Sea Doo ClassifiedsReplies: 2Last Post: 07-17-2008, 07:53 AM
By water worx in forum Sea Doo ClassifiedsReplies: 1Last Post: 07-16-2008, 03:54 PM
By FLjoyrider in forum Yamaha ClassifiedsReplies: 5Last Post: 07-15-2008, 09:23 PM
By levonhelmet in forum 2-Stroke PerformanceReplies: 7Last Post: 08-19-2007, 10:07 PM
By levonhelmet in forum 2-Stroke PerformanceReplies: 5Last Post: 07-25-2007, 09:56 PM