BrightE's
Paul
- Location
- Seattle, WA
So, here I was, 2 months into my search for a 750sx, the first jet ski I would ever own. I was well on my way to getting a nice ski (after seeing many with a lot of issues). Made the arrangements, drove 3 hours to get the ski, paid the guy $1,825 because of the amazing condition of the outside of the ski, the Wiseco pistons, the Skat Trak, etc. I was excited to finally find a 750sx in good shape with good compression (150 psi on each head). Started up like a beaut and purr'd like a kitten.
So I brought her home and over the last few weeks have been getting to know her more (haven't ridden yet, but went over all systems and parts until I understood their function and level of importance).
In preparing the ski for the Factory Pipe I bought for it, I noticed some fluid in the combustion chamber - of which I posted pics of earlier. No big deal I thought - until I pulled the engine to get off the cheap plastic case valve on the bottom side and the entire engine started oozing this thick, rusty, goop. It went on leaking it until there was a big puddle under the engine on the concrete. I knew I had a problem - and sure enough, after taking apart the engine, the entire thing is shot - rusted goo everywhere. It seems like it wasnt winterized for a few years in a row and just left to sit, soaking up its own moisture.
The pistons need to go, they're worn and burnt to a crisp on top, one of the connecting rod wrist pin bearings is the culprit for all the rust, or at least the start of it - needs new bearing, and a new connecting rod because its pitted. The cylidner walls are either due for a very nice honing, or a 0.5mm+ bore and hone... more $$$
Dug deeper - 2 of the four crank case bearings are making a lot more noise than I'm comfortable with. So they need replaced.
Now I'm looking at having to buy an entire new crankshaft assembly because I can't for the life of me find just the bearings available anywhere, needing two new pistons and everything they come with, and needing to get a bore and hone for the clyinders. Not to mention I need to have every piece of the engine dunked in a hot chemical bath to rid all traces of rust - what a nightmire.
So my first purchase now that started at $1,825 (I know, I overpaid, but I had finally after months of seeing jetski's and walking away because of this or that, had finally found a keeper), is now going to be adding some $700+ just to get it running for more than just the summer - ughh....
There is also pitting or damage where the crankshaft bearings meet the crankcase... not sure if this is going to cause me problems yet (the stock bearings have seals that ride right on top of the pitting), or if I'll get by without needing to get a new case.
So I brought her home and over the last few weeks have been getting to know her more (haven't ridden yet, but went over all systems and parts until I understood their function and level of importance).
In preparing the ski for the Factory Pipe I bought for it, I noticed some fluid in the combustion chamber - of which I posted pics of earlier. No big deal I thought - until I pulled the engine to get off the cheap plastic case valve on the bottom side and the entire engine started oozing this thick, rusty, goop. It went on leaking it until there was a big puddle under the engine on the concrete. I knew I had a problem - and sure enough, after taking apart the engine, the entire thing is shot - rusted goo everywhere. It seems like it wasnt winterized for a few years in a row and just left to sit, soaking up its own moisture.
The pistons need to go, they're worn and burnt to a crisp on top, one of the connecting rod wrist pin bearings is the culprit for all the rust, or at least the start of it - needs new bearing, and a new connecting rod because its pitted. The cylidner walls are either due for a very nice honing, or a 0.5mm+ bore and hone... more $$$
Dug deeper - 2 of the four crank case bearings are making a lot more noise than I'm comfortable with. So they need replaced.
Now I'm looking at having to buy an entire new crankshaft assembly because I can't for the life of me find just the bearings available anywhere, needing two new pistons and everything they come with, and needing to get a bore and hone for the clyinders. Not to mention I need to have every piece of the engine dunked in a hot chemical bath to rid all traces of rust - what a nightmire.
So my first purchase now that started at $1,825 (I know, I overpaid, but I had finally after months of seeing jetski's and walking away because of this or that, had finally found a keeper), is now going to be adding some $700+ just to get it running for more than just the summer - ughh....
There is also pitting or damage where the crankshaft bearings meet the crankcase... not sure if this is going to cause me problems yet (the stock bearings have seals that ride right on top of the pitting), or if I'll get by without needing to get a new case.
