Hey everybody - I troubleshot a bit and thought it would be prudent to start a new thread.
So here's problem: My Yamaha GP760 just won't start. I was riding it about 6 months ago and it just randomly turned off on me, stranding me in the middle of the St. Johns River in Cocoa, FL. Whatever I did, I couldn't get it started again.
Enter now, when I've finally gotten around to taking a look at it, and obviously, it still won't budge.
At first, I thought it was electrical. But that doesn't seem to be it. In my other thread, I alluded to it being perhaps a bad CDI unit. But, I put the allegedly bad CDI into another waverunner and that one fires right up.
The one thing that really concerns me is that after I removed the plugs, I tried to turn the coupling (wheel) between the engine and the driveshaft by hand, but it just won't budge. I put every ounce of energy I had into it, and nada. I even took a wrench onto the driveshaft, where it connects to the impeller, and I can't get it to move.
I thought that maybe since I hadn't used it for so long, the oil had gummed up. I opened up the crankcase completely. Everything in there is pristine and shiny. No signs of gumming. Nevertheless, I even used penetrating oil for good measure, with no luck.
The starter was definitely in bad shape. The entire stator was corroded and ready to fall apart. I removed it, but even with that, I still can't get the driveshaft to budge.
I looked in and around my impeller for signs of obstruction. Maybe rocks, reeds, and so on, but there's nothing. It's pristine.
The only thing I haven't done yet is to remove the whole engine...Of course, I don't have an engine hoist, but since I've basically disassembled the engine piece by piece already, I don't imagine it will be too difficult to get it out.
Please help! Any suggestions on why the driveshaft's stuck?
Another question: I'll be moving from FL to NY at the end of the summer, and I was planning on selling my (twin) jet skis. One works like a charm and the other, well, I've already told that story. What are your guys thoughts? Since I'm selling both of them anyway, it it really worth doing all this work on the bad one? Or should I just try to sell one as a "parts" ski? If I can get the ski fixed, it performs very nicely. At the same time, every minute I spend working on it is a minute I'm not on the water.
Thanks in advance for your help.
So here's problem: My Yamaha GP760 just won't start. I was riding it about 6 months ago and it just randomly turned off on me, stranding me in the middle of the St. Johns River in Cocoa, FL. Whatever I did, I couldn't get it started again.
Enter now, when I've finally gotten around to taking a look at it, and obviously, it still won't budge.
At first, I thought it was electrical. But that doesn't seem to be it. In my other thread, I alluded to it being perhaps a bad CDI unit. But, I put the allegedly bad CDI into another waverunner and that one fires right up.
The one thing that really concerns me is that after I removed the plugs, I tried to turn the coupling (wheel) between the engine and the driveshaft by hand, but it just won't budge. I put every ounce of energy I had into it, and nada. I even took a wrench onto the driveshaft, where it connects to the impeller, and I can't get it to move.
I thought that maybe since I hadn't used it for so long, the oil had gummed up. I opened up the crankcase completely. Everything in there is pristine and shiny. No signs of gumming. Nevertheless, I even used penetrating oil for good measure, with no luck.
The starter was definitely in bad shape. The entire stator was corroded and ready to fall apart. I removed it, but even with that, I still can't get the driveshaft to budge.
I looked in and around my impeller for signs of obstruction. Maybe rocks, reeds, and so on, but there's nothing. It's pristine.
The only thing I haven't done yet is to remove the whole engine...Of course, I don't have an engine hoist, but since I've basically disassembled the engine piece by piece already, I don't imagine it will be too difficult to get it out.
Please help! Any suggestions on why the driveshaft's stuck?
Another question: I'll be moving from FL to NY at the end of the summer, and I was planning on selling my (twin) jet skis. One works like a charm and the other, well, I've already told that story. What are your guys thoughts? Since I'm selling both of them anyway, it it really worth doing all this work on the bad one? Or should I just try to sell one as a "parts" ski? If I can get the ski fixed, it performs very nicely. At the same time, every minute I spend working on it is a minute I'm not on the water.
Thanks in advance for your help.
