WREKS
Jetboaters Lieutenant
- Messages
- 1,167
- Reaction score
- 474
- Points
- 167
- Location
- Port Saint Lucie, Florida
- Boat Make
- Yamaha
- Year
- 2007
- Boat Model
- SX
- Boat Length
- 23
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I built a gantry and used a chain hoist. I have removed and reinstalled the engine four times now and have it down to about 3 hours to remove and the same to install.
A standard engine hoist won't get it high enough. I tried .
Here's what I built.
Pm me @Jgorm if you want to go over how to get it done.
View attachment 51653 View attachment 51652 View attachment 51651
I can pull it in about an hour by myself. Of course I am all setup for it and its way easier in a ar230. The only thing I need help with is removing the engine cover. Here is my setup.
About 400 hours and it was a salt water boat, but flushed after each use.Thanks for the update and pictures, especially about the cooling passages
Do you know how many hours are on the engine?
Was it fresh or salt water boat?
What did the thermostat and anode look like?
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Mine are free and clear, however there is a lot of salt build up around the rubber joints that I will have to clean, however the 3 holes on the 90, j, and small pipe are all clear, I will be passing some brake parts cleaner through it though to get ride of any potential debris.Can you take a picture of the end of the exhaust (the long J shaped one)? There are 3 holes that allow cooling water to enter the exhaust steam. There have been reports these clog with salt.
So I reached out to my very trusted car mechanic and he advised that in the current state of the crank that if I put everything back together with new journal bearings, that he would be surprised if the engine lasted more than 10 minutes. Not shocking based on the gouging.Do you have a micrometer to measure the crankshaft journals? I would recommend being very picky about tolerances with those journals, 10,000 RPM is no friggin joke. As for the sides, different engines have different tolerances. Some engines have enough clearance to where the rods will "float" back and forth a little. I wouldn't be too worried about a design like that, but I get the feeling this might not be the case here. My question would be what caused the marring? Do the bearings have a flanged portion that rides the side, or was it the actual connecting rod that rubbed the side of the crank journal? Overall, I would like to believe that the sides of the crankshaft journals won't be too critical, but words like that are relative to who's talking, and who's listening...lol. I would be freaking anal about the journals themselves, though. Pics would be beneficial too...
Just found his two videos, very helpful. Makes a lot of sense, cylinder 1 at TDC and the cam dots aligned with the alignment mark. Very confident in my abilities once I get the crankshaft repaired.I can't look to find it now but check @Jgorm posts, he did a complete rebuilt and posted a bunch of great pics.
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No, there are no gouges in the cylinder wall, just seems that the journal bearing rubbed against the crank shaft wall and caused it to seize.@okula225 Was the piston above the scarred journal somewhat seized?