Just a little clip, i thought might help.

 

Its really hard to give a recommendation without knowing the original condition, cause of the failure, and the number of hours on the engine. For instance was the compression good in the other cylinders? When were the carbs last cleaned or rebuilt? Loss of the #3 cylinder is often due to an oil line coming loose from the oil injection system. For some reason the #3 cylinder is affected 90% of the time, so you probably need to check/replace the oil lines. The other possible cause is a lean run from dirty carbs., so without knowing the history of the last carb. rebuild, I'd say that you would have to rebuild the carbs. as a precaution.

For me on an unknown ski the minimum would be: pull the engine and completely rebuild the top end. You may get by with just addressing the #3 cylinder, but on an 11 year old ski, I think you are better off doing all 3 at the same time, especially if the engine has over 100 hours, since the other 2 are going to need work soon. I think I would also crack the case and look at the crank and seals, and consider replacing if there is any sign of damage. This is especially true if there is any missing metal from the piston. Do a leak down test before reinstalling the engine. Do a compression test once you get it all back together. Then I'd rebuild the carbs. Since this is a 2002, I'd replace the catalytic converter with a D plate and chip if this has not already been done while you are in there. It would also be a good idea to check the power valves to see if clips have been installed. If not, I'd definitely clean up the power valves and install wave eater or similar clips.

Total cost $1000 or less if you do the work yourself, and there is no crank damage, but I'll warn you that these things can become real money pits if you don't fix them right the first time.

 

Your cheapest way to get it to work is fix it yourself. The downside is that it will take an enormous amount of time and education.

Your best way to get it to work is pay the best jet ski engine tech in town to fix it. The downside is where is this person and how are you going to locate him? The old saying is that the doctor you are hiring may have cheated his way through medical school and graduated at the bottom of his class.

 

Thank you guys for the quick replies.

The jet ski is in brand new condition, and it has 70 hours on it. The guy told me that he always rides it in saltwater, then he took it to a freshwater lake and thats when it happened. Does it make sense that it happened from the change to freshwater?

Bottom line i had a friend of mine look at it, he knows a lil about motors and stuff he says the head looks just fine, but cylinder #3 and piston, and crankshaft got damaged.

 

The lean oil condition to make that top and bottom rod bearings faulted, it just happened does not matter the ski ran in salt water or flesh water, if the first and second cylinder and bearings are still in good shape, you will need a new third cylinder if you don't want to horn the used one, new piston, ring, rod bearings and etc for the rebuilding.

 

The damaged crankshaft adds another level of difficulty to the rebuild and significantly more expense. Hopefully, you didn't pay too much for this ski. You may find that repairing it will cost as much as you could have found the same model in good running condition.

 

It makes sense what your saying.

How much do think its worth as is?

 

It's probably worth about $1,000 - $1,200 as is.

Zardoz

former sea doo owner, will never own one again

 

Yea, its basically worth the value of the hull plus the electronics, pump parts etc..

 

So your saying the motor is nothing worth?

 

I will offer some thoughts.

Of course the engine is has worth. It likely has much more worth than people know or admit. There is always a guy right around the corner ready to help you out by giving you 30 or 40 dollars for it. Tell him thanks but no thank you.

Check the prices online for used engine parts. Completely disassembled the engine. Clean the individual parts. Photograph the parts. Advertise and sell them online.

In the meantime, purchase a good rebuilt engine from a reputable outfit.

I will give you an idea of what I am talking about. I had a wrecked sports car and one of the items it needed was a hood latch. I looked online for a used one and it was in the 30-40 dollar range. Now multiply that times many parts and you will get the idea.

The head, block, camshafts, starter, oil pump, oil reservoir, pistons, connecting rods, crankshaft (I have had them straightened. They can be sold even when bent). All these are high dollar items in my book

Rebuild GP1200R motor - YouTube

 

Rebuilding a Yamaha ski two stroke engine isn't as easy as you think and it's not a toy car especially if you have never done it before, that job will request lots of tools, experience, and etc, if your engine lucky enough, the crank shaft isn't always damaged by the roller bearing faulted, someone used a special tool to replace the bad rod bearing without buying a new crankshaft. if I were you and want to sleep better, I'd tow it to the local ski shop to let them to fix the engine with the warranty, our hobby will always cost some money.

 

I think Zardoz's estimate is pretty realistic for parting out a ski with a blown engine. You can get a few dollars for salvageable engine parts, the electronics, and the hull.