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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Hi all - just wanted to close out this thread. Finally got a nice warm weather day to take the ski out on the water. hitched up the trailer and got down the river, started up after 2 secs on the...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    https://youtu.be/ZUbpKDt5EF0

    one more video...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Ok quick update. Now that I confirmed the ECU was defective, I ordered one online from Adrenaline Motorsports on eBay. They had the entire ebox and wiring harness which I bought, and plan to sell the...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    I'm happy to help in any way I can. It's great to be able to share things I've learned through this project. I'm not aware of a way to directly test the ECU. Possibly, Yamaha dealers have a test...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    SUCCESS!!! After swapping the ECU from the twin ski, the engine started right up on first crank!!!


    https://youtu.be/Igz2E7nCN3Q

    Process of elimination, everything else was working, the only...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    yup. I'm going to swap out the cam sensor first and see what happens. If same result, I will then swap out the ECU and test again. I'm don't think it's the flywheel wheel. I inspected that before...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    cam/crank sensor?? why do you mention that. I checked the cam position sensor, and it appears to be working correctly. I don't have the testing harness adapter, which could confirm it 100%. I could...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Given all that I've read about defective ECUs on these skis today, it seems to me that Yamaha might have used inferior solder to connect the injector power/ground wires to the circuit board inside...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    https://www.regulatorrectifier.com/catalog/2004-2008-yamaha-fx-cruiser-waverunner-ecu-testing-repair

    So what does it tell you when this company has a specific service to repair FX HO ECUs???? a...
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    Re: 2004 FX Cruiser HO ECU problems?

    what ever happened to this? were you able to get the ski running with new ECU?
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Reading this thread at once makes me hopeful and angry!

    http://www.pwctoday.com/showthread.php?t=296342

    If I replace the ECM and the ski starts right up and runs, I will be super stoked, but...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Sunday night update.... I think I've been more intimate with this ski than just about any other machine I've owned. And I say that in the most mechanical way possible. After conferring with a few...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    I haven't tested the fuel pressure with a meter, but from running an imperfect experiment pumping fuel through the FIs, it appears to be getting good fuel pressure. Running a few more tests tonight,...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Brand new. Before reinstalling the engine, siphoned all the old gas out and added 10gal new 89 octane (10% corn****) gas + a fuel additive/cleaner.

    One new item to report... I had the injectors...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Ok I ohmed them out
    All 4 show same
    Tip to hex: open
    Tip to Electrode: 4.96 - 5.12 kOhm

    Look correct ???
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Made a bit of progress tonight. After verifying that all 4 spark plugs are getting spark, I've ruled out spark and air. Must be fuel right? I disassembled the fuel rail and created a makeshift...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    the spark plugs are brand new, all 4, but I will check them anyway. I suspect the injectors are gummed up, as the ski has been sitting for 2+ years and had bad gas in the tank. we siphoned the bad...
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    Re: 2005 FX HO starting problem

    Even worse, what happened to me. I am rebuilding 2006 FX Cruiser HO and installed the positive starter cable backwards. Got the engine in before we realized it, so had to take the engine out to...
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    Re: "A picture is worth a thousand words."

    nothing a little JB Weld won't fix!!!
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    ground cables???? are you referring to a specific cable on the wiring harness, or the negative terminal on the battery?
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Hi all, thanks for following along. well, tonight we took the engine back out. When we first dropped it in, there were a few things wrong. For example, I mistakenly routed the positive lead from...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    thanks for the feedback. It appears that lack of spark is the problem, so I will focus there. I bought these as twins, so I have another ski to use temporarily for parts. I'm going to swap the coil...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Well...no success yet but not for lack of effort. We put the engine in tonight, had some trouble contorting arms to get all the bolts tightened and wiring connected. Filled with oil, and tried to...
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    Re: Jet Pump removal, impossible

    What ended up working for you? I have the same problem. a 2006 fx cruiser ho. I removed all the bolts and whacked at the ears with a hammer, and it won't budge.
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Luckily, I didn't have to go through that. the crank bearings were in good shape so I lubed and reused them.
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    just posted a bunch of pictures and some videos. Hope this is helpful to your project. Feel free to PM if you have specific questions.
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    A full walk around of the engine after re-assembly, just before dropping it back into the ski

    https://youtu.be/hF9PQACIE-4

    Lastly, here are two links that discuss how to install the cooling...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Ensure the timing chain is tight after installation

    https://youtu.be/AfWz2wtj5q0
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Crankshaft with piston movement


    https://youtu.be/AThlixAitEg
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Crank was smooth after pistons were installed.

    https://youtu.be/L6zZK9q52ng
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    A few videos:

    The cylinders cleaned up mostly well except for some staining from the salt water. I ensured they were smooth and honed to achieve the desired cross-hatching
    ...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    crankcase sealed, head done, cams, timing chain, and valve clearance all checked.

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    Exhaust pipes installed and all cables routed correctly. ready to drop in
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    I...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Removed the valves, then cleaned them and the head.


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    Valves came up pretty clean, and within spec. I did not lap the valves

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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Ok, now on to the second repair....

    You can see the corrosion that had formed in the exhaust port. This was the first sign of trouble...
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    This is what I had to start with... workbench,...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    This is the repair after the first accident.

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    You can see the aluminum repair on the had and how is changed the valve seating
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    Bottom end ready to assemble
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Sorry about the crappy .PNG files. Here are the easier-to-see .JPGs

    This is Day 1, first day I purchased the skis; had I only known then what an adventure this would be!
    546856
    This is the...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    This is what I started with for the second rebuild. All parts in bags and boxes...
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    This is the damage the head caused by the hydrolock. tore it up. That is why the machinist had to fix the aluminum
    546852
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    This is Day 1 immediately after purchase...little did I know then the adventure I was in for!!!

    546851
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    Here are pictures from the first accident, when the ski hydrolocked.
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    Re: 2006 Yamaha FX Cruiser HO (second) rebuild

    546845
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    2006 Yamaha FX Cruiser HO (second) rebuild

    This will be a long thread and I will post additional pictures later. The story starts in July 2014. I was in the market for a turnkey package and found a pair of 2006 Yamaha FX Cruiser HO...
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