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My X595 seemed to be slowing down a bit lately and the other day it almost stalled out while I was driving to warm the hydro for some maintenance before snow season. I changed the fluids and filters and decided to mow the leaves to see if the new fuel filter helped. In 10 or 15 minutes of running the engine almost stalled numerous times and there was already some crud in the bottom of the just cleaned fuel filter bowl. Time for some surgery.





First step- remove the seat. Four bolts, you'll need a 10mm socket.


Remember to unplug the seat switch. Next up the 4wd selector lever.





You'll need a 19mm socket for this. The handle is "keyed" onto the shaft so it won't spin, you need to pull straight up.
 

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The fender has two bolts into the footwell on each side, 13mm wrench for these.



On the left side the rear bolt for the hand grab has a clamp to lock the fuel tank to the fender. I took the rear lights out so I could better see what I was doing. This also needs a 13mm socket.



Lift the fender enough to unplug the lights and fuel gauge. Remove the seat support bracket and the tank is free. I took this after power washing it.


The top of the tank was as dirty as this. A few minutes with the power washer made the rest of the work much neater.

Think I might have found the problem.

I had siphoned most of the fuel out but left about a gallon. When the tank was free I sloshed it for about 10 minutes hoping to get most of the gunk in suspension. I think the pick up screen had been covered top and bottom with the algae. It was even inside the pickup screen. I started with hot water which was OK but not great. Then I found a bottle of bilge cleaner from the boat and that worked great with hot water. I removed the screen from the sender unit and agitated it in the bilge cleaner until I got all the algae out of it. Everything seems to be working fine now.
 

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How has that machine been stored??

Great pics,,,BTW!! :bigthumb:
 

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Thanks so much for the detailed pictures. Looks like you found your problem. WOW
 

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Diesel fuel needs an anti fungisidle treatment added when you buy the fuel. Much like gasoline need stabilizer added to it. Well that is if you want to avoid problems
 

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I see on average 5 or 6 a year. Just did a brand new, Less than 50hr, X750. Its a nasty mess for sure. Algae grows where there is water. Even a little bit. Check all your containers. Fill tank after use. park in shade out of the heat. Check regularly for condensation under fuel cap. Nice job with the pics and repair!
 

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Discussion Starter #9
How has that machine been stored??

Great pics,,,BTW!! :bigthumb:
Good question. It's a 2004, so it's 11 years old. I bought it last spring and have it in a portable garage (Not great due to condensation.) but I have kept the tank topped off. I've not put much time on it so I really don't know how long it's had this algae problem.

It doesn't take much water to create a favorable environment for algae. Someone may have gotten bad fuel or it could simply have been a refueling during rain or snow, or just condensation. I've not had this in my other tractors or the boat so I'm thinking this happened before my ownership.
 
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