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need to change hydro oil. i have a 1988 721 gasoline kubota engine. yes its gasoline mist people think it should b a diesel even the dealer. lol
cant find hydro oil where i live that iz either grasshopper brand or mobil dte 26. as suggested by manual.
even grasshopper dealer does not use the brand. i guess bc they sell and service others too.
my question is ....i have reAD Where mobil 1 can b used in place of hydro oil. anyone tried this.
btw i have the hydro gear with 2 filters. company says that distinguishes which one i have idk
i need 2.5 gallons so the cost is going to b high either way

I just changed mine, the new Mobile # is DTE 10 Excel 100 this is the oil recomended by my Grasshopper dealer as well as Grasshopper. Mobile no longer make the old number listed in your owners manual.

thanks. any suggestions of a chain store that can be bought at. I can't find any hardly except universal

I would search the Mobile web site I'm sure they would have a dealer locator tab. I actually bought mine from a local petroleum dealer that was an authorized Mobil dealer, I might add I had to buy in 5 gallon container. I'm sure I'm telling you something you already know but be sure to change filters at the same time.

BWH said:

I would search the Mobile web site I'm sure they would have a dealer locator tab. I actually bought mine from a local petroleum dealer that was an authorized Mobil dealer, I might add I had to buy in 5 gallon container. I'm sure I'm telling you something you already know but be sure to change filters at the same time.

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Thanks I will try that. I know I saw on Internet somewhere where they sold 5 gal for around $100. Grainger won't tell me the price of shipping but I am not sure if they sell it in 5 gal
Yea, I already have two OEM filters from dealer last time I was there. Not only is the dealer an hour away but they do not sell the mobil oil nor the grasshopper oil. They said its a substitute.

Yes the $100.00 is about right it seems I may have paid slightly more. I guess I'm lucky to have a excelent dealer 10 minutes away and a second dealer 30 minutes away that will deliver parts at least twice a week to our small community. There are a lot of Grasshoppers in our area which helps to keep the dealers going. By the way my 721 is also liquid cooled gas also, I can't complain about it except I have the manual fold deck and would like to upgrade to a power fold someday.

BWH said:

Yes the $100.00 is about right it seems I may have paid slightly more. I guess I'm lucky to have a excelent dealer 10 minutes away and a second dealer 30 minutes away that will deliver parts at least twice a week to our small community. There are a lot of Grasshoppers in our area which helps to keep the dealers going. By the way my 721 is also liquid cooled gas also, I can't complain about it except I have the manual fold deck and would like to upgrade to a power fold someday.

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Believe we have same mower. Mine too is manual. Only part I hate about that is taking blades off or trying to clean underneath. Other than that have been pretty happy with mine. It did require a coil or something like that. Not a starter coil but deeper. Required a timing. I had to have dealer do it and it cost more in labor than part did. Somewhere around $700 total
However now its got a carb issue that if its warm and I stop it on a slight hill it will die when I crank and take off again unless I let it idle on flat surface for a min but then its seems ok.

Ouch $700.00!!! Hope your carb problem dosen't end up that costly. I guess I have been lucky I have only had to replace a few belts and a motor mount. How many hours are on your 721 I have 450 on mine.

i have nearly 1000 hours. I bought it around 650 hours. Yea about $450 was labor. I cant think what they replaced but it was something like a solinoid or distributer. it had gotton moisture in there and rusted. its been a few years. I know they had to do a timing adjustment with the labor. I hope the carb work might be simple and I can do it. Someone suggested could be an evaporator.

I did do a typo in original post Mine is a 1998 721

BWH said:

Ouch $700.00!!! Hope your carb problem dosen't end up that costly. I guess I have been lucky I have only had to replace a few belts and a motor mount. How many hours are on your 721 I have 450 on mine.

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UPDATE
bought hydraulic fluid. I bought from Zoro tools. Paid 19.99/gallon x3. Got free shipping!!!! Could have bought a 5 gallon tub but since I only use for my own yard I doubt I woould need it anytime soon and would have to store it as well. Got it in next day.

Just thought I would pass that along

erbowman said:

UPDATE
bought hydraulic fluid. I bought from Zoro tools. Paid 19.99/gallon x3. Got free shipping!!!! Could have bought a 5 gallon tub but since I only use for my own yard I doubt I woould need it anytime soon and would have to store it as well. Got it in next day.

Just thought I would pass that along

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Did you buy hydraulic fluid or hydraulic oil ?

(( racing is the only sport that you need two balls ))

sorry
hydrolic oil
mobil 26 dte. people kept bringing that one up plus its in the manual