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Thread: 90's Tundra oil pump gears ??

  1. #1
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    Default 90's Tundra oil pump gears ??

    A friend and I each picked up early 90's Tundras lately. I have heard some talk about the oil pump gears failing with age.

    What do you sled gurus know about that?

    I have heard the screws back out and cause the gears to lose their mesh a strip out, also the key for the gear may be plastic?

    Since these sleds are new to us and have had some use, I was thinking about replacing the gears and keys, any insights, tips, part numbers, would be helpful...

    HH

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    A lot of people take the gear off and plug up the hole and just mix you own gas. That way it will never go out.

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    Member hodgeman's Avatar
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    I've heard this was really common not too long ago- remove the pump and mix your own. I've even heard of folks taking a brand spanking new one, jerking the pump off and running premixed from day one.

    I would just check the mounting bolts and torque them every so often or use a bit of loctite to keep them where they belong. I've heard of tundra oil pumps falling off or cracking the mounting ears but I think it has a lot to do with how a lot of tundras are used- run hard with minimal maintenance.

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    Member Vince's Avatar
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    Quote Originally Posted by swapdonkey View Post
    A lot of people take the gear off and plug up the hole and just mix you own gas. That way it will never go out.

    i have done plenty of these... there is an actual plate you can buy from ski doo for the removal of the pump.

    then you mix 50/1 gas and never have any issues.
    "If you are on a continuous search to be offended, you will always find what you are looking for; even when it isn't there."

    meet on face book here

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    Member Dirtofak's Avatar
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    Also the bolts for the fan shroud/recoil strip out due to vibration. Then the entire oil pump is not driven. Tighten the bolts regularly or you will have problems.

    BTW - Check the carb boot!!!!! If it has ANY cracking, change it. Look on the bottom side!! Make sure that the clamp is properly installed on the carb to bracket!

    Mike

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    Conversely, I had a Tundra for years and it was flawless. Ditto for four friends. They weren't babied, either. Do standard common sense maintenance and ride the piss out of it!

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    Allright, sounds like if I find the screws loose I might want to take it apart and replace stuff, or just remove it and go premix.

    If everything appears to be in good shape, I think I will just run it and keep an eye on it.

    Thanks dirtofak for the reminder about carb boots. I had heard that but it didn't apply to me at the time.

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    Member Dirtofak's Avatar
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    Member atvalaska's Avatar
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    Thumbs up watch them moter mounts to..

    there is a plate on one side of the moter it cracks...i had to weld up 3 of them on 3 diff ones... the plate has a 2' hole in it if i remeber rite.. any kid jumper or hard., use it will be cracked sooner or later.....yup plastic grears in oil pump, they strip...mostly from "old" (read 80's) 2 cyle that is really thick, along the losse screws in/ around the pump. poped some drive chains a few times...all in all a GREAT sled!! fun to ride if u can stay uprite the 1st few times, easy to toss around ,249cc away!!!....
    WHEN IN DOUBT> THROTTLE OUT.......

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