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Lower Unit Oil vs 80/90 Gear Oil

gunflint

Asked by gunflint,

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BobT Grand Master

BobT

Posted
Posted

That's a good question. I have asked this of a couple marine mechanics and their opinion was that it's the same thing. But then, that was their opinion and they aren't design engineers.

Consider this. The lower unit runs under considerably less hostile conditions than the rear-end in your car. It has a much better heat sink, a lake, for dissipating the heat caused by the gears although they may be turning at higher rpm, I'm not sure. This could promote more potential for foaming I suppose.

I'm interested in hearing some sound thoughts about this.

Bob

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    • Mike89
      Problems with Yetti

      By Mike89 · Posted

      good luck!!!   
    • rundrave
      Problems with Yetti

      By rundrave · Posted

      we had some nice weather yesterday and this conundrum was driving me crazy  so I drove up to the house to take another look. I got a bunch of goodies via ups yesterday (cables,  winch ratchet parts, handles, leaf springs etc).   I wanted to make sure the new leaf springs I got fit. I got everything laid out and ready to go. Will be busy this weekend with kids stuff and too cold to fish anyway, but I will try to get back up there again next weekend and get it done. I don't think it will be bad once I get it lifted up.    For anyone in the google verse, the leaf springs are 4 leafs and measure 25 1/4" eye  to eye per Yetti. I didnt want to pay their markup so just got something else comparable rated for the same weight.   I am a first time wheel house owner, this is all new to me. My house didn't come with any handles for the rear cables? I was told this week by someone in the industry that cordless drills do not have enough brake to lower it slow enough and it can damage the cables and the ratchets in the winches.  I put on a handle last night and it is 100% better than using a drill, unfortatenly I found out the hard way lol and will only use the ICNutz to raise the house now.
    • Wanderer
      Problems with Yetti

      By Wanderer · Posted

      I haven’t done any leaf springs for a long time and I can’t completely see the connections in your pics BUT I I’d be rounding up: PB Blaster, torch, 3 lb hammer, chisel, cut off tool, breaker bar, Jack stands or blocks.   This kind of stuff usually isn’t the easiest.   I would think you would be able to get at what you need by keeping the house up with Jack stands and getting the pressure off that suspension, then attack the hardware.  But again, I don’t feel like I can see everything going on there.
    • rundrave
      Problems with Yetti

      By rundrave · Posted

      reviving an old thread due to running into the same issue with the same year of house. not expecting anything from yetti and I already have replacement parts ordered and on the way.   I am looking for some input or feedback on how to replace the leaf springs themselves.    If I jack the house up and remove the tire, is it possible to pivot the axel assembly low enough to get to the other end of the leaf spring and remove that one bolt?   Or do I have to remove the entire pivot arm to get to it? Then I also have to factor in brake wire as well then. What a mess   My house is currently an hour away from my home at a relatives, going to go back up and look it over again and try to figure out a game plan.           Above pic is with house lowered on ice, the other end of that leaf is what I need to get to.   above pic is side that middle bolt broke and bottom 2 leafs fell out here is other side that didnt break but you can see bottom half of leaf already did but atleast bolt is still in there here is hub assembly in my garage with house lowered and tires off when I put new tires on it a couple months ago. hopefully I can raise house high enough that it can drop down far enough and not snap brake cable there so I can get to that other end of the leaf spring.
    • smurfy
      Just Food and Drink

      By smurfy · Posted

      Chef boyardee pizza from the box!
    • smurfy
      Just Food and Drink

      By smurfy · Posted

      Enchiladas 
    • smurfy
      Just Food and Drink

      By smurfy · Posted

      Venny neck roast!
    • Wanderer
      Merry Christmas

      By Wanderer · Posted

      Or he could go with leech~~~~~
    • Big Dave2
      Merry Christmas

      By Big Dave2 · Posted

      Bear can relate too. Tell Leech to start a new account named Leech5, we'll know who he is.If he has any trouble, Bear can walk him through it.
    • hugonian1
      Merry Christmas

      By hugonian1 · Posted

      Blessed Christmas to all.  

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