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Old 28 May 2013, 06:12   #1
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Country: Netherlands
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Lower unit oil question.

Hello,
I have a 2007 Tohatsu 90TLDi engine where I want to change the lower unit oil.

Can I replace the oil in it with Quicksilver high performance gear oil ?
I ask because the oil that came out looks like regular oil and the high performance is green...

Thanks for advice.
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Old 28 May 2013, 10:01   #2
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Are you still runing your original Tohatsu oil ? If that's so, you should have changed it after first 10/20 hours. Oil color is not important at all, but must be 80-90 grade to lube gears properly. After break in period, you should change your leg oil every 100 worked hours.

Happy Boating
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Old 28 May 2013, 15:53   #3
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Yes, Quicksilver Hi pro oil will be just fine.
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Old 28 May 2013, 16:07   #4
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I had one once that when I used the high performance quicksilver oil it would not shift into reverse properly. After striping the gearbox and finding it immaculate I ended up using Volvo penta synthetic transmission oil which is a fully synthetic 75w90 oil which cured the problem completely.
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Old 29 May 2013, 12:50   #5
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Thanks for the info.
Changed the oil and ready for the summer (whenever it comes :-( )
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