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John Russell
Master Marine Consultant

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USA
3444 Posts

Initially Posted - 04/24/2009 : 14:49:53

I checked out the owner's manual for the right kind of oil for the lower unit on my Tohatsu 9.8. I found out that I needed 330ml of 90 weight oil. Off I go to the local auto parts store but, to no avail. So, I trek off to WM and find the tubes I need. Unfortunately, they are 295ml tubes. Hmmmmmmmm.

Methinks a conspiracy afoot, aarrgh!

John Russell
1999 C250 SR/WK #410
Bay Village, Ohio
Sailing Lake Erie
Don't Postpone Joy!

Edited by - on

Tom Potter
Master Marine Consultant

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USA
1913 Posts

Response Posted - 04/24/2009 : 14:57:35

Another option would be to buy the quart size and get one of the [url="http://images.google.com/imgres?imgurl=http://bpi.ebasicpower.com/mm5/graphics/00000001/LowerUnitPumpIllus.jpg&imgrefurl=http://bpi.ebasicpower.com/mm5/merchant.mvc%3FScreen%3DPROD%26Store_Code%3DeBasicPower%26Product_Code%3DMAL9-81002%26Category_Code%3DQWIKDRAIN&usg=__4lNpqR2Xwh0hzrKaYWhEBmTyffA=&h=456&w=216&sz=11&hl=en&start=13&sig2=ffdhVg3_nCfDK2RgGaKoNQ&um=1&tbnid=mq68ir-ixxVfkM:&tbnh=128&tbnw=61&prev=/images%3Fq%3Dlower%2Bunit%2Boil%26hl%3Den%26rlz%3D1T4GWYA_enUS310US310%26sa%3DN%26um%3D1&ei=BDXySYLKE5LitAOg5bzuCg"]pumps.[/url] Works like a charm.

Edited by - on

Ed Cassidy
Captain

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USA
365 Posts

Response Posted - 04/24/2009 : 16:20:47

No 90 Wt oil at a parts store? Now that's weird! Is it supposed to be 90 wt gear oil? Like in the rear end of most rear wheel drive vehicles?

Edited by - on

islander
Master Marine Consultant

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USA
4023 Posts

Response Posted - 04/24/2009 : 17:58:39

I would also go for the synthetic 90. The benefits outweigh the small increase in $$$.

Edited by - on

dmpilc
Master Marine Consultant

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USA
4593 Posts

Response Posted - 04/25/2009 : 10:13:16

Difference = 35 ml. That much might remain in the lower unit when you change the oil.

Edited by - on

Prospector
Master Marine Consultant

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Canada
3159 Posts

Response Posted - 04/27/2009 : 07:47:56

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Tom Potter
 Another option would be to buy the quart size and get one of the [url="http://images.google.com/imgres?imgurl=http://bpi.ebasicpower.com/mm5/graphics/00000001/LowerUnitPumpIllus.jpg&imgrefurl=http://bpi.ebasicpower.com/mm5/merchant.mvc%3FScreen%3DPROD%26Store_Code%3DeBasicPower%26Product_Code%3DMAL9-81002%26Category_Code%3DQWIKDRAIN&usg=__4lNpqR2Xwh0hzrKaYWhEBmTyffA=&h=456&w=216&sz=11&hl=en&start=13&sig2=ffdhVg3_nCfDK2RgGaKoNQ&um=1&tbnid=mq68ir-ixxVfkM:&tbnh=128&tbnw=61&prev=/images%3Fq%3Dlower%2Bunit%2Boil%26hl%3Den%26rlz%3D1T4GWYA_enUS310US310%26sa%3DN%26um%3D1&ei=BDXySYLKE5LitAOg5bzuCg"]pumps.[/url] Works like a charm.
<hr height="1" noshade id="quote"></blockquote id="quote">

I just picked up one of those pumps last week at Bass Pro, if you need another source...

Edited by - on

John Russell
Master Marine Consultant

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USA
3444 Posts

Response Posted - 04/27/2009 : 07:52:14

The guy at the auto parts store told me that the 80-90 weaght gear oil on his shelf in quart bottles wouldn't work. Not really knowing and not wanting to appear less smart than I already do, I didn't press the point. But, Isn't all gear oil, well, gear oil?

Edited by - on

Ed Cassidy
Captain

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USA
365 Posts

Response Posted - 04/27/2009 : 09:08:21

Not at all. Some are mineral, some are petroleum and some are synthetic. The absolute best thing to do would be to find out what the outboard manufacturer's specifications for the oil are and then match that with the specifications on the product, for example API GL4 or GL5. That way you can't go wrong and you don't have to pay WM's price.

Edited by - on

John Russell
Master Marine Consultant

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USA
3444 Posts

Response Posted - 04/27/2009 : 09:50:06

The owner's manual says API GL5 SAE 80 to 90. So, as long as these numbers on on the container, I'm OK?

Edited by - on

Dave Bristle
Master Marine Consultant

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Djibouti
10005 Posts

Response Posted - 04/27/2009 : 10:23:17

Yes--the GL-5 is key.

Edited by - on

Prospector
Master Marine Consultant

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Canada
3159 Posts

Response Posted - 04/27/2009 : 11:35:24

Does the same thinking apply to 2-stroke oil? In my garage I have 2 stroke motorcycle oil, Lawn equipment oil, and outboard oil. it would be nice to reduce the bottle-count.

Edited by - on

Ed Cassidy
Captain

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USA
365 Posts

Response Posted - 04/27/2009 : 15:41:29

Yes, the same thing applies. Simply make sure the manufacturers requirements are met.

Edited by - on

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The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.