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I purchased a Yamaho 4 stroke trolling motor a few years ago. I need to change the gear oil before I use it this year. The manual says it takes "Hypoid gear oil (SAE 90)." I live in Orem and I have called every boat dealer in the area except Eagle Marine. The line is constantly busy there--maybe they have gone out of business! No one in Utah County seems to carry the gear oil. Does anyone use this gear oil? Does anyone know where I can purchase some?
Lloyd
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I was looking for lower gear oil for my boat here in SLC and it took me a while to find it, had to go to Marine Products, but i believe boatersoutlet here in SLC has it too and i think they deliver, but not sure on that. [url "http://www.boatersoutlet.com"]www.boatersoutlet.com[/url]
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[size 1]"Hypoid gear oil (SAE 90)" is available at most any auto parts store. If you insist on something that says "Marine", I have even seen this at Walmart. Shouldn't be that hard to find.[/size]
[size 1]Hope this helps.[/size]
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You can find the gear lube about anywhere. If you want Yamaha product, go to Robertson's Marine in SLC. I use Amsoil synthetic gear lube since synthetic is superior. But I would definitely stick with marine lube as it is specially formulated for a marine environment. This is not an area to skimp and save a few bucks.
Another note, you should change your gear lube in the fall. If you wait until spring--after winter--then any damage that let water into your lower unit will now be compounded from freezing and bursting/warping or rusting internal components. And replace the little screw gaskets every year too.
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Just a thought...I was told by a mechanic to never use 100% synthetic...it does not allow for proper seal moisturization. So a little bit of dinosaur juice, or a semi-synthetic blend is the way to go.
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You shouldn't use 100% synthetic oil in a new engine because it lubricates too well to prevent a proper break-in of the motor. But the seal rumor is a myth. What can happen is if you add 100% synthetic to an older motor, the synthetic oil will find any weaknesses since it is less viscous and it can leak. But if you add it to a newer motor (after break-in), then there's not a problem.
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That makes sense. Thanks.
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I was curious as to what makes hypoid oil different and ran across this link:
[url "http://yarchive.net/car/hypoid_gear_oil.html"]http://yarchive.net/car/hypoid_gear_oil.html[/url]
If the gear lube says it is "EP" or "GL-5" it is also considered to be hypoid oil. I have seen these types of oil a lot more often than oil that is labeled "hypoid".
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