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  Check lower unit for water before warming up.

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Author Topic:   Check lower unit for water before warming up.
Arch Autenreith posted 10-04-2001 05:56 PM ET (US)   Profile for Arch Autenreith   Send Email to Arch Autenreith  
I just read this the other day. Just before changing the lower gearcase oil crack the drain plug first BEFORE warming up. If there is any water in it the water will start to drain first because of course it’s heavier and will be on the bottom. Every time I change mine I often wondered if there was any water at all but because I always warmed it up before it mixed any water there might be with the oil. I could tell it there was a lot of water if it came out milky but if there was just a little I wouldn’t be able to tell. Just when I thought I knew everything there was to winterizing or just changing the lower unit. ;)

Any other seemingly small but helpful ideas?

Whalerdan posted 10-12-2001 04:31 AM ET (US)     Profile for Whalerdan  Send Email to Whalerdan     
One thing you have to watch when doing this is there can be a little bit of water in the gear box from condensation.
jimh posted 10-12-2001 08:29 AM ET (US)     Profile for jimh  Send Email to jimh     
Has anyone actually tested this idea by pouring a little SAE-90W oil and water together.

It seems to me that 90W oil might be heavier than water!

JFM posted 10-12-2001 11:13 AM ET (US)     Profile for JFM  Send Email to JFM     
I don't know about 90w but I know that 10w30 floats on top of water. I used to have an old Ford pickup with a cracked block that I used to run that I would drain the water out of the block from the drain plug and then fill up with oil. Those were the good old days. I ran that truck for a year that way. Also, look at the 2 stroke oil that floats on top of the water when you are idling. Regards, Jay
Whalerdan posted 10-14-2001 06:02 AM ET (US)     Profile for Whalerdan  Send Email to Whalerdan     
Jimh- Nope Gear Oil floats.

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