90 hp mercury outboard 4 stroke


Old 01-23-07, 07:25 AM
Thread Starter
Join Date: Jan 2007
Posts: 1
90 hp mercury outboard 4 stroke

I have a 90 hp mercury outboard 4 stroke that has water collecting in the oil.
When I pull the drain plug there is a few ounces of clear water in the oil. The engine has 500 hrs on it since new. The warranty has expired as it is a 2001. I have changed the plug and gasket, and the local dealer can't seem to come up with any reason there should be water in the oil. I am a good tractor mechanic but I do not understand this problem very well.
Anyone have any suggestion???
Sponsored Links
Old 01-23-07, 07:10 PM
Join Date: Jan 2007
Posts: 81
As you probably know only 3 reasons, Cracked head/case or head gasket. Does water run in intake manifold, if so could be cracked manifold or leaking gasket. See if you could get a hold of a tech at mercury. http://northamerica.mercurymarine.com/utility/contact/

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes