Concerned About Water Stream

Posted: April 1, 2013

By: Grid Michal

I replaced the thermostat in my 1998 Mercury 75 hp outboard, and it has worked fine almost all season. It has had a firm, steady stream from the port all summer. Last trip out, the stream was not nearly as steady as it has been. I ran some fresh water through it when I got home, and it was the same as on the water. It is not a trickle or anything; it is just not what it was. Should I be concerned?
Since you indicated the stream is the same whether you’re in the water or force-feeding water under pressure, you should look for trash in the discharge hose or outlet pipe. If it’s totally clear, then replace the water-pump assembly (14 years is a long time). The installation of a factory water-pressure gauge should ease a lot of fear.

Posted By: Keith On: 4/5/2013

Title: OB Impellers used in salt water...

Should be replaced religiously every other season, no exceptions!

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