Changed impeller, now tell tale is weak

[MercGuy]

Hi everybody,

I have a 1998 Merc 115 2+2 with 1,125 hours on it. It has always run perfectly.

This spring I replaced my water pump impeller as normal maintenance. Everything was fine before the change, but after installing the new impeller I've noticed a few things:

1) The tell tale stream is quite weak at idle. I assumed that something was clogging the line, but I took the hose off and it was clean as a whistle, the little tell tale fitting was clear also.

2) My engine used to get to about 140 degrees at idle and then when I passed about 2000 rpm the temp would drop to 110 degrees (I have a temp gage on the dashboard). Now it idles at 140, but only drops to slightly below 130 after 2K rpm.

3) I remember the tell tale water as always being cold before (I could be wrong about that), now it is warm. Not hot, but warm.

So, my questions are:

Any idea as to what is causing the change ?

and

Are my running temps OK ?

Oh, forgot to mention that I have changed the impeller many times on this engine (I bought it new) and I used an OEM Mercury part, not a knock off.

Thanks !!

 

[flyingscott]

Did you get the water tube lined up correctly in the housing

 

[MercGuy]

I would have to guess so. I would think that the tube either lines up or it doesn't.

I can't imagine that if the tube wasn't connected at all that there would be any water flow.

 

[flyingscott]

Check for any blockages in the intakes. If it pumped before and doesn't after you changed it I don't know If I would guess. I would want to double check.