No water flow with '74 Mercury 9.8

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gregk9

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Location
North Central IL USA
Water pump and impeller was replaced last year and I've only used the engine a few minutes here and there just to keep in running shape. It was working fine when I tested it last time out last fall.

Now I'm getting no water flow but I *am* getting air flow out of the pee hole.

If I blow air into the pee hole, it comes out the water pump inlet hole.

When I blow air into the inlet hole, it blows out of the pee hole.

I put the lower until in a tank of water, fire it up; no water out of the pee hole but lots of airflow.

What gives????
 
Run your motor in a tank with the cowl off.Put your hand on the head & feel if it gets hot.If it gets hot you have an water pump issue.You might have to take lower unit off to investigate which is easy on a Merc.
 

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