Have a Johnson 15HP J15-ECDE (1986?). No water was coming from the tell tale so I purchased a waterpump kit and replaced the impeller, housing,etc with the new parts. Used red gasket making compound for metal to metal contact. Allowed recommended set time. Put it all together and no water out the tube. Now if I force water INTO the back side of the tell-tale hose (where the water normally comes out), it will work perfectly. Almost like I have to prime it to get it going. It all worked fine 6 months ago the last time it was out on the water. Any suggestions appreciated. Thanks.

