old mercury 4hp impeller problem

chestercheese

Petty Officer 3rd Class
Joined
Oct 14, 2009
Messages
79
hello you good people
i've got an old merc 4hp about 1970's
i've put a new impeller in and blow'd all air ways and pipes,
but cant seem to get a good water flow (if any at all) is there a strong tell tell on these old motors or does it come out of the prop?
the engine does get really hot but it does'nt seem to effect the running of the engine, i've had it running like this for about 10mins on about 5 occassions, it all ways starts and is quite happy
many thanks dan
 
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