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Dominator pump aa aggressor been sitting for years just finished putting my engine in yesterday and when trying to start the engine and while idling it makes a growling sound coming from around the pump any ideas on what this might be
 

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Kinda a normal noise when tuning a pump out of the water

Is a big no no if you like your pump at all pull the drive shaft to run and tune the boat
 

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Dominator pump aa aggressor been sitting for years just finished putting my engine in yesterday and when trying to start the engine and while idling it makes a growling sound coming from around the pump any ideas on what this might be
Setting for a long time might give pause for some concern over bearing issues (rust or corrosion forming) however some "machine noise", driveline rattle is a common malady in jets and is made worse with worn splines , solid engine mounts , alloy hulls and heavy impellers , lumpy cams etc , typically this noise dissipates with a slight impeller load (RPM increase over idle )
 
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