new to the forum, new to the jet boats
i am taking my dads boat from him, i went to UTI in sacramento and while i was gone he left the jet boat out for years in open weather
currently in tacoma washington, its a challenger with a olds bored to 471 apparently. i got the motor back up and running after some maint. but before i let it warm up with the pump hooked up to it, i want to know about pump maint.

i read its not a good idea to leave it attached when running the motor off a hose, i am not sure who made the pump, ill attach pictures
but the motor and pump were built/rebuilt four years ago and have 16hrs together, when do pumps need a rebuild, how often should i grease the zerk fitting and change the gear oil if it takes some, i used search on the forum but to no avail on a clear answer.

any quick tips to get me on the water would be great

thanks
christian