Bonanza Walk-thru Windshield

this is a 1973 classic Bonanza with 165 hp Merccruiser motor..the stringers were replaced and or repaired about 7 yrs ago. the water pump in the lower unit was changed 3 weeks ago as was the thermostat and gaskets in the engine. Lower unit grease is fresh at the same time...boat is in good shape and runs great..has bimini top and new carpet...has radio with am/fm and cassette player....also has bildge pump and blower..newer battery...Boat sits on tandom axle trailer..Boat has been in our family since new in 73...only problem is a leak behind motor somewhere..I use bildge pump to pump water out but should be fixed ..I'm told the lower unit should come off and leak repaired..I planned on doing this myself but like everything else..no time..make someone a great classic boat