Loose exhaust flappers will not be a cause for water inside the boat. They keep the water from being forced into the engine.
You can run the heck out of your bilge pump and not drain the battery. Any chance the water is coming in through your cover?
Tandem Axle Trailer Special
Includes: 4 T07 wheels, 4 ST205/75R14 Kenda
Loadstar KR03 Radial tires, mount and balance
ALUMINUM WHEEL AND TIRE PACKAGES
SINGLE AXLE 14" PACKAGE STARTING AT $369
SINGLE AXLE 15" PACKAGE STARTING AT $439
TANDEM AXLE 14" PACKAGE STARTING AT $649
LED lights, Spare Tire Carriers, Chrome & Powder Coated Lug Nuts
GOLF CART TIRES & WHEELS
PM me or email firstname.lastname@example.org