Haven't hears of a fw pump that requires removing the stove but I guess anything is possible. Take a good look around, often there's a wood panel that can be removed to access the pump and this screws can hide in the dark.
I think it gets pretty cold in Indiana. I use air and antifreeze. Antifreeze is cheap, new fresh water pumps and plumbing isn't.
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Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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