That would be great on the mower. I occasionally use the 4WD truck and
the
tractor with front end loader during the winter but a freezing engine
seems to take a good charge to get running. I like the idea of sealed
automatic marine chargers myself but they seem to be on the expensive
side. That is probably the main reason I'm considering an enclosure for
chargers and running cords for the charging. I'm hoping extended leads
will work OK with low current maintenance charging.

My SOP on winter machine that are a bit old:
Hook up engine block heater wait 30 minutes
Hook up large charger, set to 40 amp.
Put in starting ether.
Hit glow plug heater.
Starts right up even at -40.

Now, i did have an old car that wouldn't start at -50 with this treatment.
So, I lifted car with floor jack and stuck the 500,000 BTU knipco under. 20
minutes later i was on my way.

Karl