Swap battery between

Hi Odog,
Few things to consider,
1.Marine batteries are constructed/manufactured in a much 'stronger' fashion than 'auto batteries'. They are designed to withstand the rough treatment they get in a marine environment (as in pounding about)....if your going to just be putting around you may get away with an standard lead/calcium battery.
2. ALSO with AGM batteries, they are not meant to be used as a cranking battery!
3. The wiring/plug on your Anderson lead are they heavy enough to carry the load/current required to start your outboard?

Cheers & beers

Hi mate

you could but why would you ? batteries are heavy and transferring them from one to place to another is a pain if you ask me. And yep marine batteries are manufactured differently and have heavier plates in them ( or so I have been told ) for me just buy a new boat battery super cheap have them for about $130.00 and it should last between 5-8 years but the trick to it is to put it on charge at least once every 2 months whether you are using your boat or not.

Peter

It took me 20 years but with Solar on van and boat when not in use I find batteries last for years.A 4 stage battery chargers would do the same job.

Give it a go with a 10AMP Anderson to pass starter current on the Boat motor. It can't require that much to start a 50HP outboard engine. Just have a parallel 50 amp anderson to suit the normal use in the vehicle. Simple and save$$.

OH, Cushion the battery in the boat from sudden shocks. All ok then.

yes marine batteries are constructed differently to normal car batteries .... they have heavier plates and those plates are wrapped in glass mat.
The sealed maintenence free versions have calcium and other metals added to the plate material and a modified electrolite ........ they emply the very same technologies that AGM has but in a flooded battery ....... for many applcations they may be more appropriate than AGM.

SOME and only some AGM batteries are not designed for cranking ...... this has not a thing to do with them being AGM ..... there are AGM batteries that are specifically designed for cranking or will to some degree tolerate cranking ...... this is due to design factors other than being AGM ...... check the specifications on any battery before you buy.

Cranking currents on outboards are quite small particularly two strokes ..... I can hand start both my 30Hp merc and my 60Hp Evenrude .... my 30Hp merc is easier to hand start than my ride on mower...... the fourstrokes may require more cranking amps ...... but nothing a 50 amp Anderson should be concerned about unless it is up in the 90Hp+ range ...... Anderson connectors will handle twice the rated current for short periods.

I am more concerned about this battery behind the seat ........ two matters of concern
1 and above all else ..... batteries are very heavy and if they come free during an accident or a rollover they can be a very deadly missile.
When I say it should be well secured I mean a minimum of 2 x 50mm x 5mm straps longer than the battery welded to the underside of the floor and at least two rods 1/2 inch diameter and preferably a full top frame on the battery.

a battery that comes free will easily smash you skull before it smashes its way out of the vehicle.

2 regardless of the type of battery ventilation is always an issue ...... all batteries will at some time fail ..... will it leak, will it vent explosive gasses and vent acid mist, will it burn or explode

A battery behind a seat inside the pasenger compartment is not a good idea

think about it cheers