what size and type of batteries ?

[pdt]

what type and size batteries are you all running on engines in the 40hp to 90hp category ?

do you mainly have just enough power to crank it over and use ultra lightweight agm style ?
or do you use conventional car battery's with a bit more amp/h rating.

i know that the agm type batts can be a lot lighter for a given amount of voltage and amps etc, but is the cost of such batteries realy worth it.

Plus ive read on a electrical site that says most outboards need to use lead acid rather than sealed maintainace free batteries or you
could destroy the electronics !!!!!!!!!!!

any thoughts on this subject ?

.

[Fastjeff57]

I've used a standard, lawn mower size battery for years.

This spring, thanks to ethanol gas leaving crude in a carb, my Merc triple died out in the middle of Beltzville Lake--and it was damn cold! I crank started that sucker at least THIRTY times on that little battery before I was able to limp back to shore. Does that answer your question? Also, I use the same battery to start my Merc 850.

Jeff

[pdt]

cdi electronics installation sheet tell me.

DO NOT USE A MAINTAINENCE FREE, AGM OR DRY CELL BATTERY WITH THIS TYPE REGULATOR/RECTIFIER AS
THIS WILL VOID THE WARRANTY !!!

maybe omc do some weird stuff with their electrics, as ive read this in a few places now.

[omcstratos]

500cca Interstate battery

[pdt]

is the Interstate battery a lead acid battery that can be topped up if need be ?

if so its probably the same type that i am looking to buy right now.
i have found a Banner P7209 that's 72amp/h and 660 CCA battery, Brand new for just about half the normal price, it is slightly on the
heavy side at around 37 pounds total weight. But i think ill have plenty of power for starting plus any other stuff.

.

[Fastjeff57]

Good idea, in boating, to only use a battery that you can check and fill the liquid levels.

Jeff