1975 Evinrude 115 battery CCA recomendations?

[jammer777]

hey guys! in my quest for easier starts on this old engine i have come across some people saying get a marine battery with as high a Cold cranking amp rating as possible to help turn this thing over at start, ( i have an Evinrude where i rebuilt the carb and she runs beautifully all day and starts perfect after the first initial ridiculously hard 15 minutes to get cold started)

My question is, is there such thing as too many CCA ? i wanted to get a really powerful as close to 1000 CCA battery to try and assist, what do you guys recommend? what are you guys on your older motors running?

 

[Redfred1]

Hope you get a reply J. I have to get another battery for my (new to me) '79 Evinrude 100. The only thing it would be used for is motor; depth finder; and bilge pump. I would like to get a dual purpose battery; it would not stay in the boat. will be looking for anybody's input. RF

 

[schematic]

Large CCA is a good thing, but it sounds like you are trying to fix a start problem with a battery. Do your choke valves completely close? Are you priming it hard? Are you setting the fast idle?

 

[jammer777]

oh ya ive got a long winded thread from last year

http://forums.iboats.com/forum/engi...inrude-crazy-hard-to-cold-start-this-old-girl

where i cronicled and tried to resolve my hard starting issues, i would say i am definitely coming at the hard starting problem with a better battery for sure after trying all the stuff in the link i posted there, but ya to answer your question ive set fast idle, slow idle, ive had the choke valves in both positions, ive experimented and had verying results with priming the bulb, not priming the bulb, its been all over the place.

 

[emdsapmgr]

The original factory service manual says this about the minimum starting battery: a 70 amp hour battery with a minimum of 2 minutes cold starting capacity at 300 amps discharge. In 1978 the battery specs changed to more current specs: At least 360 CCA with 115 minutes reserve at 80 degrees. We used to use 850 amp batteries for all starting applications. With the advent of fuel injection, we now supply a 1010 starting battery on everything-outboards and stern drives. Keep in mind today's fuel injected engines may crank acceptabe rpm's at 9.5 volts, but the fuel injection computer usually won't fire till the voltage is over that minimum. Hardly a problem on your engine.

 

[jammer777]

Thanks emdsapmgr! i ended up going with over 800 CCA and i dont know if that did the trick this year as i did some adjustments to the carbs and fuel system, but I am starting within 10-15 seconds instead of the 30 min and a dead battery!