Battery?

[Hydro 205]

I just put a helix7 on my boat but when I start the big motor it dims out and shuts down. So I just shut the unit off. How many cranking amps should I get. I have a 2000 optimax 200. Starting battery is old. It never has spun the motor great since I got the motor last year. Any sudjestions

[fishinwrench]

Sounds like you need a fresh battery.  Voltage is falling below 10v during cranking. 

Replace with one that is rated 1000 MCA or 800+ CCA

If you have ran it that way for awhile you'd better have the charging system checked.  Operating with a failing battery overheats the voltage regulator circuits.  

[Dutch]

If you run aerators along with electronics 800 CCA may not be enough.  I had less than a year old fail to start my Optimax so I went up to 1150 CCA and ran it for over 4 years trouble free.

[Ham]

My Pro XS 250 requires 1000 CCA

[fishinwrench]

2 hours ago, Ham said:

My Pro XS 250 requires 1000 CCA

Seriously, who fishes when it's 0° ? 

MCA is measured at 32° and 1000 is plenty for any outboard.

[Ham]

I've launched the Bass Cat when it was 16 degrees, but it did get close to 32 degrees before lunchtime. If I remember correctly, we put 50 something fish in the boat with FB jigs and jerk baits. 

[aarchdale@coresleep.com]

I hit bull shoal at beaver creek two years ago when the water was normal level at 0  high was 14.  Had some good crappie and a lot of used up hot hands and toastie toes

[fishinwrench]

Y'all are hard core! 

When the temp gets below 30° I forget I have a boat and remember that I have a wife.  ?