"Help..Cranking Amps For Portable Starter"

Lunder

Recruit
Joined
Dec 7, 2002
Messages
2
I could use some help.....I am investigating portable starters/chargers like units listed by West Marine, Roadbot and many others ranging in price from $50-$225. The question I have, is how many cranking amps do I need to start a Merc 175 Opti if battery is dead. I am thinking this is a viable option to installing a second cranking battery or relying on trolling motor batteries with jumper cables as many posts here have discussed. Some of the variance in prices is due to additonal lights etc on the unit and listing amps but inferior units providing cranking amps which may be significantly less.....thank you in advance for your help.
 
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