have to replace battery need to know what the best cranking amp battery for the Yamaha F150?
21 scout w/150 yam 4str
16’ Alum. w/40 yam
… the best cranking amp battery for the Yamaha F150?
The biggest one that will fit in the available space. Never heard anyone complain about too much battery … 
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per service manual; keep in mind these are just minimums. cold cranking amps:512, marine cranking amps:675, reserve capacity:182 ah. I would reccomend going with a mellinium 24m1000 it is 1000 cranking amps and there local. The best battery for a marine application.