Here is a deep cycle non cranking battery that says it has 900 CCA output. More than enough to start most any Yamaha outboard motor.
I don't know what model and brand you have.
Interesting to me that they comment about it starting a 200 HP Yamaha when many many Yamaha V6 VF200's, F225's, F250's, F300's and V6F350's use the same starting motor. Same amount of current to crank and start the motor.
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