looking for advise

[greenblast]

this was my first boat. i just dug it out of the cellar. i have 6 8.4 3600 nimh batt a couple of 11.1 lipos and some 7.4 lipos as well i just picked up a 60a brushless speedo on the swap shop from cjs i have a bunch of small props can anyone recommend a motor for reasonable speed and run time

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[JimClark]

what size is it

[greenblast]

its a blast approx 21""