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Boat is a 22' sports type, probably weighing around 1.2 tons (weight of boat and trailer 1800 kilos) , motor is an early 80s Evinrude 90.
What size batteries are you running? Your motor should pull 50amp max with a recommended 60 amp breaker/fuse at the battery.
Little bit if I trimmed to where I would normally run the motor but certainly don't think it will be an issue.
Thanks for the reply. The wiring is standard and not extended, no connections has discoloured due to heat but I will re-check for that. Also ordered small
Or drain and do a vacuum test overnight