93 Mariner 25hp?

Question:
I have a 25hp Mariner and it skips at 3/4 throttle and up...it has a new prop and not sure if it's cavitating. Anyone have any ideas??

Answers:

Who would i contact to find out what an real old boat motor is worth?

Sounds like ventilation not cavitation. Is the motor set all the way down on the transom or do you have it to far up. Is it a short shaft on a long transom ?

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"skip" is a vague word. does the engine misfire? if so, that particular unit's trigger wires tend to break or crack up near the flywheel. an electrical tester will work. hook it up for resistance and move the timing arm all the way forward and back several times.

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Minn kota 824 autopilot trolling motor?

Sounds like maybe just a spark plug misfiring to me...

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