Minn Kota MAXXUM 65 problem

[mt72916]

Originally I had a bow mount 55 maxxum trolling motor till I accidentally damaged it. A marine dealer converted my boat to a 24 volt trolling motor using a used 65 lb with a variable speed foot control but he used my 55 lb mount. I don’t know the serial number to use for parts.
Now that trolling motor is giving me trouble.
It's intermittantly not working. Once I let it drop down in the mount and it worked for a short bit then it quit again And wouldn’t power up even with the momentary switch full on. then it took a spell of working normally till it shortly quit again. Sometime later it would only power up using full on position. I Don’t know if repair is feasible and cost effective or should I get a new variable speed maxxum 70 lb or maxxum 80 lb.

its on a ranger 175VS
trolling motor skeg is in the front not by the prop.

[CatFan]

Loosen one of the screws behind the prop and see if it is wet or rusty.

[Jonestrollingmotor]

As Catfan said, remove the prop and one of the bolts and look for signs of water intrusion. Call me if I can help.
John

[mt72916]

Loosen one of the screws behind the prop and see if it is wet or rusty.

you nailed it . screw is wet just starting to form slight surface rust.

(also the used 24 volt was installed labor day weekend 2014.)