Lookinf for a manual for a minn kota model 55d

Try Minn Kota direct. They have a great spares department or possibly eBay.

https://www.google.com/search?q=minn+kota+mag+28+parts

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You can get the appropriate pins in the prop not kits sold by minn Kota or thru major retailers.
Trolling Motor Replacement Props Minn Kota Motors
You will find prop nut kits here just follow the link.

call the 800 number for minn kota on the head of your unit for questions or technical data. they will send you a copy of your manual also if you dont have it. i am not sure what your question is so ask them to save yourself time.

max is 56amps on 24v system

55 is a 12 volt system northland marine has diagram.

According to: http://www.northlandmarine.com/MinnKotaMotorControlBoardAssm.htm

*Note: Newer model trolling motors have serial numbers beginning with the two-letter prefix MK (Minn Kota), followed by a two-letter year code. MKAB .......... 2001
MKAC .......... 2002
MKAD .......... 2003
MKAE .......... 2004
MKAF .......... 2005 MKAG .......... 2006
MKAH .......... 2007
MKAI ............ 2008
MKAJ ........... 2009
MKBA .......... 2010 A serial number with the designation MKAB denotes a
2001-motor and MKBA would be a 2010-year model

HOPE THIS HELPS

Contact the people at this Email address. Minn Kota <[email protected]> The address is between the brackets. They emailed me a manual for a different trolling motor. They are nice folks. It will take up to a week for you to get a reply.