Is there any way to modify in order to get more power/thrust out of a mk 30lb other than stock? or can you take a moto guide 80 lb., bow mount foot control, shaft and motor and combine it with transom mount 30 lb minn kota top end? thought i'd ask before i tried. also my 30 lb mk tends to fade/slip in and out of 5th speed, and tends to run rough in water regardless of load or speed, runs smooth no vibration out of water.

SOURCE: Minn Kota electric motor MKJI1033962

Best to call Minn Kota direct for the manual Youll need your serial number thrust of motor and shaft length..
800-227-6433 they will help you with any technical questions.

Parts can be purchased from this dealer...There are schematics on the site for review....
http://www.northlandmarine.com/MinnKotaQuickRef.htm
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SOURCE: what size battery does a minn kota 565 5 speed

12 Volt

SOURCE: How many amps does a minn kota 80lb thrust motor draw ?

max is 56amps on 24v system

SOURCE: I have a minn kota

Ok, I have done this quite a few times so take heed, I am not familiar with the MK65 but I am sure the principal is the same on all of these motors..
Take off the top half of the plastic head and look on the center shaft. Your two foot control wires wrap around a plastic spool which sits on the shaft with a spline fit. If you have not done this before, get a pad and pencil and draw the way the wires come in, lay and attach in that plastic spool - because when you pull it off, if they come off you will be scratching your head wondering what the hell you did. You can figure it out but why think if you don't have to, its not as simple as it sounds because spool rotates, the wires wrap round and round etc.. Slack your cable tension adjustment screw in the footpedal all the way off, then what you have to do is slide that plastic spool off, and rotate it until you have the right position. The object of this, is to have the motor set pointing straight ahead, with your footpedal in the middle incline position, so you have full travel in each direction up and down. When you do this, you have to be aware that with the cables loose, they can come off the cams in the footpedal if you don't keep tension on them. Good luck.