Trolling Motor Shaft Length

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Measure from the top of your deck to your boat's water-line (while lightly loaded). If you're not sure where the water line is, take along a strip of edging tape next time you've got your boat out. Stick the tape to your boat just above the water line before you trailer your boat. The edging tape will peel off easily and won't leave adhesive behind after you take measurements.

After you've got a measurement from the top of the deck to the waterline, add 20 inches to your measurement to come up with your minimum shaft length. If you plan on fishing rougher waters, add another six inches to the shaft length to compensate for bow lift. For example, if your deck is 15" above the water line, you'll want a 35" shaft (minimum), and a 41" shaft for rougher waters. Since most manufacturers don't offer a 35" or 41" shaft length, you'll round up to the 42" shaft.
 
dryhorn2, I have a 50" shaft on mine. I prefer to have it that way for just the reason stated above. When I fished very often the weather don't always co-operate and I found the longer shaft length worked well during rough water times. </p>

Don't always have to lower it all the way down if you are fishing in shallow water you can just pull it up a little bit and still do well. The Procraft 180 has plenty of room to mount one like this. I personally have a Motorguide 82# thrust on mine. I like it really well cause it is variable speed and easy to control. </p>

  The little extra pull comes in handy when fishing in current or in rough water. Of coarse some of the guys I fish with rib me a little cause they have to crank the big motor to keep up....
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