i got myself a hummingbird 565 and got started on the install last night. im wondering can i use the original transducer for the trolling motor? i remember hearing somewhere that your supose to get a special transducer for the trolling motor bracket.... anyone know if i can use the original on a trolling motor bracket? hoping to get this thing up and working for sunday.

What transducer do you have now?  Puck or skimmer?

Both will work on a TM.  My next TM mounted graph will have a puck, although there is something to be said for a skimmer.

i have the transom skimmer, and i see now i can use it but i wonder if i should go ahead and get the puck?

Humminbird will exchange your scimmer for a puck for free, just follow the transducer exchange information in your manual.  No matter what style you go with both will perform the same.

i have the transom skimmer, and i see now i can use it but i wonder if i should go ahead and get the puck?

How is the lower unit on your motor configured?  Skeg forward or skeg towards the rear.

If it is pretty far forward, I would suggest using a puck.  The skeg will protect it pretty well.  

If it is towards the rear of the lower unit, then I would go with a skimmer.  This will allow the transducer to 'roll' with any bottom contact.

YMMV...

umm, i have to look but i have a minn kota all terrain trolling motor