i see i see. goes from $1,000 and some change for the 798 si to $1,499 for the 898 si. for $500 extra is all you get is 2" bigger screen? is there anything different from those two units thats worth the added $500? an for mounting and running all the wires, is it easy to do yourself, or have a professional do it? i have a cheap fish finder on right now, that actually came with my boat, but i only use it for water depth and temp. i really want to upgrade to a DI or SI unit that i can actually see structure and fish! but not sure if its worth the money... i really want to stay under $1,000. but having a hard time narrowing the best units down for the money.
for mounting the transducer, what happen with yours? you said if you mount it improperly you will get false readings or not true readings. how do you know when its set correctly?
thanks!