I bought a new Lowrance Mark 4 last winter. Now the HDI models are cheap as well, Here''s one $129
http://www.ebay.com/itm/Lowrance-Mark-4-HDI-Chartplotter-Fishfinder-Broadband-Transducer-/201380999719?pt=LH_DefaultDomain_0&hash=item2ee33e3227If you want a little new models the elites run about $100 more.
Installation was easy. I mounted my transducer temporarily in the bilge but will move it next winter out onto the transom. Mounting the unit was easy as well - Buy a RAM mount, (About $40) and I mounted mine to the right of the Gauges after drilling a 1" hole thru the fiberglass. I then lined the hole with split loom to make it look better and not cause friction on the wires.
I used the ram mount as it allows the unit to move around more, and it also fit there better.
Let me know if you have any other questions.
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2008 Four Winns h180 Bowrider
3.0 Volvo Penta
2013 Dodge Durango HEMI
