Hi, I've addressed this issue in one of my past posts, but want to get into it a little more.
We have a 16' Alumacraft Xpress jonboat for the Kenai river. It has an electric start 25 4stroke Yamaha (the battery is pretty small, the only functions it performs is starting the motor and powering the boat's running lights; no bilge pump; yet).
The boat has sponsons on both sides of the outboard, mounted/welded to the transom.
1. Will an inexpensive finder perform okay on the river (in the 100.00 or under range)?
2. Where would be the best place for the transducer mount? I'm not sure if there's too much water bubbling/turbulence right next to the lower unit in the space between the lower unit/sponsons.
3. Mounting the transducer out on the back of one of the sponsons is a possibility, thinking it would get away from water turbulence.
4. Not wanting to drill holes in the transom or sponsons, can I get mount the transducer with some type of adhesive (maybe 5200)?
5. I just saw some portable fish/depth finders in Cabela's; complete with unit, suction cup mount transducer, battery & charger. Does anyone have experience with these, comments?
6. Will the small battery (with the motor running & charging the battery) power the finder and a small bilge pump (maybe a rule model drawing 2-3 amps max)?