Humminbird 778C fishfinder

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makona

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Oct 25, 2010
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hi, recently i purchased the humminbird 778C fish finder,thinking that this unit would be able to not only see the fish but be able to see them changing there minds..the head unit seems alright, but man have i had some hassles with the supplied transducer..it was fitted by a marine shop and wouldnt read the depth while planning ,say 25 knots..ive re-positioned it after reading forums and youtube advice. tested it on the water had it back and fourth from the trailer to the water while i did adjustments and yet it still doesnt read on the plane..really regretting buying this unit.is there a fix...or am i able to buy a transducer that compliments the 778c unit..?.
 
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John_S

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Jun 21, 2004
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4,269
Re: Humminbird 778C fishfinder

I take it the marine shop never tested it. Hopefully, thay at least read the installation manual, and followed all recommendations.

Posts some pictures of your transducer installation. Pictures of the side and rear are good for a start. HB transducers are on the large size and usually require more expeirmentation with placement.
 
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ChampionShip

Petty Officer 1st Class
Joined
Mar 18, 2010
Messages
202
Re: Humminbird 778C fishfinder

Thru hull transducer should clear up all of that. I think you have to get it from Humminbird. We ran one for a friend's 1157 and it works at speed much better than the transom mount. We did, however, leave the transom mount on with it tilted up a bit to mark downrigger weights on screen. It is switched back and forth from transom mount to thru hull with a switch.
 
M

makona

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Oct 25, 2010
Messages
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Re: Humminbird 778C fishfinder

ChampionShip said:
Thru hull transducer should clear up all of that. I think you have to get it from Humminbird. We ran one for a friend's 1157 and it works at speed much better than the transom mount. We did, however, leave the transom mount on with it tilted up a bit to mark downrigger weights on screen. It is switched back and forth from transom mount to thru hull with a switch.
Click to expand...
thanks for your advice..its quite a big job as i have a welded aluminium deck.but if i cant get the transom mounted transducer sorted it could be an option.thanks
 
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makona

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Oct 25, 2010
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Re: Humminbird 778C fishfinder

imported_John_S said:
I take it the marine shop never tested it. Hopefully, thay at least read the installation manual, and followed all recommendations.

Posts some pictures of your transducer installation. Pictures of the side and rear are good for a start. HB transducers are on the large size and usually require more expeirmentation with placement.
Click to expand...
thanks yep it seems close enough to the specs,iam going to adjust it some more, and ive looked up the humminbird website ,and theve given some ideas as to what to check on the head unit...thanks for your reply ..
 
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John_S

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