fishfinder transducers

nik · 13 September 2009, 14:24

I dont if anyone here knows much about transducers, but. I have a garmin fishfinder "240 Blue", which is now full of water and knackered.
By chance I also have a garmin ff 80, I tried it on the plug in the boat and it worked, the trouble is, its a different shape and not easy to mount.
The knackered one is an old model and hard to find.
What I would like to know is if the transducers are common to a lot of garmin fishfinders, if so I could get a more up to date unit and simply plug it in.
If your thinking "why not change the transducer?", Its because it is under the engine and a real git to get at.

Thanks, Nick.

giddyup · 13 September 2009, 21:13

I fitted a 550 and use the transducer that was fitted when I put a 100 blue on a few years ago. Works fine. I would give it a go.

nik · 13 September 2009, 22:12

I have looked into it a bit more, and the 240 blue uses a 50/200 Khz transducer, the ff80 uses a 200Khz only and more recent garmins use 80/200 Khz. I am not sure what conclusions I can draw from that.

giddyup · 13 September 2009, 22:42

Can't help you there, both the 100 and 550 use dual wavelength. Stick it on and see what reading(s) you get. Must be worth a try before you buy.