Furuno 1871F match with TM265LH

No. That is a dual freq CHIRP and the sounder is Single Freq CHRIP unit. The TM265LH is designed more for the TZT3 internal sounder or the DFF1-UHD.
 
only reason why I asked is because I came across a old stock previous generation doesn’t have any pin connectors only cables Still in box brand new on eBay for a real good deal. Thought why not have one next to my tm185M
 
If you scroll down on the product page for the GP1871F you will see a list of compatible transducers. Ill link the page below for you so you have it for future reference :)
 
While you could wire only one of the freqs to a pigtail (HF or LF) and try to use it; there is no software setting that would properly give the right power and freq sweep to properly support it. The B265LH will be a deal for someone with the TZT3 (12, 16,19, or BB) or someone with DFF1-UHD. It just isn't the right fit for the GP1871F/GP1971F.
 
The TZT9 is just like the GP1871F/GP1971F as a single freq CHIRP unit. If using the TZT3 it would be need to the one of the models that Sparky listed above. (12,16,19, BB)
 
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