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Old 08 November 2006, 03:50   #1
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Nauti Buoy's Avatar
Country: UK - England
Town: West Wittering
Length: no boat
Join Date: Jun 2004
Posts: 1,447
Garmin 298c connected to Icom M421


My Dad has had his Garmin and Icom installed, they have "apparently" wired it together correctly. Am I correct in thinking, also reading the handbook, all we have to do is go into the "COM" section on the GPS and turn on NMEA Output and the two should talk. This is what he has done but the ICOM does not see the Garmin.

Personally I think, yet to see it, that it is not wired correctly.

or if anyone can let me know what wire should be connected to what I will check tonight.

Thank you
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Old 08 November 2006, 10:17   #2
Country: UK - England
Town: ramsgate
Boat name: Micki Dee Bee
Make: Ribcraft Seasafari
Length: 9m +
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Send a message via MSN to Jon Brooks

Make sure the outer of the phono on the Icom is connected to the ground of the Garmin.
Either to the Garmin case or to the negative supply to the Garmin.

Its a tad of a quirk but if its not then it won't work

Best regards

Jon Brooks VSMM. Marine Mammal Medic, PBI, SRC Assessor,PWC Instructor.
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Old 10 November 2006, 18:04   #3
Country: UK - England
Town: sheffield
Boat name: blue marlin
Make: avon 620 adventura
Length: 6m +
Engine: 150 hp suzuki
Join Date: Aug 2004
Posts: 137
re garman to dsc radio

i have a garman gps and have transfered this to 3 ribs over the years and each time had to phone garman to get the correct wiring as the instruction book says 1 thing . garman say itsa problem as some dsc radios are different wiring, i now have just bought a boat(rib avon adventura 620) with no dsc radio gosh was i not pleased no dayssat in the boat to do the wiring again
good look
have you sorted it out now
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