depthsounder chartplotter turning off

[chandler130]

Hey guys, was chasing some help with an electronic fault on my boat. Problem is when i start my engine my depth sounder and chartplotter turn them selfs off. I have a furuno 620 sounder and a navman 5600 tracker plotter. My engine is a suzuki 90 4 stroke.

Sometimes it turns both off, sometime only one and sometimes none. But it is really annoying have to start them back up each time you move spots. My only thought is that my battery might be starting to fail and it is taking all the battery has to crank the engine.

althought the wires for the sounder and plotter are quite small so Im guessing they only need very little power to start. Was wondering if anyone know wat causes this and has anyone else had the problem???

Thanks

[rosco1974]

yeah mate its your battery.had the same problem with my 585 and lowrance gps.when i started my 140 zuki they would both turn off.changed my battery last week and fixed the problem

cheers rosco

[Bi_polar]

X2

[AZZA]

I 3rd that

[chandler130]

haha well that solves that, love it when its an easy fix. Got a quote for a new n70 seamater today about $150 but thought i would make sure before i bought it. Seemed suss how I have no probs cranking the motor. Thanks guys

[Malcolm]

Interesting at least that is some warning that the battery is on the way out

[aussie123]

Your battery may be fine and you just have dirty terminals creating a bad contact.

Clean all the battery terminals and wires,clean the terminals on the master battery switch if you have one installed and clean any terminals on the units wiring first and that may save you the cost of a new battery.

If you have wing nuts on your battery terminals throw them away and use plain stainless nuts as wing nuts can cause real bad contact issues at any time.

[chandler130]

thanks mate, but got my mate to load test it and it only pulling 380 cranking amps and its rated at 575 so hopefully a new battery should sort the problem out.

[mick fillet]

i 4th this too

also if ya running twin batt set up. and ya house batt is a deepcycle with out any cranking cpababilitys and you run both batts together to crank you can bugger the deep cycle and vise versa if ya motor is off for a long period of time while camping out all night etc and ya got every thing blaring all lights on radio the constant current draw can bugger up the crank batt.

use the crank batt to start motor you can swap issolater switch to both too charge both batts up at the same time i havnt had a prob yet. have your house batt going straight to the house electronics through a fuse board but wired up to the isolator switch for charging from the motor and as a back up emergency for starting the motor.

mick

[chandler130]

I was going to put dual batteries but now I know I can quite easily pull start the 90hp suzy im not going to worry.