Yamaha drawing power with key off?

[I Fish GS]

My 02 HPDI 250 is drawing power with the key off, were should I start. When I disconnected the neg post of batt it sparked and put a volt meter between bat post and neg engine cable it showed 10volts. I don't hear anything running fuel, oil pumps ect.

Brian

[OkieBoatMech]

Do you have a "Master Switch" for main boat power?

[I Fish GS]

I have master power for boat power ranger key pad, GPS, livewells ect. The main and kicker motors go straight to battery. I disconnect main motor at night. At the end of the day when I start my main motor it will barely start and kill my gps. I have new 29 group bat. I don't have a good shop to take it to and don't want to take it to a place where they just replace parts at my expense.

thanks

Brian

[OkieBoatMech]

Wow thats a big voltage drop for a new battery.Have you had your battery load tested yet. Ranger FLW Tourn. boats have "Master Switch's" installed for the engine side also. Checked your engine side power cables already I assume.

[Bassn81]

My boat was doing the same thing with my 200 HPDI in my Ranger. I bought a Perko swith that can handle the draw. All you do is run the positive cable from the motor to the switch and a cable from the switch to the battery. When I am done running for the day I turn the switch off.. Works great.

[oldbasser1]

If you have GPS on your boat it will draw power even with the power off unless you have perko or other type master shut off switch.

[sapnfish]

Get a dual battery switch. One Battery for main engine and the other for acc. Turn off when not in use and you will be fine.

[I Fish GS]

Thanks for the help. I have been disconnecting batts when not fishing. The thing is that when I'm out fishing my 4-6 hours my batt is drawn down that at the volts are under 12v, that when I start the motor the Lowrance's all shut off, then by the end of the day the motor will not start. My trolling batt is in same compartment so I just jump it. I think previous owner had same problem since boat came with jumper cables.

When I hookup batt to motor sometimes I can here a click like a relay but not all the time.