small current drain with engine off

S

skiwake130

Cadet
Joined
Apr 29, 2005
Messages
19
Yamaha BETO 130Hp 2001<br />I replaced the battery and whilst the cables were disconnected, I decided to check for any parasitic current drain. The engine was drawing 9 - 9.5mA as a rythmic constant pulse between 9 and 9.5mA.<br /><br />Is this normal and should I disconnect the battery lead to prevent battery drain?<br /><br />David
 
B

bigbrownbuku

Master Chief Petty Officer
Joined
Sep 17, 2004
Messages
885
Re: small current drain with engine off

was the boat in the water? try disconnecting the main harness plug, located in the lower cowl, starboard side. do the test again. does your boat have a set of digital yamaha guages?<br />boats should have battery switches.
 
Silvertip

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,762
Re: small current drain with engine off

If your boat has an AM/FM Stereo with electronic tuning and a built in clock, the clock and station memory draw power constantly. Not much, but certainly in the range you mentioned.
 
S

skiwake130

Cadet
Joined
Apr 29, 2005
Messages
19
Re: small current drain with engine off

The boats is on the trailer in the yard. Yes it has the didital gauges. No other equipment such as radio fitted.
 
R

rodbolt

Supreme Mariner
Joined
Sep 1, 2003
Messages
20,066
Re: small current drain with engine off

the digital speedo and the fuel management both have memory circuits and some regulators will have a reverse current through the diodes. thats why we always reccomend a battery switch and ditch any "computerized" bilge pumps. they drain as well even when they are not cycling.
 
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