1982 70 Hp Evinrude Alarm!

keegand

Cadet
Joined
Jul 4, 2009
Messages
10
So I am hoping to find some help here. I have recently picked up a 70 hp evinrude o/b. Ran everyting to it in the driveway to check operation. fired up nice everything was good. I did jump start it with my car due to the dead battery. as soon as i took the jumper cable off the deep cell an alarm started on the throttle control. Now even if i turn the key to the auxilary position without even starting the motor it whales? So my quetion is why? Its not overheating, the tan heat sensor wire is in NEW condition, it isnt oil injected "dont think" i pre mix 50:1, good stream out the back. what else can cause this?? I have heard low or dead battery? Low fuel? etc..etc.. any help would be super appreciated.
 

Bass Man Bruce

Lieutenant
Joined
Jul 9, 2004
Messages
1,378
Re: 1982 70 Hp Evinrude Alarm!

I had a 1985 Johnson that would blow the overheat horn when everything was OK even once just sitting in the garage not running w/o the key in it!
OB mech told me it was a bad ground on the alarm, I upgraded.:D
 

keegand

Cadet
Joined
Jul 4, 2009
Messages
10
Re: 1982 70 Hp Evinrude Alarm!

The way this boat and motors were maintained i just have to think it is something simple! It is crazy clean! Zero corosion, so? What did you do? Other than upgrade?? lol
 

geedubcpa

Petty Officer 1st Class
Joined
Jun 1, 2009
Messages
209
Re: 1982 70 Hp Evinrude Alarm!

I had a problem where all my alarms would come on occasion - it turned out that the plug into the guage panel needed tightened up - I pushed the plug a little harder in the socket and then the problem disappeared. My motor is a 115hp 1997 johnson.
 

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: 1982 70 Hp Evinrude Alarm!

1982 only has one alarm, that is overheat. you either have a bad sensor, short i wiring, or short in the horn.
 

keegand

Cadet
Joined
Jul 4, 2009
Messages
10
Re: 1982 70 Hp Evinrude Alarm!

How do I tell? Where are the sensor wires? How do I know if it is overheating? I run it in the driveway and can still touch the motor. I mean its hot but its a running motor right. Does anyone have the wiring diagram for this 1982 70 hp Evinrude? Has updated controls nor sure what year? they look pretty new.
 

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