89 Evinrude 140 stator questions

Jh223

Cadet
Joined
Sep 26, 2015
Messages
8
My cranking battery is newer but doesnt hold a charge long when starting motor after moving around the lake a couple times it gets weak my question is isnt the motor supposed to charge the battery while its running by the stator if not what can I hook up to the motor to charge the starting battery any help would be appreciated
 

TimmyTim

Cadet
Joined
Oct 19, 2015
Messages
6
Your stator has a wire that goes to the rectifier. The rectifier is what charges your battery. You can figure out if your rectifier is good by two easy methods:
1. Your tachometer does not work (bad rectifier)
2. Your volt meter should go from 12 volts to 14-15 volts when the engine is above idle.

I had a weak stator on one of my old boats and trust me.. When your stator is going out you will know it
 

Jh223

Cadet
Joined
Sep 26, 2015
Messages
8
My boat doesnt have any gauges bought it that way im putting some in soon but currently dont have any so is there another way to tell if my rectifier is good or bad?
 

TimmyTim

Cadet
Joined
Oct 19, 2015
Messages
6
Ouch no guages. You will need to invest in a hand held ohm/volt meter if you don't already have one. You will be able to check the voltage output with it and will save you tons of money and time with the boat.

Some examples from my mistakes: My first boat I owned the tach would not work and the battery always needed charged. I bought the top of the line $200+ 1 hour rapid charger back years ago. Finally bought the repair manual and replaced the rectifier $50 (easy installation) which fixed both my tach and my charging problem. Then my $200 rapid charger was wasted money. Next my boat lost power and would stall while going down the lake. Instead of me buying a $60 volt/ohm meter to check the parts, I started replacing parts.. $800 later I realized my stator ($250) was going out. Then one day I was flying down the lake and it went to a complete halt. Another $900 later realized it was the power pack ($250). Could have saved $1200 investing in a $60 ohm/volt meter

My latest screw up.. I took a grinder to my brand new tach because the mounting screws was to long. Now it reads 0 or 7000. I am about to waste a bunch of money again if I don't invest in a repair manual soon.
 

tblshur

Senior Chief Petty Officer
Joined
Aug 24, 2011
Messages
688
jh223 make sure all your battery connections are shiny clean including the ground connections. your motor has a combination regulator / rectifier if you have an ohmn meter you can check it. cdi electronics.com gives great instruction. hope this helps.:joyous:
 

Jh223

Cadet
Joined
Sep 26, 2015
Messages
8
Yes I have a volt meter I will test it tomorrow I recently replaced all battery wires so connection should be good thanks
 
Top