1990 evinrude 40 horse wont charge te40elesr

[patrickj]

Ive got a bass buggy with a 40 horse evinrude motor, this last weekend we were out on the water and it started fine a few times then wouldnt crank, so we got a jump and it fired right up and ran non stop until we turned it off... long story short the battery only had 11 something volts which i assume isnt enough to turn the motor over. My question is where do i start looking. The battery is good i took it today and had it tested its only about an 8 month old interstate marine battery. When the motor is running i tested across the 2 posts of the battery and it read 12.6 with the motor off it was 12.4... i need to know an easy way to test the stator to see if it is putting out anything. I thought if the boat would run when the battery was unhooked the stator was fine but i may be wrong. also how can i test the rectifier. any help would be greatly appreciated.

 

[Will Bark]

Re: 1990 evinrude 40 horse wont charge te40elesr

First are the battery connections under the cowl clean and shiny bright and tight? If you are showing some charging then it could be that you have a bad connection between motor and battery. Second, I don't think you are to ever run a motor without a battery connected since that is a good way to fry the rectifier. CDI electronics online have great procedures for doing the tests you want to do. Good luck

 

[patrickj]

Re: 1990 evinrude 40 horse wont charge te40elesr

yea i learned after i unhooked the battery that was a bad idea but luckily i only had it un hooked for a matter of seconds. How to i go about finding a test for the stator and rectifier. Also is a boat not just like a car when the motor is running if you test across the battery it should show 13+ volts and that shows you that its charging? i cannot find any tests on their website.

 

[Will Bark]

Re: 1990 evinrude 40 horse wont charge te40elesr

Google up "CDI Electronics" and find your engine and the test procedures. My 150 Johnson does not jump up to 13+ volts rather it "crawls" up to 13+ volts after it has run for a awhile and replaces what charge it took to start the engine. It is a 1987 and is charging 2 batteries.

 

[patrickj]

Re: 1990 evinrude 40 horse wont charge te40elesr

ok ive been to their site, i cant find anything about testing a stator or rectifier only how to install them. any way someone can shoot me a link. I took a look at the boat yesterday it shows 12.5 running or not. Then once you wear the battery down the boat will fire up but has trouble idleing. any help would really be appreciated. my voltage never moves weather you run the motor for 10 seconds or 10 minutes the only time it changes is after you crank it a couple times it will go down .1 or .2 volts

 

[hidef]

Re: 1990 evinrude 40 horse wont charge te40elesr

Most likely item # 65 is bad the voltage regulator. To verify the stator you need to disconnect the two yellow wires the go to the voltage regulator from the stator. To test the stator use an Ohm meter across those two yellow wires. Your resistance will be very low, if it is high or reads open then the stator is bad. You also want to check the resistance from each yellow wire to ground they should both read as open. If the do the stator is good. To test the voltage regulator you want to do resistance checks between each yellow wire and the red wire you want to check the resistance going in both directions it should be high one way low the other.

http://www.marineengine.com/parts/j...gnition+System+-+Electric+Start+Te-ttl+Models

 

[patrickj]

Re: 1990 evinrude 40 horse wont charge te40elesr

ok i took it apart and the stator shows .04 ohms from each of the 3 yellow wires to another of the yellow wires and also from each of the 3 yellows to ground and they were open. so i checked the rectifier/regulator and from each of the yellow wires to the red they read open. so that sounds to me like a bad rectifier. am i on the right path??

 

[lmuss53]

Re: 1990 evinrude 40 horse wont charge te40elesr

The rectifier wires will be open in one direction and show current flow in the other. Look at the FAQ at the top of the page for rectifier testing procedure.

Your stator sounds about right I think mine from my 50 had real similar numbers.

 

[patrickj]

Re: 1990 evinrude 40 horse wont charge te40elesr

ok guys... i bought a rectifier and before i put it on tested the resistance from each of the 3 yellow wires to the red, and the new one still showed no resistance on 2 different meters. so i went ahead and replaced it, still no charging. So i ran back to the shop and got a stator, got it put on now when th emotor is idleing it shows 12.4 volts, when you put it in gear the highest it will ever go is 12.6 volts is that charging? doesnt quite sound like enough to me but its more than it used to do.

 

[Haffiman]

Re: 1990 evinrude 40 horse wont charge te40elesr

Should on a fully charged battery show around 14-15 volts at 3000 rpm.

 

[patrickj]

Re: 1990 evinrude 40 horse wont charge te40elesr

ok i never tested it at that high of rpms the highest i went was probrably 1500 rpms max, even at 1500 id think my reading would be higher than 12.6 volts but i will take it to the water and run it wide open and check it. also i assume it will charge in neutral thats how i was testing it. if it still doesnt charge where else can i look, ive got a new battery new battery cables i tested the voltage at the starter solenoid to make sure my cable werent just bad and it also never goes above 12.6. maybe my rpms arent high enough

 

[patrickj]

Re: 1990 evinrude 40 horse wont charge te40elesr

ok i tested it at the river last night and when im at wide open throttle i get 12.7-12.8 volts is that enough to charge the battery?? it has a new stator and rectifier what else could be wrong. thanks