1973 Evinrude 115 stator

[bass-fishing-muther]

I have no fire at my plugs. I have attempted to check with an OHM meter the condition of my stator. I have four wires attached to it, two yellow and two brown. I have continuity at the yellow wires. However, on the brown wires I have Isolated the circuit break at one of the wire wraps. The part I am unsure of is the electrical path to the power pack. I have purchased a manufaturers repair manual. From what I can see the power is input to my terminal strip, then to my rectifier (freshly replaced due to brittle insulation on wires). From the rectifier the two yellow wires go to my stator, returning from the stator to my power pack via the two brown wires. This then supplies power to my coils. Is this correct or have I missed something? Will the faulty stator cause no fire? Will a faulty rectifier cause the stator to fail? I believe this could cause low voltage because of a lack of charging. Will low voltage cause my power pack to fail?

 

[bass-fishing-muther]

Re: 1973 Evinrude 115 stator

The model number of the engine is 115393.

 

[OBJ]

Re: 1973 Evinrude 115 stator

Yo...mama....<br /><br />Think ya' might be searching in the wrong place. If no plugs have fire, then it's has to be something common to all plugs. This would be the power pack, the power coil, which is part of the stator assembly or the timer base. The ignition system on your engine dosen't depend on 12volts DC to keep it running. Once the power coil fires to the power pack and the timer base tells the power pack when to fire, you have spark. I would bet an I-tooth (if I had one) that the power pack has failed. If you have an OEM service manual, go to the section for ignition system and start there. With a peak reading volt meter, you can tell if the power coil is working. If it is, read the outputs of the timer base. Usually low voltage...bout 5v's or so. If you have this, then the last thing in the chain is the power pack. Keep us posted as to your progress. Thanks.

 

[Bco128]

Re: 1973 Evinrude 115 stator

whoa buddy slow down a sec.lets think this thing through.go back to your stator.if yo have decided it is a bad stator have it rewound...cheaper than a new one.Your manuel will give a range for resistance in ohms.make sure it reads within this range first.if you have found one bad..rewind it.your wireing sounds about righ but the way you stated it is a bit confusing.a faulty stator will cause a no fire or a weak fire.as to weather one will make the other go bad honestly i am uncertain.don't know if i've been any help but i hope so.good luck and i'll watch the post.

 

[bass-fishing-muther]

Re: 1973 Evinrude 115 stator

I have been working and troubleshooting this each time I can get assistance from fellow boaters. After finding the bad wires on the rectifier (an obvious replacement) the next step would be to test the powerpack. With an original Evinrude manual it is difficult to test because of the antiquated test equipment referrences in the book. Because I could not get a satisfactory test performed on the power pack a friend suggested to check the stator. We determined the Stator should be next because we reviewed the wiring diagram in the manual trying to understand the electrical path on the engine. The two brown wires on the stator have no continuity. My manual referrs to the stator as the Charge Coil. If my stator is bad I cannot get an accurate reading on my powerpack.

 

[Bco128]

Re: 1973 Evinrude 115 stator

ok if you do a resistance test,which should be described in your manuel.it will let you know if the stator is good.if the resistance reads good then continuity testing will be irrelivant, if it showes a resistance at all actually then you will have continuity.your manuel should give you a range in ohms for the test.

 

[bass-fishing-muther]

Re: 1973 Evinrude 115 stator

The charge magnets are on the flywheel, the charge coil (stator)is fixed and electricity is produced by the flywheel rotating. The charge coil, two yellow wires connected to my terminal strip, two brown wires connected to my power pack. From what I can determine is the yellow wires go to my rectifier and tach. The sensor coils have four black/white wires that connect to my power pack. I have chacked these four wire for continuity and they are fine. So, I have eight total wires from my charging system of which six are good and two are bad. On my power pack I have 12 terminal connections, #1-key switch; #2,4,9,12-sensor coils; #3,5,10,11-plug coils; #6-ground; #7&8-stator. If my sensor coil and stator tell the power pack when to fire and I have no fire at the plugs I don't understand how I can test the power pack further without having the continuity throughthe charging system.

 

[bass-fishing-muther]

Re: 1973 Evinrude 115 stator

I have no resistance on the two brown wires, I am supposed to have between 555-705 OHMs, I get nothing.

 

[Bco128]

Re: 1973 Evinrude 115 stator

ok now don't take this wrong...just trying to set things right in my head as we go along here...on the resistance test did you check with one brown and the yellow of the same group.if you check with your connections only on the brown wires you would get nothing.be patient on this and dont overthink the situation.by god i spent 6 yrs as a spark chaser on choppers for the army i will chase this one down till i catch it.problem is it tends to be painful when you catch them

 

[ledgefinder]

Re: 1973 Evinrude 115 stator

It's the output from the brown wires you're interested in. They provide charge for your ignition system. If you've got an open circuit in that circuit, there's your problem. The 'brown wire circuit' provides charge to the powerpack for all 4 plugs. <br /><br />The yellow wires just provide about 12V for your battery. Your ignition is self-charging - that is, your motor can be started with a dead battery if you use the rope pulley in the flywheel.

 

[ledgefinder]

Re: 1973 Evinrude 115 stator

Bass, the 12V charging circuit (yellow wires) has nothing to do with the powerpack charging circuit (brown wires). I haven't seen these fail often, though they do on the 1978 & newer motors. Plenty available on eBay.