Charging issue/ Stator testing procedure?

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Hi308

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1985 185HP Evinrude. Tach gave out, replaced with new one (teleflex) set to 6 pulse, still no signal. Tested continuity of signal wire from tach to engine terminal strip, all good.
Tested Stator per instructions @ this link
http://forums.iboats.com/showthread.php?t=190636
Tach did not work even on the yellow wires at the terminal. So here's my question before I go spending MORE money! :facepalm: Is it just the rectifier/regulator, or could it be the stator not giving the regulator any juice in the first place? The engine runs fine and strong but then again it's probably working off of the battery. I tested voltage at the battery and it's not increasing even under acceleration. So how do I find out if the stator is working and what am I looking for AC or DC on which wire? :confused:
 

Big flop

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Re: Charging issue/ Stator testing procedure?

Could be ether. Start by unhooking both yellows from stator &
Ohms test . Peek under flywheel at stator & look for burnt
Wires around the coils.
 

Hi308

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Re: Charging issue/ Stator testing procedure?

I was thinking of looking at the wires under the flywheel but quite frankly I'm not looking forward to removing the flywheel. How many Ohms am I looking for?
 

SparkieBoat

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Re: Charging issue/ Stator testing procedure?

again..I have found OHM test to be very unreliable when testing outboard electronics...especially the stator
 

Hi308

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Re: Charging issue/ Stator testing procedure?

Tested for Ohms and got no reading..... :mad:
Gonna try for AC voltage with the engine running......in the morning of course. :cool:
 

Hi308

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Re: Charging issue/ Stator testing procedure?

Thanks Sparkieboat! That guide is a great resource!
 

SparkieBoat

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Re: Charging issue/ Stator testing procedure?

yea..it should be a sticky. your welcome..feel free to post any questions once you start testing.
 

Hi308

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Re: Charging issue/ Stator testing procedure?

OK, tested the yellow stator leads, still connected to the terminal stip, while the engine was running. AC voltage was ran between 1.0 to 1.4 in the begining at idle, but later got really irratic going from -0.0 to 15.4 at idle! :eek: WTH? I thought! Now the engine does sputter a bit on idle, and always has, even back when it was charging, but when you put her in the water, she purrs like a kitten. :p
 

Hi308

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Re: Charging issue/ Stator testing procedure?

Another thing, Under the flywheel the magnets do ride up and down a bit if you reach up in there and move them, however i cant move them side to side.
 

wilde1j

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Re: Charging issue/ Stator testing procedure?

If you didn't get > 30 VAC across the yellows, the stator is clearly bad. BTW, the magnets shouldn't move at all. They can be refastened with a strong epoxy, after cleaning to shiny metal first.
 

Hi308

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Re: Charging issue/ Stator testing procedure?

OK I'll pick up a DVA and see about gluing those magnets back in place. Will post results. Thanks Guys.
 

jvalhenson

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Re: Charging issue/ Stator testing procedure?

i am having the exact same issue with my 225 ocean pro right now....my stator looks good so I took the chance and ordered a new rectifier regulator(both stator and rectifier have gone out before about 2 years ago) since I dont have the adapters to test them with...just gambled on the rectifier and if its the stator then will just have to get one and will have a spare rectifier. But mine is doing the same thing.....runs great but not making any juice...just running on the batteries.
 

SparkieBoat

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Re: Charging issue/ Stator testing procedure?

for goodness sake spend $30 on a DVA adapter and go to the site listed in post #4 and actually test your parts before changing...this guessing stuff just never seems to go well, except for the parts dealers.
 

Hi308

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Re: Charging issue/ Stator testing procedure?

Well I suppose you could bungee a solar panel on top of the motor:).....Just Kidding.
 

jvalhenson

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Re: Charging issue/ Stator testing procedure?

The reason I simply ordered the rectifier/regulator is upon inspection of the stator it looked fine....nothing burnt or damaged looking and the magnets in the flywheel are all good. Reviewing my manual I can find nothing that says that the stator going out will cause the failure of the tach....it only says if the tach goes out then replace the rectifier/regulator(if it is not the teach itself that is bad of course.) I realize that the rectifier gets its power from the stator......however if it is the stator that is bad would the rectifier still not be receiving power from the batteries since it is sending power to them? Or is it somehow a one way flow? So would the tach not still work at least for a time on the battery power if the rectifier/regulator was functional but the stator bad? Not trying to argue or anything here......this is just what I was basing my diagnosing the issue on so see what yall thought on that. Just cant find it anywhere that it says the stator can cause tach failure but it certainly would if the power from the batteries is not flowing back to the rectifier to run the tach. Normally I would just have pops look at it since he is the mechanical guru of the family and has every tool and testing device known to man but since he is Tupelo working and all his stuff with him I gotta just wing it on my own a while.
 

SparkieBoat

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Re: Charging issue/ Stator testing procedure?

you may very well have actually needed the regulator/rectifier..it can go bad and burn up your stator..this is why a full DVA test of your entire electronic system is always a good idea when something is wrong. but again we are still just guessing with out the proper DVA test.
 

Hi308

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Re: Charging issue/ Stator testing procedure?

Ok Gentlemen,
While I wait on my DVA to arrive, I wanna run something by ya'll. In Automotive applications when you disconnect the battery the alternator assumes the job of providing power to the engine, the ignition coils, distributor, ect. If that alternator is bad the engine quits. Now I've started the outboard and let it warm up, switched all batteries to OFF and the darn thing keeps running! Does a darn good job too, even under acceleration. Now I assume that means the stator is working because it supplies juice to the two power packs as well as the rectifier. Does that mean the stator is OK, or are there seperate coils for each function? For example, two coils for each power pack and two for battery charging?
 
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