1985 Mariner 3 cyclinder, 60HP stator problem, I think

[speckman6408]

Hello Guys: I have the above described motor whose model # is 7060525. I have a question concerning the stator.
This motor was running fine and all at once it quit--glad I had it in the tank instead of on the lake! So I got another
stator, trigger assembly, rectifier, and coil. It cranked up and ran good for about 4 hours-I cranked it at various times
over about 6 days and all at once it quit. I am not getting any fire on any plug. Looks like it is the stator again--what
would be causing the stator to go bad again. I do have a manual and it says the that the resistance between blue and
red leads of stator should be 5400-6200Ohms. When I tested my leads with them disconnected from the switchbox I
I get a reading of 4850Ohms. I am using a #2524 GE multimeter, would using this cheaper multimeter make a difference
in the reading or do I need a new stator? Also, I tested the resistance between the red stator leand and the engine
ground and I got a reading of 145Ohms and according to the manual this is withing the range which is 125-175Ohms.
Sure would appreciate any help that anyone could give. Thanks beforehand!

 

[CharlieB]

Re: 1985 Mariner 3 cyclinder, 60HP stator problem, I think

I would rig a dial indicator to the outside edge of the flywheel and see if there is any side play in the upper bearing which could allow the flywheel to contact the edge of the stator. This would in effect 'marry' the magnet fields of the flywheel to the stator and nullify and voltage generation.

Of course you could simply pull the flywheel and closely inspect the inside for any contact marks, rubs, same with the outside of the stator.

 

[speckman6408]

Re: 1985 Mariner 3 cyclinder, 60HP stator problem, I think

Charlie B, thanks for your response! I have pulled the flywheel and there are no signs of wear
or scarring and the old as well as the newer stator does not show any signs of metal to metal
wearing. I have not tried the dial indicator but when it was running I looked carefully at the
flywheel and I could not detect any unusual movement and I did try to move the flywheel back
and forth with both hands and could detect no movement that would indicate a bearing problem.
Any further help appreciated.

 

[CharlieB]

Re: 1985 Mariner 3 cyclinder, 60HP stator problem, I think

Is the new stator coated in black resin/epoxy?

CDI Electronics quit coating their stators long ago. They found the coating acted like insulation and the coils would heat and fail at a much higher rate than the simple clear laquer insulation.

So what stator did you put on? Which brand, Merc, Mallory, Sierra, CDI?

How old is the new stator? If barely a year I would be calling the manufacturer and asking questions why it died this early.

 

[speckman6408]

Re: 1985 Mariner 3 cyclinder, 60HP stator problem, I think

Admiral: Thanks again for all the help and sorry that other matters kept me from getting
back to my motor problem. The stator is coated in black resin/epoxy and I think that it
is a Mercury Quicksilver. The number is 398-5704A4 and no I did not buy it new--it was
one of those deals where a person said it was a good one and I took his word for it. He
did not tell me how old it was--but I can tell that it looks almost new. Any other advice
concerning my non-running motor would be greatly appreciated. Thanks

 

[AChotrod]

Re: 1985 Mariner 3 cyclinder, 60HP stator problem, I think

Ill have to double check the part number but I have a brand new CDI that should work for you. I ordered the wrong one by accident went to install it and the connections were wrong. Since I had tried to install it they would not take it back so I had to order a new one. Let me look into it and if its for your motor Ill sell it for 50% of what I paid.

 

[AChotrod]

Re: 1985 Mariner 3 cyclinder, 60HP stator problem, I think

Sorry I have CDI part number 174-2075K 2 which wont work on your motor.

 

[CharlieB]

Re: 1985 Mariner 3 cyclinder, 60HP stator problem, I think

When I get home from the VA Dr tomorrow, Wed, I can look in the barn to see what #'s I have in the cabinet. I'm pretty sure one is the same 2075 but not sure which the other one is.

I thought one of the CDI's was pretty much a generic for a lot of the 3 and 4 cyl models.

Both of mine are new, in the box. Customers didn't come back to pick them up after I had already ordered them.

If I find the correct one I will PM you with details, then you decide.

 

[speckman6408]

Re: 1985 Mariner 3 cyclinder, 60HP stator problem, I think

Gentlemen: Thanks for all the help! Mr. Charlie I will wait to see if you have one. The numbers
that I have for the stator are Mercury 398-5704A7, Sierra 18-5865, and CDI 174-5454K 1. Will
cranking the motor with a bad stator destroy the trigger assembly, rectifier, or switchbox? All of
you guys are great for the help you provide!

 

[CharlieB]

Re: 1985 Mariner 3 cyclinder, 60HP stator problem, I think

Sorry, I don't have any of those #'s. I have a new Merc Red, a used Merc Red, and another used Merc, but none for your motor.

How have you tested to determine that it is a stator you need?

DVA test cranking is the only truely reliable test. And even then you must be sure that cranking speed is at or above the minimum of 300 RPM. A fully charged battery, CLEAN cable connections, both ends, including the starter cable. Sometimes even cleaning the starter commutator and lightly lubing the bushings. These things can make a LOT of difference in cranking speed and greatly increase spark intensity with proper stator voltage.

 

[1Zorro1]

Re: 1985 Mariner 3 cyclinder, 60HP stator problem, I think

I had the same trouble with a Merc./Force 70 triple. I had to buy an updated stator and cdi kit which was actually a Merc. retrofit. Worked great after that. Was a couple hundred bucks.

 

[speckman6408]

Re: 1985 Mariner 3 cyclinder, 60HP stator problem, I think

Thanks Guys for all the help! Mr. Charlie I do not have a DVA tester--so I checked the resistance between
red and blue leads from stator to switchbox and got a reading of 4850 ohms and my manual says I need a
reading of 5400-6200. The reading between the red lead and ground was 145 ohms which is within the
range according to my manual. I have a fully charged battery-clean cable connections with good cables,
and the starter spins the flywheel really fast but I will remove the starter and give it a good cleaning and
lightly lube the bushings. And I am going to "bite the bullet" and buy a new stator and go from there.
Thanks again from the bayous!

 

[CharlieB]

Re: 1985 Mariner 3 cyclinder, 60HP stator problem, I think

NEVER ASSUME anything with electrical parts. There is NO RETURN. And it can get expensive replacing parts until you finally get spark.

Ohms testing is merely a rough guide, those numbers are not carved in stone. This is the reason for DVA testing, it is truly the most reliable indicator.

A stator and even a trigger are generating coils, driven by the flywheel magnets causing a voltage to be produced. If both the stator and trigger are generating adequate voltage then the switchbox works as a voltage storage device, routing that storage voltage along the path triggered by the trigger voltage.

An AC volt meter isn't very accurate to read the very rapid 'pulse generated, a DVA adaptor capturs voltage and stores it long enough for the meter to make a stable reading.

A DVA adaptor can be built quite cheaply, far less than $20. Search these forums for 'DIY DVA Adapter', you should find the plans.
http://forums.iboats.com/showthread.php?t=374544
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ISSUU - CDI Electronics Practical Outboard Ignition Troubleshooting by CDI Electronics

A few dollars spent on properly troubleshooting your ignition can save you HUNDREDS in un-necessary non-returnable electrical parts.

Fill out your profile with your location. There are a lot of us out here all over the globe that don't mind lending a hand to help a fellow boater figure out what is wrong. Someone could be close enough to drop by with a decent DVA meter and show you if you stator needs replacement, or if it is something else. You could own him a beer.

 

[speckman6408]

Re: 1985 Mariner 3 cyclinder, 60HP stator problem, I think

Mr. Charlie: I do appreciate all the help that you have given me as well as all the others.
If any of you guys are ever in my area, I will be glad to treat you to a cup of Louisiana
coffee or a good cold coke or whatever. I do not drink beer so I do not offer it to others.
Admiral I am going to go out there to my shop today and start from the beginning and
check all the points in the CDI Ignition Trouble shooting instructions as well as recheck
all of the electrical connections. I will not be able to do it today but I am going to get the
components to make a DVA or buy one, If there is someone in the Amite, Louisiana area
that could help me with this "mysterious motor" I would appreciate a reply. And yes sir
I did fill out the remaining parts of my profile. I know this is a long reply and appreciate
everyone's patience in reading it. One last question-I have checked the resistance on my
stator and trigger assembly while I had them off the motor and then I checked the
resistance with them on the motor and the resistance is either non-existent or different
from the readings I got with the components off the motor. Is this normal or not?
What a helpful group of guys! Wish all of you were my next door neighbors!

 

[CharlieB]

Re: 1985 Mariner 3 cyclinder, 60HP stator problem, I think

If you tested Ohms with components connected then the reads are skewed. You should get the same reads disconnected whether the stator is on the motor or on the bench.

I gave up alcohol long ago, it makes me do stupid things. And I don't do bubbles. Now days it's milk, water or sweet iced tea.