what would burn out a stator on a 87 150 marn within minutes

[bluebear57]

i posted a couple weeks ago about idle probs with the 87 150 marn a got some good info on the problem, basicly the consensus was carb prob i rebuilt all of them followed all of the advice but it didnt help checking with an ohm meter i found the stator to be bad i changed it and it idled GREAT i took it to the lake and no probs i ran the boat for about ten minutes and it stopped idling again brought it home and the low speed side of the stator had gone bad i dont know what might have caused this i checked the rectifer and it tests ok except on all tests the leads have to be 180 backwards from the manual [ black and red leads from ohm meter] anybody have any ideas im about to pull my hair out!!! thanks

 

[Maxz695]

Re: what would burn out a stator on a 87 150 marn within minutes

don,t know but i have a stator fits mariner off 40 hp 1997 4 cyl 4 stroke re Mercury ---> Stator 398-832075A3 with the Flywheel. Removed from a 1997 40 hp 4 stroke 4 cylinder outboard motor in working condition. This stator will fit Mariner as well. Gauranteed not to be DOA. The stator wires have absolutely no corrosion. Minor rust on the flywheel from siting. easily cleaned up with PB Blaster.
Part number 398-832075A3, Also Replaces A4, A5, A6, A12, A17 and A21

I have tested this stator with an Ohm Meter. It pegs between yellow and yellow wires, and almost totally Pegs between the green white and the white wires midway between 1 and 0 Please ask questions and be sure this is what you need before buying thanks for reading my add. e Bay item messege me if it fits

 

[bluebear57]

Re: what would burn out a stator on a 87 150 marn within minutes

thanks but it needs to be for a v6 150 that one wont work im pretty sure thanks

 

[Maxz695]

Re: what would burn out a stator on a 87 150 marn within minutes

ok I have been holding on to this one for a year and I want to see it go to someone who apprecites it it also replaces 1 CDI but not sire which one.There are no scrpes in the stator from the flywheel after changing it? grounded out wire to a ground somewhere seems likey to burn it out in while in motion

 

[jeffersondodson561]

Re: what would burn out a stator on a 87 150 marn within minutes

Number of things could do that, improperly grounded rectifiers/reg. corroded connections going into rects., loose connections of the output (red) wire to the solenoid. I would verifiy all of these things before putting another stator on see if this helps, check all of these connections make sure they are secure and clean

 

[j_martin]

Re: what would burn out a stator on a 87 150 marn within minutes

An 87 Mariner would have a 16 amp system for starters. The above diagram is for a 40 amp system. It's hard to burn out a stator with any kind of a short because they are current limited by mechanical design, and thus usually don't grossly over heat.

If you put a 40 amp flywheel over a 16 amp stator, it'll usually fry it within minutes. A 40 amp stator won't physically fit under a 16 amp flywheel.

Another item that takes a stator out quickly is if it touches the flywheel when in motion. Stator mounting, the mount itself, or the top crank bearing all come into play. You can usually see the physical scuff marks on the stator if that has occurred.

I'm betting on wrong flywheel, or bad top bearing.

hope it helps
John

 

[bluebear57]

Re: what would burn out a stator on a 87 150 marn within minutes

thanks John the stators usually last a year or 2 i did have a little prob installing the stator i got off a 150 mercury it might have touched fly wheel while running ill take it off and see if i can see any marks tomorrow thanks

 

[Maxz695]

Re: what would burn out a stator on a 87 150 marn within minutes

re max 695 previous post There are no scrpes in the stator from the flywheel after changing it? Good 1 J on the wrong flywheel though, thats why you should buy OEM gaurunteed products from iBoasts.com KNOW WHAT YOUR GETTING

 

[j_martin]

Re: what would burn out a stator on a 87 150 marn within minutes

re max 695 previous post There are no scrpes in the stator from the flywheel after changing it? Good 1 J on the wrong flywheel though, thats why you should buy OEM gaurunteed products from iBoasts.com KNOW WHAT YOUR GETTING

Actually, the difference is pretty obvious between the flywheels. The 40 amp is considerably taller.

 

[bluebear57]

Re: what would burn out a stator on a 87 150 marn within minutes

it is the stock flywheel that came with the motor from factory hoping the stator might have been rubbing

 

[Maxz695]

Re: what would burn out a stator on a 87 150 marn within minutes

check the magnets on the flywheel make sure there all tight against the flywheel and that there all there

 

[bluebear57]

Re: what would burn out a stator on a 87 150 marn within minutes

thanks guys i took the fly wheel off this morning and the fly wheel had rubbed off the top of the stator dont know if the stator i put on was thicker but it fit pretty good thanks again

 

[Faztbullet]

Re: what would burn out a stator on a 87 150 marn within minutes

It either the wrong stator or its possible the lower end cap has come loose allowing crank and flywheel it drop and rub stator.

 

[j_martin]

Re: what would burn out a stator on a 87 150 marn within minutes

The 16 amp and the 40 amp stator look a lot different. I don't think a 40 would go on that one without doing some serious chewing on the stator mounting ring, as there is a piece of metal on it that needs to have a clearance slot in the mounting ring. The ring is dead flat for the 16 amp. 16 will bolt onto a 40 amp ring.

If ya post pictures, we can figure out what you have.

 

[bluebear57]

Re: what would burn out a stator on a 87 150 marn within minutes

i found another stator and complete electrical set off of a 87 150 marn mag same yr as mine this should probably work on my marn or is there a big diff in stators thanks

 

[j_martin]

Re: what would burn out a stator on a 87 150 marn within minutes

I guess I can't help ya.
No pictures
No answer as to why the flywheel wacked the original stator.

On a 20 year old engine, you don't know who did what. It is possible to completely change out whole electrical systems. I've done it several times on my own engine just playing around. That includes the donor engine.

 

[bluebear57]

Re: what would burn out a stator on a 87 150 marn within minutes

im sorry the stator i put on was warped, i rechecked it with my old stator by looking at it and with it in place on the ring one side was up too high i dont have a camera for pics. and the reason i was asking about the whole system was for the spare parts in case of an emergency and the price was right for 2 extra power packs, idle mod, oil injector mod etc i was only going to change out the stator im on a fixed income and i try to save where i can like you said these old motors are always having probs and extra parts sometimes come in handy thanks for your help i didnt mean to offend

 

[j_martin]

Re: what would burn out a stator on a 87 150 marn within minutes

You didn't offend me, I just ran out of ways to help you.
I've never heard of a warped stator, however the wrong stator has a different lamination pattern that requires relief in the mounting ring. It would be cockeyed if put on a 16 amp ring.

You obviously have no idea what you're looking at. Surely you can find someone with a digital camera that can take some pictures, upload them to tinypics or photobucket and put the links in your post. There are a thousand pairs of eyes on this board that could then tell you exactly what's what.

Pictures needed:
Flywheel, from the top and side
Stator(s) in question
Where the yellow wires go (rectifier or voltage regulator)
Stator mount on motor without a stator.

There are also different stator mounting screws. If you use the wrong ones you can lose the stator or jam up the trigger.

I also suspect you're disassembling the flywheel at the flex plate instead of properly pulling it at the hub with a special tool. You need direction to reassemble it properly without having the timing marks wrong and without losing the flywheel at WOT. (a real exciting experience)

hope it helps
John