1984 Johnson 70 HP needs stator?

[idonthaveaname]

Got the boat out and when started the Johnson chugged along and I coaxed it into plane. After that, it ran like a scalded dog. Stopped for a bit, same thing. Brought her home and sat in the driveway for two weeks. Took it out and does nothing but turn over. Called a mechanic, he checked. No spark at plug. He says it's probably the stator. My concern is "probably." He says it's original...the stator. So, what do you think? How much is a fair price?

Thanks in advance!!

Steve

 

[jtexas]

Re: 1984 Johnson 70 HP needs stator?

maybe it needs a stator. or, maybe it needs a powerpack. or, maybe there's a short in the kill circuit.

If your "mechanic" did nothing but check for spark, and is now ready to install a new stator, then he's just a parts-changer masquerading as a mechanic. Randomly throwing parts at it can get expensive. There are tests to determine which parts are faulty, then you only have to replace what's broke.

Find another mech who knows what he's doing.

Better yet, get yourself a factory service manual and fix it yourself.

 

[cr2k]

Re: 1984 Johnson 70 HP needs stator?

There is a whole section on trouble shooting in the manual. Coils? Doubt if both went at the same time, Switch Box (Power Pack) Could be, Trigger coils, Charge coils? Kill circuit. And WHY did it go out?

Your "mechanic's" approach is akin to "your car won't start you need a new engine."

 

[boobie]

Re: 1984 Johnson 70 HP needs stator?

You defineatly need a new "mechanic". What shade tree did he come out from under on or I should say fall out of ??

 

[idonthaveaname]

Re: 1984 Johnson 70 HP needs stator?

There's a solid reason why I like this place and it's because of people like you. When the gentleman was looking over the engine, he went through the normal check for spark/air/fuel. Since there was no spark he stated, "It looks like the stator is bad and that could get expensive." I thought to myself, that was quick and this guy is a; 1.) genius, 2.) psychic, or 3.) scammer. That ol' gut feeling hit me and I told him to hold off for now (so I could contact iboats). I have a fairly good BS detector and it was pinging pretty loud. Nonetheless, thank you for the heads up. A friend once said, "It's not knowing every answer. It's knowing where to go to get those answers."

 

[idonthaveaname]

Re: 1984 Johnson 70 HP needs stator?

So here's a question....

Should I buy the SELOC or the factory manual? Or, since it is electrical and I am not ever going to get mechanical with it, should I get the generic (it seems) ignition manual.

 

[mamm7215]

Re: 1984 Johnson 70 HP needs stator?

ALWAYS get the OEM factory manual. Period. I have a Seloc and never break it out anymore.

 

[jtexas]

Re: 1984 Johnson 70 HP needs stator?

Factory manual is specific -- all the pictures look just like my motor -- it's thorough, but it's written for professional mechanics and assumes a certain level of general mechanic knowlege.

Seloc on the other hand is written for the boat owners who are also do-it-yourselfers; it has some good general advice, preventive maintenance, couple special tool workarounds, but it covers so many models, the illustration might or might not resemble the part you're working on. In some cases it's just downright wrong. For example, it doesn't know what kind of carbs are on my motor. It does have some pretty good cutaway lower unit photography though.

I coulda got by without seloc, if I hadn't of bought it first.

 

[LongLine]

Re: 1984 Johnson 70 HP needs stator?

The part will probably cost in the $160 range. A multi-meter (ohmmeter) at harbor freight will probably cost you $5. Search for procedure on net will probably take 10 minutes. (less on Iboats) Realizing that the mechanic should have checked that GD (gosh darn) lanyard switch - priceless.

Tom B.
(LongLine)

 

[Joe Reeves]

Re: 1984 Johnson 70 HP needs stator?

The stator is a green ring looking component located under the flywheel. There is a series of small wire coils located within that sealed stator that is the beginning of the battery charging system (the alternator). Also within the stator on that model are three larger coils that supply approximately 300 AC volts to the powerpack (the ignition system). Now, visually inspect that stator to see if there are any cracks which might have a substance dripping down upon the timer base assembly and the powerhead. If you see a substance dripping from that stator.... replace it. If leaking that substance, replace the stator regardsless of what ohm readings you may obtain as per the following paragraph.

With a cheap needle type analog Volt/Ohm Meter (I don't care for the digital models), check the ohm resistance between the two Brown leads, between the two yellow leads, and between any of those wires and ground. Sorry to say I do not have the book to give you the needed readings but someojne here will jump in with them I'm sure.

Now, Quick check to see if a short exists within the instrument cable or the ignition switch. Disconnect the large RED electrical cable plug at the engine. Remove the spark plugs. Rig a spark tester whereas you can set a 7/16" gap. Crank the engine by using a jumper wire from the battery terminal of the starter solenoid to the small 3/8" nut on the solenoid that engerizes it. If you have spark with that RED plug disconnected BUT no spark with it connected (key must be in ON position), the problem is normally that the ignition switch. (Make sure that the dead mans kill switch is not engaged).

 

[boobie]

Re: 1984 Johnson 70 HP needs stator?

Get a factory OEM service manual, a multi-meter and follow the manual for trouble shooting procedures. You should also have an adjustable gap spark tester. $6-$8 in any parts house.

 

[idonthaveaname]

Re: 1984 Johnson 70 HP needs stator?

This place never ceases to amaze me! I have never seen a more helpful group. Thanks for the suggestions from all of you and the troubleshooting instructions Jim. I will check this weekend! I know my way around a multi-meter and started my career as an electronics tech...this should be a walk in the park (sort of).

 

[Joe Reeves]

Re: 1984 Johnson 70 HP needs stator?

You state " I will check this weekend! I know my way around a multi-meter and started my career as an electronics tech..."

Good to know, saves us a little typing in that area .

 

[jtexas]

Re: 1984 Johnson 70 HP needs stator?

The troubleshooting procedures in the manual require some specialized test equipment; but you can accomplish the same purpose with a multimeter, a direct voltage adapter, and the DVA voltage specs published at www.outboardignition.com

 

[idonthaveaname]

Re: 1984 Johnson 70 HP needs stator?

Sweet! Nice link! Thanks.

 

[idonthaveaname]

Re: 1984 Johnson 70 HP needs stator?

Found the problem, I think. As you can see, the yellow plastic is coming off and the wires were touching. I separated
the wiring and turned the ignition and kaboom....running! View attachment 80650

http://forums.iboats.com/attachment.php?attachmentid=80650

 

[Joe Reeves]

Re: 1984 Johnson 70 HP needs stator?

Tried your (80650) link, received the note: Invalid Attachment specified. If you followed a valid link, please notify the administrator.

 

[idonthaveaname]

Re: 1984 Johnson 70 HP needs stator?

I think it works now Joe. If not...maybe the one below.

 

[boobie]

Re: 1984 Johnson 70 HP needs stator?

Aren't you glad now that you didn't listen to your "mechanic" and came on this site? Lot's of good info here.

 

[idonthaveaname]

Re: 1984 Johnson 70 HP needs stator?

Very glad I listened to, and asked, my friends here. I think I'll go fishing tomorrow in order to celebrate. I believe it's a good excuse. ;-)