85HP, '75 Johnson stator vs power pack?

bharle

Cadet
Joined
Aug 29, 2006
Messages
11
Still struggling with this motor... Spark is the problem. Finally got tired and ordered (4) new ignition coils and a power pack (Yes $200). Installed, seemed to idle good in the driveway for the few seconds I ran it. Put into the good ole' Mississip and right away wouldn't get up to full speed. Two cylinders on one side don't have spark.

By just cranking the motor (not starting) the wires coming from the stator have the same voltage.

1. What is the best/right way to test the stator?

There is no spark on the one side, but the opposite side to what I had before I installed the parts.

2. What are the chances I got a bad power pack?

My friend the true mechanic tells me he is 99% sure the power pak was/is bad. I haven't talked to iboats yet, but I'm hoping they will replace the one I got. My fear is the 1% chance (and the fact that Murphy seems to be in charge of me most days) will result in the problem being the stator and it will be another $100 lesson.

Obviously my concern is if the stator is bad they cost $300 at which time I will have put $450 into this motor (with water pump rebuild) and I'm guessing it is barely worth that much.

3. In the parts finder section, it lists two stators for this model year (6 Amp and 12 Amp). How does one know which I have? I can only think of tearing the engine apart and getting the OEM number off it (assuming the one installed is not already an aftermarket).

Once again I would be very appreciative of help since our short Wisconsin summer is slipping away and we still don't have the pontoon on the water....

thanks
bruce
 

tschamp20

Petty Officer 1st Class
Joined
May 10, 2006
Messages
317
Re: 85HP, '75 Johnson stator vs power pack?

do the tests tashasdaddy linked you to.it could also be the trigger(timerbase).
 

ezeke

Supreme Mariner
Joined
Sep 19, 2003
Messages
12,532
Re: 85HP, '75 Johnson stator vs power pack?

There is a grounding strap 376349 connecting the coil rack bracket 317616 to the starboard cylinder head. Make sure to disconnect and clean the contacts.

Also, you may want to clean all of the ignition connections, especially the grounds and the terminal block connections.​
 

bharle

Cadet
Joined
Aug 29, 2006
Messages
11
Re: 85HP, '75 Johnson stator vs power pack?

My friend (much better mechanic than me), now thinks it is the Trigger or timerbase as mentioned above. He says the stator looks fine - can one tell by just looking?

How is it that I can only find one Timerbase in the Johnson motor parts section for $300. Are they only available used or am I just not searching well?

Is there a way to test the stator and this trigger while off the motor? It is now all dismantled....

thanks once again for helping this boating rookie.

bruce
 
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