Testing a Stator?

[funfisher]

Hi Guys,<br /> I believe the stator on my '90 model 90 horse Johnson (TJ90TLESB)is bad and I need a little help trouble shooting it.It has four wires coming from it, a yellow and a yellow/gray going to a terminal block, and a brown/tan and a brown/black going to the single CD-4 powerpack.<br /> on the yellow I have about 7.5 VDC and on the yellow/gray I have 11.8 VDC. On the brown/tan I get about 9 VAC (with a friend turning starter)and on the brown/black I get about 18 VAC.<br /> Does any of this sound right?

 

[oldboat1]

Re: Testing a Stator?

Readings aside, why did you think the system was bad? That is, what were the symptoms?

 

[funfisher]

Re: Testing a Stator?

My tach quit working, my battery quit charging, and the boat is very slow at WOT and sometimes wont even come on plane. at first I thought it was the regulator/rectifier but I replaced it last and it didnt help.

 

[lonewolf5347]

Re: Testing a Stator?

just trying to help,on fore @ merc the stator will also charge the battery.the stator does but out high @ low voltae.get a multimeter set to ohmsx1000 take reading ,(disconnet stator wires from powerpack when checking ohms.should have about 650 or more on each side. have you check spark on all cylinders?

 

[funfisher]

Re: Testing a Stator?

I get 420 ohms across the two brown wires and no continuity to ground on either one

 

[lonewolf5347]

Re: Testing a Stator?

450 ohms sounds very low,do all cylinders fire?sounds like the stator is weak.but like i said i am really not shure on o.m.c. engines. if you needs parts try www.seilermarine.com mike has some great prices.on mer @ force engine the yellow wires are the chargeing wires ,not shure on omc.

 

[clanton]

Re: Testing a Stator?

The 2 brown wires should have about 200 volts with a peak reading meter, at cranking rpms sparkplugs in. The 2 yellow wires should have about 18 volts with peak reading meter. Not real sure about numbers, cant get to manual. Check between the 2 wires. If you are checking with one tester lead to wire, one lead to ground, your results show the stator is shorted to ground.

 

[funfisher]

Re: Testing a Stator?

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