checking stator on outboard

[roscottjr]

I tested stators on 2 engines I have. 1 is a 1964 Johnson Meteor 90 hp model V4ML-10R, this stator has 2 sets of 2 leads coming out of it. The other is a 1971 Evinrude Triumph 60hp model 60173 C, this engine has 1 set of 2 leads coming out of it.I just want to make sure I checked the stator correctly. I set my ohm meter at 1000. attached the meter ground to engine ground, attached meter hot to one lead from stator and then to the other lead. Needle did not move at all on meter. I then attached meter ground to one lead on stator and meter hot to other lead on stator and needle on meter moved all the way over. I forgot what the actual reading was. I did this on both of my outboards. If I am correct, does this mean that the stator on both engines is good?<br /><br />Thanks for any info<br />Robert

 

[Xcusme]

Re: checking stator on outboard

edit...<br />double post

 

[Xcusme]

Re: checking stator on outboard

How 'good' remains to be seen, as you don't know what the normal coil resistances should be. What you have confirmed in both cases is, that each tested stator is not shorted to ground and that each pair of leads have continuity. If these are running motors, you should be able to see A/C voltage from the stator pair. The voltage should increase with higher RPM's.

 

[R.Johnson]

Re: checking stator on outboard

The two set's of lead's on the 64, 90 are red-blue, these should read 1.7 - 3.1 ohm's on the low ohm's scale, these are the field windings. The other set are yellow-yellow, they are the stator winding's, and should read 1 ohm, or less.<br /> The 71, 60 has two yellow leads, these should read .75 + or- .2 of an ohm. You did the test correctly, just verify the low ohm's readings.

 

[roscottjr]

Re: checking stator on outboard

I will chech them again tomorrow and post the readings. R.Johnson, yes that is the color of the wires on the 64. I will post tomorrow after work with the actual readings on both engines. <br /><br />Assumeing the stators are good on both engines, is there anything else on either engine that I should check in order for the system to charge the battery? For all I know they both charge fine but Im just trying to think of anything I can in order to see what my costs will be to use these engines. So far it looks like I will be useing them both, just have o get a second boat. Both engines run great and shift gears correctly in a test tank so I see no reason for any running problems on the lake. At least not any major running problems, I hope anyway..lol<br /><br />Thanks<br />Robert

 

[roscottjr]

Re: checking stator on outboard

Oh, the ohm meter I am useing has the big gauge with a needle so I have to just about guess where the tenths of an ohm are..<br /><br />Robert

 

[R.Johnson]

Re: checking stator on outboard

Just use the lowest scale on the meter, but it sounds like your stator's are OK.

 

[roscottjr]

Re: checking stator on outboard

Thanks R.Johnson. I am going now to test the stators again and will post the actual readings shortly.<br /><br />Thanks<br />Robert

 

[roscottjr]

Re: checking stator on outboard

I rechecked my stators. I first connected the hot lead on my meter to the ground lead on my meter and set the reading on the meter to 0. I then checked my stators on both engines and the results are as follows:<br /><br />1964 Johnson 90hp Meteor<br /><br />red/blue--needle on meter goes all the way over to 0<br /><br />red/ground--needle does nothing<br /><br />blue/ground--needle does nothing<br /><br />yellow/yellow--needle on meter goes all the way over to 0<br /><br />yellow/ground--needle does nothing<br />same with other yellow<br /><br />1971 Evinrude 60 hp<br /><br />yellow/yellow--needle on meter goes all the way over to 0<br /><br />yellow/ground--needle does nothing<br />same with other yellow<br /><br />I am obviously showing continuity across each pair and the stator isnt grounded but this is the first time I have done any tests like this so I am not sure if this means they are good or bad. I will do a running test and see if they are putting out any voltage sometime this weekend.<br /><br />Robert

 

[R.Johnson]

Re: checking stator on outboard

All of your reading's are testing good. When that needle goes to zero, the meter is not sensitive enough to define one ohm, or less. Those zero reading's are showing a good stator. When you get the engine running, test across the battery with a volt meter. If the meter rise's above battery voltage with the engine running, you have a working charging system. There could be other test's on the 64, 90, but we can deal with those after the running test.

 

[roscottjr]

Re: checking stator on outboard

Sounds great. However I do have a slight problem that I am going to have to deal with. A couple of the wires in regulator box for the 1964 90hp engine are loose. They dont look like major wires that would be a problem hooking back up but I have to make sure they are correct first. We are going out of town tomorrow but I will take a closer look at the box tomorrow afternoon and hook up the wires and do a running test.The voltage regulator (which I am sure is the square looking item in the regulator box) is pretty rusty but I have seen some that looked worse and still worked and I already know that the starter solenoid is bad but I can bypass that solenoid to start the engine for the chargeing test. I will get this done as soon as I can tomorrow and post my results.<br /><br />Thanks for your help<br />Robert

 

[roscottjr]

Re: checking stator on outboard

Update on stator test, with engine running.<br /><br />1971 60 hp Evinrude Triumph<br /><br />AC voltage across yellow/yellow leads. Voltage variable with engine rpms.<br /><br />1964 90 hp Johnson Meteor<br /><br />AC voltage across yellow/yellow leads. Voltage variable with engine rpms.<br /><br />Did not get any AC voltage reading across red/blue<br /><br />On another note. The 1964 90hp doesnt have a foot on it at the moment so I couldnt run it with any water. Since the test was only going to take a few seconds I didnt see a problem. I heard a sound coming from the lower part of the power head. At least it sounded like it was coming from that area. It sounds something like a bendix on a starter. The sound kinda like a bearing makes when the bearing isnt turning as fast as the part that goes thru it.Could this be the bearing on the engine or just from not haveing no water in it. It only does it when you blip the throttle and suddenly raise the rpms. It does not do it at idle or if you gradually raise the rpms. I know it doesnt aply to the chargeing circuit but I figured with the knowledge you have on these engines it would probably be better to go ahead and add it here rather than start a new thread.<br /><br />Anyway, back to the chargeing circuit, neither engine is chargeing but I am getting AC voltage as described above. I guess that means its time to move on to testing something else..I am just going by what I learn here now. Please let me know the next step and I will get it done later today.<br /><br />Thanks<br />Robert

 

[roscottjr]

Re: checking stator on outboard

Still waiting on the next testing step.<br /><br />Robert

 

[Xcusme]

Re: checking stator on outboard

Since you metered A/C voltage that varies with motor RPM's (that's a good sign), you'll next want to check and or replace the rectifier/regulator. The rectifier should convert the A/C voltage to DC voltage. The DC voltage will recharge the battery.

 

[roscottjr]

Re: checking stator on outboard

where do I find the rectifier on each of these engines? I have already located the regulator on the 1964 90hp and have inspected it but do not know how to test these items. I am also not sure where the regulator is on the 1971 60hp.<br /><br />Robert