How much A.C.

[F.O.R.C.E.]

Just wondering whats normal for the stater output in A.C. , If I,m reading the meter right its giving around 16V . The D.C. is bouncing all over so I hope its just the rectifier and not the stater.
Thanks all

 

[pnwboat]

Re: How much A.C.

16 volts A.C stator output is normal. D.C voltage should be steady with no variation. Take all of your battery connections apart and clean them including the ground connection at the block if you haven't already done so. Then test DC voltage again.

 

[F.O.R.C.E.]

Re: How much A.C.

16 volts A.C stator output is normal. D.C voltage should be steady with no variation. Take all of your battery connections apart and clean them including the ground connection at the block if you haven't already done so. Then test DC voltage again.

I put the leads from the meter right to the rectifier and got those results ----Should I still take all of the battery connections apart and clean them including the ground connection at the block ???

 

[john from md]

Re: How much A.C.

Did you have your meter on the DC 20 or 50v scale an connected to the red and black wire or red and ground of the rectifier?

John

 

[pnwboat]

Re: How much A.C.

Yes you need to eliminate a bad connection as the cause for the DC voltage jumping around. Make sure the ground for the rectifier is making good contact. Sometimes they use a black wire from one of the rectifier terminals to ground, sometimes there is no wire and the metal case of the rectifier attached to the block is the ground reference. Depends on what type of rectifier you have.

Can you describe what type of rectifier you have? It's possible that you may have a rectifier/regulator.

 

[F.O.R.C.E.]

Re: How much A.C.

Did you have your meter on the DC 20 or 50v scale an connected to the red and black wire or red and ground of the rectifier?

John

Yes I believe the meter was set to 20V D.C. for a D.C. reading ,and the leads were on the right terminals -- With the digital meter I use the reading woul just have a negetive in front ( -12 )

 

[F.O.R.C.E.]

Re: How much A.C.

Yes you need to eliminate a bad connection as the cause for the DC voltage jumping around. Make sure the ground for the rectifier is making good contact. Sometimes they use a black wire from one of the rectifier terminals to ground, sometimes there is no wire and the metal case of the rectifier attached to the block is the ground reference. Depends on what type of rectifier you have.

Can you describe what type of rectifier you have? It's possible that you may have a rectifier/regulator.

Its a small square one with four post.
When I first got the boat , the voltage gauge on the dash was jumping around so I took off the rectifier to bench test. Guess I did that wrong:redface:

I have one from another motor but its a different year and style . I was told that it would be o.k. to swap them.


Thanks

 

[F.O.R.C.E.]

Re: How much A.C.

Hello
I benched tested the rectifier again with 16v a.c. and it seemed fine.

Put it on the motor with only the two a.c. leads attached and no other leads to the d.c. side . I got around 21v a.c. out but the d.c. was still wavering between 17 and 19 v , then it would drop way down for a second then return.???
Also when I raised the idle it seemed to lower the d.c. voltage??
Thanks all

 

[john from md]

Re: How much A.C.

If my memory serves me correctly, I belive the seven amp stator generates 20-22 VAC so your stator is fine. R

Rectifiers were a cheap alternative to regulators back when, it order to be able to use electric start on the larger engines. Batteries didn't last as long as they could but seasonal boat owners just figured it was because they let it sit all winter with no maintenance. (that did help their demise along with the rectifier)

Today regulators are readily available and the Universal Regulators are pretty cheap. I say put a regulator on it.

John

 

[F.O.R.C.E.]

Re: How much A.C.

Thanks John, The only regulators I can find are over 100 bucks unless I,m looking at the wrong ones, and having multiple quirks with the motor, I would like to know that the part being replaced is the culprit.
I just have a few more questions about this issue
1. Could you post a link for the regulator?
2.If timing is off would that show a voltage fluctuation?
3. Should I use a anolog meter instead of digital?

Thanks for the help

 

[john from md]

Re: How much A.C.

1. Look in the sticky at the beginning of the Force forum for info on the Universal Regulator. They work great on Force engines. You can contact any of the people on the list who have switched to regulators and get their input as well.

2. There is no correlation between engine timing and output from the alternator circuit. The connection to the engine is that of engine rpm and, with rectifiers, the voltage output varies with engine rpm. Engine rpm differences do not cause voltage to jump around however.

3. The only place you need an analog meter or a DVA adapter is when you check output voltage from the CDI module or coil. For normal voltage readings in the 0 to 50 volt scale, the digital meter is just fine.

John