Could a sh775 kill a stator?

Ha. Clearly you are the end all authority.

So here we have another member saying mosfet is marketed as a 775 replacement.

Hmm.

[posplayr]

Maybe we're comparing apples and oranges here. I seem to recall online sellers offering a MOSFET unit as the official replacement for the Polaris 775. Cost saving or service failures?
At a guess the charging regime of an ATV is different.

Yes clearly whatever DohcBikes is reporting does not apply to GS's.

[Brendan W]

Maybe we're comparing apples and oranges here. I seem to recall online sellers offering a MOSFET unit as the official replacement for the Polaris 775. Cost saving or service failures?
At a guess the charging regime of an ATV is different.

[posplayr]

This is a study I did back in about 2010 comparing the stator current using a MOSFET R/R (FH012AA)and a Compufire Series R/R. There is clearlyy a big difference with the stator current being much lower using Series Mode control(Compufire or SH-775). This current difference is what smokes the stators. There is about 80% more (15 v.s. 27 amps) much current and 3.2x as much power (120 v.s. 350 watts).


SHUNT_vs_SERIES_RR_Compare_Tutorial

[Gorminrider]

maybe my stator was going out

yes, it sounds like it. I've yet to buy a 2nd hand Suzuki from the 80's without replacing the stator pretty soon after, but don't despair right away. They're easy to replace but expensive so try everything else first and be sure that's the problem.
....and of course sometimes you can limp along with a partially bad one and a disconnected headlight while you tune other things but it's risky riding anywhere in traffic without a headlight.

[posplayr]

I haven't had time to look at it today. I am thinking maybe my stator was going out. I only have the ground running in the stock wiring with another ground going to battery. The positive goes right to my solenoid which ties into my positive battery cable. I could put it back to stock if needed. Also it is on a 841100.

Crappy connections will not cause the failure with an SH-775, only lower voltages. You should follow recommenced connections however.

I haven't had time to look at it today. I am thinking maybe my stator was going out. I only have the ground running in the stock wiring with another ground going to battery. The positive goes right to my solenoid which ties into my positive battery cable. I could put it back to stock if needed. Also it is on a 841100.

[Gorminrider]

I got a used sh775 and installed it today and upon startup at idle I was getting over 13 volts. 14.1 at 4000 rpm's. I figured I had fixed the charging issue. I checked it again tonight and it was not charging. I checked the ac output on stator wires and 2 were around 50-55 volts and one had nothing. Could the rr killed my stator?

Before I installed the new rr I was getting over 80 volts on the stator. I hooked 3 yellow wires to the grey plug and red on inside black and ground on outside of the black plug. Any ideas? I don't want to get a new stator and have same result.

It's unlikely that your stator failed instantly because of the series type R/R as such. I don't have a series R/R but I can say that based on reading many posts...however your description of hookup gives me pause.... You might have done something wrong in the initial hookup.
Given it's correct, even then It's not unusual that replacing one bad component reveals flaws in the other components because the charging system is inter-dependent.

Also check connections carefully. Also, what bike is this? ie: do you have a "functioning" "headight loop"? stuff like this is stuff you will want to investigate.

[tom203]

Be skeptical. All i can do is offer facts. They fail all the time. As much or more than others.

I mean, right here we are in a thread where the reg rec has likely caused an issue. Id expect more soon.

Mosfet is the way to go.

well,offer facts... How about your brother pointing out a Polaris service bulletin.. Otherwise you're just offering an opinion that many of us find suspect based on our experiences.

Cool.

...MOSFET...

Too busy working on my bike to care. Have a good day!

[cowboyup3371]

I will also disagree with your statement that the SH775 fails more than any other. I have owned my bike going on 7 years now and put almost 20000 miles on it since I bought in. In the first 4 years I owned it using a shunt regulator I had to replace the stator at least twice. Since I replaced the R/R in 2014, I have not had a single problem with my stator and charging continues to stay where it should be.

Yes, all mechanical things fail but to say these R/Rs fail more than the shunt regulators without providing actual documented proof does not lend credibility to your statement.

To point to this guy and say - see, it's crap - doesn't take into account the fact he said he replaced his old one with a used one. We also do not know if the stator was already burned out or at the least on its last legs. I think a better recommendation would have been to replace the stator and monitor both for awhile before declaring the R/R as the cause.

Be skeptical. All i can do is offer facts. They fail all the time. As much or more than others.

I mean, right here we are in a thread where the reg rec has likely caused an issue. Id expect more soon.

Mosfet is the way to go.

[tom203]

They regularly fail, and they ruin stators. He and I just had a long discussion about it, and how the solution is mosfet

"regularly fail...."

I've been using a sh-775 for 4 years now mated with a previously used stator- no problem at all. I'm sorta skeptical about Polaris having issues with the sh-775 , unless it involved stators having a greater output than shindengen's specs.

[posplayr]

They regularly fail, and they ruin stators. He and I just had a long discussion about it, and how the solution is mosfet

shunt r/rs work fine in many bikes. oem suzuki stators and regs are exception, always have been

If your are speaking of SH775's there is plenty of evidence that the statement above is incorrect as related to GS motorcycles. Are you referring to Polaris applications?

They regularly fail, and they ruin stators. He and I just had a long discussion about it, and how the solution is mosfet

shunt r/rs work fine in many bikes. oem suzuki stators and regs are exception, always have been