Briggs 35 HP air cooled...Eng. No. 6134772186G1

[Nishka]

I have a Scag turf tiger with a 35 HP B&S air cooled engine....Eng. No. 6134772186G1. I replaced the battery; but, after running the engine, the battery is not being recharged. The current regulator is Part number 808297....it has been replaced with 848221; but, the new part doesn't look like the old part...and has different connectors that won't work with this engine. Does anybody know which replacement part is correct for this engine?

Also, the 808297 doesn't appear to be broken....the ohms testing shows about 490 on both sides...(what I mean is that 808297 has a three prong connector...the middle prong appears to be negative...with negative lead to middle and positive lead to either side, I have a reading of 490 on both). But, its not charging the battery. Briggs says that 808297 has been replaced with 848221...not the same connectors.

Any suggestions to help this electrical charging system work?

 

[bertsmobile1]

That is not the way to test the rectifier.
The 2 wires that are the same colour are the AC feed wires and are connected to either side of the stator windings
The single wire in the middle is the DC + feed back to the battery
The body is ground.
You check OHMS between the AC & DC connections .
You should get continuity one way round and no continuity the other way round because the rectifier is just a bunch ( 4 to 6 ) of diodes.
So you start by checking the AC out put from the stator plug.
You should see between 24 & 40 V AC between the two wires & 1/2 that between either one and ground.
After that check the DC voltage from the middle terminal to ground.
If it is 12.5V or better then all id fine & the problem is in your wiring

The most common problem a bad ground contact between the body of the rectifier & the mower.
After that it is a bad connection on the + wire between the rectifier & the battery ( usually the switch )

 

[Nishka]

Per AVB's request...here are photos: Sorry...the iPhone wouldn't focus on the close up that has the part number:



I tried to make sense of the parts manual numbers and what part supersedes other parts...very difficult.

 

[Nishka]

Thanks very much for clarifying this...I'll retest after I reinstall. The three prong connector from the regulator connects to another three prong connector coming from the engine. The connector coming from the engine also has a red wire that attaches to a post on the starter motor. Does that need to be checked?

That is not the way to test the rectifier.
The 2 wires that are the same colour are the AC feed wires and are connected to either side of the stator windings
The single wire in the middle is the DC + feed back to the battery
The body is ground.
You check OHMS between the AC & DC connections .
You should get continuity one way round and no continuity the other way round because the rectifier is just a bunch ( 4 to 6 ) of diodes.
So you start by checking the AC out put from the stator plug.
You should see between 24 & 40 V AC between the two wires & 1/2 that between either one and ground.
After that check the DC voltage from the middle terminal to ground.
If it is 12.5V or better then all id fine & the problem is in your wiring

The most common problem a bad ground contact between the body of the rectifier & the mower.
After that it is a bad connection on the + wire between the rectifier & the battery ( usually the switch )

 

[Nishka]

I've double checked and the part number on the regulator is 808294...promise. And, below it just a bit and to the left is this number: 2214

Per AVB's request...here are photos: Sorry...the iPhone wouldn't focus on the close up that has the part number:



I tried to make sense of the parts manual numbers and what part supersedes other parts...very difficult.

 

[ILENGINE]

I've double checked and the part number on the regulator is 808294...promise. And, below it just a bit and to the left is this number: 2214

The 808297 comes back for a regulator for a smaller or different engine than yours. . Your regulator is part number 847385. The 848221 is for the 20/50 amp charging system which has two 2 wire connectors and a single wire connector for a total of 5 wires. Your regulator has a single 3 wire connector.

 

[Nishka]

Thanks ILEngine:

I agree that the parts manual shows my part number as 847385: But, then when you call it up, the photo does not have the same connectors and will not work with my engine. The part that does match is Part No. 691573. This looks the same as the part off of my engine; but, I'm concerned that it doesn't match what the parts manual says.

 

[ILENGINE]

Thanks ILEngine:

I agree that the parts manual shows my part number as 847385: But, then when you call it up, the photo does not have the same connectors and will not work with my engine. The part that does match is Part No. 691573. This looks the same as the part off of my engine; but, I'm concerned that it doesn't match what the parts manual says.

There is a glitch some place. Your 808297 does supercede to the 691573 regulator. Looks like Briggs list two stators and two regulators that neither one was used on your specific engine.

 

[bertsmobile1]

Considering you are in Hawaii and judging from the look of the rectifier , a bad ground would be very high on the hit list.
Polish the spot where the regulator clamps onto the engine on both the rectifier & engine also polish where the bolt head sits on the rectifier to ensure you have a good ground.

Briggs change their parts numbers more often than I change my undies ( explains why I work alone )
Your engine has 2 different alternators that could have been fitted which is why there are two different rectifiers.
This gets confusing to those not used to it and if you buy parts from places like Amazon or Ebay they both would be listed as fitting 613477-2186-G1 because both were originally fitted depending upon the end use.
However , Briggs colour code the plug & wires so you always look for one that has the same plug.
Then again there is no guarantee that what is on your engine is what is supposed top be there.
Add to that all of the resellers of cheap Chinese parts on line bought from wholesales who have absolutely no idea what they are or what they fit.

 

[ILENGINE]

Bert, I looks like for some reason that this guy has the unlisted third option. He has the three wire white flat connector with barrel wires. The two regulators that they list for his engine are either a two wire flat spade black connector with a single red wire, or two 2 wire flat connector with barrel end wire connectors, plus a single red wire connector.

other than a small handful of big block Vanguard engines it looks like his regulator was used on 18 hp and smaller engines.