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Looking for a free wiring diagram for briggs md: 407777 type :0167

The best that you will get is the B&S engine parts manuals.
Go to this link, click on riding mowers, then enter the engine numbers. You then can download the parts manual in a pdf and save it to your documents.
Find Your Small Engine Owners Manual | Briggs and Stratton Parts
Depending on the engine spec, the wiring varies depending on the type of charging system installed.
You may be able to find the service manual for B&S Intek twins on line, manual # 273521. In this manual are several wiring diagrams, I will scan the diagrams and attach them in another post in a little while.

Here are two electrical diagrams from manual # 273521. You can rotate and print them if you would like.

That is exactly what I need for my engine I found my Manuel but I can't find a diagram in them for this peticuler engine

where did you find that diagram?

Theres no diagram in any of the ten manuels it pulls up when I type the model/type in.

Mad Mackie said:

Here are two electrical diagrams from manual # 273521. You can rotate and print them if you would like.

Click to expand...

Thank you

The B&S parts manuals will show the different electrical harnesses, but no wiring diagram. These engines have two electrical circuits, ignition and 12 volt electrical. They are two separate circuits, but come together at the engine harness connector, but not connected electrically.
B&S service manuals are available for sale, but some may be downloadable on line, do a search for B&S service manual 273521.

Two things 1: My ignition switch has only 5 prongs and the one in the diagram has 6 on all the ones I found online. 2: what is the regulator/rectifier that the alternator goes to? Also on the diagram it doesn't say anything about a PTO switch I take it that that should already be hooked up and everything right? does it tie into any of the wires? The engine originally came off a riding mower not a zero turn and the rider had a spring for the deck instead of a clutch switch? I don't know if the deck clutch has anything to do with the solinoid or anything like that. Thanks for all your help, Micah :smile:







file:///C:/Users/Student/Downloads/B&S%20400000%20engine%20electrical%20from%20Manual%20273521%283%29.pdf

I also can not find a wiring diagram for the mower. I have the scematic for it but I can't read those very well.:

Results

http://ccdist.com/_serviceManuals/briggs/273521.pdf see page 5. Section 2 page 5.

Page 5??? The pages with the spark plugs and oil stuff? I read that Manuel already and I couldn't find any diagrams:confused2:

If i am reading this post correctly you are replacing an engine that had an electrical clutch with and engine that has a manual clutch. The engine with a manual clutch charging system may not be large enough to keep the electrical clutch energized. Please correct if i misread your post.

NorthBama said:

If i am reading this post correctly you are replacing an engine that had an electrical clutch with and engine that has a manual clutch. The engine with a manual clutch charging system may not be large enough to keep the electrical clutch energized. Please correct if i misread your post.

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You are correct NorthBama. I thought about that and I just thought I would put a trickle charger on after each mow. This mower is not for commercial use it is just for our yard. So it should be fine....I think if i just put it on charge.:smile:

Also the engine that came off was a 16 hp and the one I have installed is a 20.5 so it might be enough. correct me if I am wrong in that thinking:smile:

If you read the manual and understand engines, you will know that horsepower has nothing to do with the size of the charging system. Also, if you read the manual you will know that you can determine the size of each of your charging systems by the type and color of the wiring harness coming from the stator. Finally, your battery will be constantly discharging while you are mower and if the battery voltage gets too low you will either burn out the wiring in the clutch or the clutch will disengage. Trickle charging a low battery after each use will shorten the life of the battery, which means you will be replacing it more often.

So, are you saying this is not possible?

Anything is possible, just depends how much time and money you want to throw at it.

I definitely have the time and I can throw the money at it if I have to.

mechanic mark said:

Results

[ see page 5. Section 2 page 5.

Click to expand...

I actually printed this yesterday, the problem is that the coils go to the ignition prongs and the ignition switch has 6 prongs on the diagram and only 5 on mine so I don't know which wires go to which prongs. A lot of the stuff goes to the ignition and they have them numbered as to which wires go where so, since I don't have 6 prongs I can match the wires up to them. I think I have every thing wired except the wires that go to the ignition. Hope this makes sense.

You could use the charging system from the 16HP engine if it is a Briggs engine by replacing the charging stator and the voltage regulator. I have used these two with success. 10 to 16 amp charging system. Notice the yellow plug on stator matches the yellow plug on the voltage regulator and the voltage regulator must have a good ground or it will be damaged.

NorthBama said:

You could use the charging system from the 16HP engine if it is a Briggs engine by replacing the charging stator and the voltage regulator. I have used these two with success. 10 to 16 amp charging system. Notice the yellow plug on stator matches the yellow plug on the voltage regulator and the voltage regulator must have a good ground or it will be damaged.
View attachment 27480
View attachment 27482

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I don't think I have a voltage regulator on this one that I can find.

Micah Haarhoff said:

I don't think I have a voltage regulator on this one that I can find.

Click to expand...

the 3 amp stator just has a single diode( a lump in wire before connector) at the connector

right I noticed that so what exactly do i need to buy for it to work?

is the engine you removed a Briggs and Stratton if so what color is the charging coil connector

All of these have the same connector wire and clip but I think the second from the left is the one I have.


http://www.lawnmowerforum.com/attac...615-hustler-fastrac-44-a-briggs-alternato-jpg

NorthBama said:

is the engine you removed a Briggs and Stratton if so what color is the charging coil connector

Click to expand...

The engine that was on there was a honda 18hp Im putting a briggs 20.5 on there.

the pic I posted are the yellow connectors which are 10 to 16 amp charge rate all depends on the size of the magnets under the flywheel. At 10 amps with the smaller magnets will work to keep battery charged for electric pto.
Stator part # 592830
voltage regulator part# 797375

NorthBama said:

the pic I posted are the yellow connectors which are 10 to 16 amp charge rate all depends on the size of the magnets under the flywheel. At 10 amps with the smaller magnets will work to keep battery charged for electric pto.
Stator part # 592830
voltage regulator part# 797375

Click to expand...

How do I know that it will fit my motor?

partstree.com enter your engine model number

Is this the right one?

Briggs and Stratton Part 696457, ALTERNATOR | PartsTree.com

Briggs and Stratton Part 797375, REGULATOR | PartsTree.com

Thanks for all your help in this:smile:

I would go with yellow plug the part numbers I posted earlier

How do I know those will fit my engine?

look at partstree 4 a listed under alternators all will fit. First one on left side in attached picture 474B is yellow plug