Briggs and Stratton only running on one cylinder due to diodes

Рет қаралды 26,808

8 ай бұрын

Follow along with me as I diagnose and repair this mower! Turns out it's an electrical problem. #diode #craftsman #briggsandstratton #lawncare #lawnmower #tools #diy #fluke #electricalproblems #electrical

Пікірлер: 89

@DukeWright 11 күн бұрын

Chased this issue for two days, this video got me to the problem. Thank you. Well done!

@Wrenchesandrods 11 күн бұрын

Thank you! Be sure and subscribe!

@halflife82 5 ай бұрын

Great video! That’s a hard one to trace as most people would see spark and think good!

@Wrenchesandrods 5 ай бұрын

Thank you. I appreciate your kind words!

@bctruck 8 ай бұрын

Very methodical diagnosis!! Great catch man!

@Wrenchesandrods 8 ай бұрын

Thanks Brad! I appreciate that!

@henrysmith8012 2 ай бұрын

Good catch. I see these engines with cracked intake manifolds also causing dead cylinder.

@Wrenchesandrods 2 ай бұрын

Thank you! I have not seen one with a bad intake cause a miss yet! Thanks for sharing! I'll put that in the ol brain for later diagnosis'

@philliphall5198 Ай бұрын

The plastic ones can crack

@jeffglann9894 Ай бұрын

Great trouble shooting! Thanks for sharing the knowledge and experience. God Bless you and your business!

@bugayd3695 Ай бұрын

What you are measuring is Forward and Reverse resistance in Ohms, not voltage, The voltage from the meter provides bias to either forward or reverse the diode junction (depending on the polarity of the meter probes) providing the two resistance readings. That's probably more info than anyone wants to know, but I'm too anal to have let it go. Good diagnostic video otherwise!

@davidschliebe246 3 күн бұрын

Great job!!! I think I'm chasing one of these issues.

@Wrenchesandrods 3 күн бұрын

Thank you!

@naldorg9581 9 күн бұрын

First thing to check if the plug is wet is to check for sparks

@MB123X69 Ай бұрын

Thanks for the vid, this might be whats wrong with mine. Better this than a push rod. I would have never would have thought of this with a spark on both sides. Thanks for taking the time to post!!

@jasonsippola183 22 күн бұрын

Thanks for video. Time to troubleshoot.

@johndrzal6193 Ай бұрын

This was exactly the problem I had. Many, many thanks for posting this repair.

@Wrenchesandrods Ай бұрын

Your welcome

@philliphall5198 2 ай бұрын

When I see a new coil on that cylinder I AllWAYS pull the kill wire to check dio on b/s twin

@KevinCovert 4 ай бұрын

Thank you for this content!

@Wrenchesandrods 4 ай бұрын

You're welcome

@kozarichuk Ай бұрын

Didn’t have the same problem, but this really helped me. Thank you so much.

@Wrenchesandrods Ай бұрын

Thanks for the positive comment!

@leedeborde5690 6 ай бұрын

That was awesome I've seen that before but forgotten about it thanks for the info 😅

@GaryBehlmann 5 күн бұрын

Thank You!

@Twohandsranch58 2 ай бұрын

I have a 22hp BS running on one cylinder so i will go through that process and see if it works. Thanks for this video.

@Wrenchesandrods 2 ай бұрын

You're welcome!

@JQUICK21 2 ай бұрын

Was that the problem?

@Wrenchesandrods 2 ай бұрын

Yes. The new diodes fixed it right up!

@JQUICK21 2 ай бұрын

@@Wrenchesandrods those wires with diodes can be bought at auto parts stores?

@Wrenchesandrods 2 ай бұрын

@@JQUICK21 not that I know of, but you can order them on Amazon

@user-jj2fl4vs3r 8 ай бұрын

Thanks, good trouble shoot

@TGMForum 17 күн бұрын

Nice job. 👍👍

@bobbybrown8926 2 ай бұрын

nice video and test. keep it up.

@Wrenchesandrods 2 ай бұрын

Thank you! I really appreciate comments like this!

@wilki61 19 күн бұрын

Awesome👍

@bobmeiners448 Ай бұрын

Perfect

@philliphall5198 3 күн бұрын

It’s just a one way valve is all Simple as that 😮

@jasonfollick-xx2ew 8 ай бұрын

Damn that black tool box looks familiar!!! 🤣🤣🤣🤣🤣🤣

@Wrenchesandrods 8 ай бұрын

Hell yeah it does! I'd rather him be using it still though!

@timmythepilot 5 ай бұрын

MY daddy would have whipped my butt if I didn't clean that engine off when I was done fix'n it...All that dirt on them cylinder heads can cause overheating and bad things can happen to that sweet old engine....Great diagnosis though,,!!!!👍

@Wrenchesandrods 5 ай бұрын

Everything gets a bath before it goes back home to the customer.

@timmythepilot 5 ай бұрын

I can see your dedication and common sense. World needs more mechanics like you, have any experience working on Boeing 777's. LoL

@Wrenchesandrods 5 ай бұрын

@@timmythepilot negative 🤣🤣🤣🤣

@Mike-su8si Ай бұрын

Mine tells me to get rid of some of my mowers i have but then always get more for free and buy a few more

@kennethmaas6473 3 ай бұрын

Good vedios

@markchidester6239 Ай бұрын

With the wire hooked up to the coils and the plug unplugged, should there be continuity from the terminal on the coil to ground? Great video! I learned my new thing for the day. Lets go for another.

@Wrenchesandrods Ай бұрын

With a bad diode, yes. With a good diode no

@brucer1220 3 ай бұрын

Like the video and process... haven't seen this issue yet... wondering would it be a good way to test kill wires and diodes to unplug both wires, crank it up? To shut it back off after simply crimp the fuel line to shut down?

@Wrenchesandrods 3 ай бұрын

I don't think so. When the diode goes bad, it allows current in both directions, which makes it spark out of time. It's still sparking, but it's just at the wrong time.

@Mike-su8si Ай бұрын

Mines the same engine except for the air filter cover is different mine doesn't screw on it has the yellow piece you undo mine is 40h777

@scotlippencott1739 Ай бұрын

I don't have a spare mower lying around, any idea where I might get that wire with the diodes?

@Wrenchesandrods Ай бұрын

Amazon

@philliphall5198 3 күн бұрын

Most repair shops keep them in stock 😊😊😊

@philliphall5198 3 ай бұрын

How about the size of the diode ??? Don’t want to buy the wire harness 😊 Thanks for sharing and any part information possible

@Wrenchesandrods 3 ай бұрын

amzn.to/3Pe853v Here is an Amazon link to the whole wire.

@markchidester6239 Ай бұрын

$12 for two of them makes it worth ordering just to have it on hand.

@philliphall5198 Ай бұрын

@@markchidester6239I agree and did that and in a week used one Thanks

@2004DodgeRam Ай бұрын

For me both cylinders are firing but the “driver side” one isn’t firing as much as the other side and i can’t figure out why for the life of me, i’ve tried everything i can think off and it doesn’t seem to want to work properly, both fire but one is not firing as much

@Wrenchesandrods Ай бұрын

Pull your kill wire off the weak coil and see if the spark improves. If it does, you kill wire is grounding to the block somewhere.

@Mike-su8si Ай бұрын

It could be a to tight valve

@JQUICK21 2 ай бұрын

These diode wires can be bought at Auto Zone or Harbor Freight maybe? Or where?

@Wrenchesandrods 2 ай бұрын

No but there are available on amazon

@JQUICK21 2 ай бұрын

@@Wrenchesandrods Thank you...but those that popped up on Amazon with a search don't look like these originals at all......

@Wrenchesandrods 2 ай бұрын

@JEFFQUICKLE9 the key is that they work. They might look different. That's okay. If you shoot me an email with your model type and code, I will look the parts up for you and get you a part number. Justinseabaugh3464@gmail.com

@JQUICK21 2 ай бұрын

@@Wrenchesandrods I just emailed you Justin....

@davekurtz321 Ай бұрын

AMAZON & E BAY

@user-ik4fd9ny4b 18 күн бұрын

I have a question? If a 24HP Intel only has one coil (and it's bad) how can one cylinder have spark and the other doesn't?

@Wrenchesandrods 18 күн бұрын

I've never seen a 24hp intek with only one cylinder to my knowledge

@user-ik4fd9ny4b 18 күн бұрын

@@Wrenchesandrods oh my goodness, thank you for responding so fast. No, you are correct. It has two cylinders. Does it have two coils or one? I’m having the same issue as the title of your video Another video showed one coil, two cylinders with one misfiring cylinder I can see two coils in your video at the 15 minute mark overhead view of your engine. Mine must have two coils so I could swap them from one side to another to see if it makes a difference. Once I do this I'll investigate the diodes. Already took carb apart and cleaned it. Thank you. Thumbs up!

@Wrenchesandrods 18 күн бұрын

@user-ik4fd9ny4b pull the kill wires off of your coils and see if the spark returns. If it does, you might have a bare spot on one of your kill wires that is grounding to the block, or one of the diodes is bad.

@user-ik4fd9ny4b 17 күн бұрын

@@Wrenchesandrods I did have a bare spot.. MiCE! Also, the coil was nearly touching the wheel, maybe 3 or 4 thousands. Could/would that interfere or stop sparking?

@Wrenchesandrods 17 күн бұрын

@@user-ik4fd9ny4b use a business card to gape the coil to the magnetic and you should be set!

@vanguy9780 2 ай бұрын

Where did you get that fancy compression tester?

@Wrenchesandrods 2 ай бұрын

My mom made it! It took about 9 months!

@philliphall5198 3 күн бұрын

@@Wrenchesandrodslolol 😮

@denniswetzler2024 3 ай бұрын

Could I just run the engine without the coil safety ground wire? Theoretically of course

@Wrenchesandrods 3 ай бұрын

Yes, but you won't be able to shut it off

@Mike-su8si Ай бұрын

Sure just starve it of gas and it'll shut off or choke the air breather or leave your kill wire plugged to the coil and unplug it from the harness let it dangle touch it to any metal to shut the mower off

@philliphall5198 3 күн бұрын

I know one man who ran a wire just to kill it until I told him what was wrong and I had the part 😊