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Stihl Briggs

Started by Gregs mowing, March 23, 2024, 06:07:47 PM

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Gregs mowing

Hi Mick.

Couldn't upload pics of the Briggs in struggling with so I've messaged on insta if you can reply that'll be great.

Also cleaned out carb but still hunts... proper carb too not a plastic one. Any tips appreciated as always.
Cheers.

briggslinkage1.jpg

briggslinkage2.jpg

briggslinkage3.jpg

Mick

Greg, I don't see the pics on Insta either.  So what machine / engine, and what issues are you having?
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Gregs mowing

Please check mick as I sent three pics. Engine won't turn off.

Mick

Greg, I edited your first post to add those images.

Hunting, either a gummed up carb, Really bad float level, or split inlet tube.

And as you mentioned it won't switch off.  Looks like all is ok there, unless the control plate isn't touching the switch contact.  Make sure it does touch it when in the off position.

If that's ok then you either have the stop wire disconnected from the coil, or a broken wire (Rare), or a faulty coil.

EDIT  Looking at the stop switch it looks like the wire is fitted incorrectly.  You need to push that metal piece the wire is hooked through now, and then poke the wire through the hole below it.

briggs-stop-switch.png
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Gregs mowing

Cheers mick. Will have a look.
I didn't notice the black plastic plate that goes between carb and engine wasn't on correctly. Could that affect its running? Thought car was cleaned as all jets seemed clear.
Also the second screw on the carb bowl. Should that locate on the little lug that sticks out on the "shaft"?

Mick

Quote from: Gregs mowing on March 24, 2024, 06:34:25 PMI didn't notice the black plastic plate that goes between carb and engine wasn't on correctly. Could that affect its running?

Yes if it's letting air in then it will cause issues.

Quote from: Gregs mowing on March 24, 2024, 06:34:25 PMAlso the second screw on the carb bowl. Should that locate on the little lug that sticks out on the "shaft"?

I have no idea what you are talking about there Greg, got a pic?

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Gregs mowing

Not got a pic at the moment Mick. There's a screw that's attached to the bowl from an angle. Like on some gcv Honda engines. Not sure what they do.

Mick

Greg, do you mean the bowl drain bolt?  That's all I can think of, as some have them and some don't.  It's just a drain.
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Gregs mowing

Hi mick. Will send pics on insta. Done wire as said but still not turning off. Have looked at where wire connects to coil and seemed a bit floppy. Could coil be the issue? Engine runs fine now with new backplate

Mick

The only reason it wouldn't stop is if the stop wire terminal isn't going to ground when in the stop position. 

So like I mentioned earlier, it's either a broken or loose wire, the control plate is not contacting the switch, The control plate is insulated and not earthing to the engine, which I don't think I've ever seen, or a bad coil where the stop terminal has broken connection inside the coil.

Definitely check that wire if it seems floppy, as it's a solid wire and should feel the same for its entire length.
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