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Walbro LMT 5-4993

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Walbro LMT 5-4993

Postby Andyv » Sun Nov 03, 2024 11:04 am

I'm looking for a picture/diagram for the location of the idle and high speed mixture jets. Many thanks.
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Re: Walbro LMT 5-4993

Postby KE4AVB » Sun Nov 03, 2024 1:09 pm

The model and type numbers would be helpful since the LMT 5-4993 is a generic carb body number. And it been a good while since I had one these in hand.
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Re: Walbro LMT 5-4993

Postby Arkie » Sun Nov 03, 2024 1:10 pm

Here is a repair link for that carb. (maybe)
The link is a good source for repairs several small engine carbs.
Scroll down until you see Walbro then look for LMT.
Those are really good carbs and NLA. They were replaced by the Nikki (Briggs) and the Nikki clones are iffy at best. Like Kevb4 indicated the LMT 5-4993 REPLACEMENT can also be a generic clone replacement and not really a Walbro, but is a China version.
I've had lots of on hands on experience with the real Walbro LMT's.

Just a few hints.
You can easily ruin a good rebuildable Walbro LMT if not careful. (and you will then be SOL)
I usually do not attempt removing the emulsion tube during a first cleaning, because You can easily ruin the carb if it's stuck in place and it requires a good fitting Hollow ground gunsmith type screwdriver. Also best to soak the carb in a warm solution or even a penetrating oil before trying to remove the emulsion tube.
I've repaired several of them W/O removing the emulsion tube just using low pressure air.

Also if the LOW jet adjust has the plastic limiter use a Dremel tool and grind off the plastic on one side. Do not try to pry off the plastic and smash it off or YOU WILL break the jet.
After the limiter is off you can use the Dremel and cut a slot in the end of the jet for a small screwdriver. The jet is set a about 1 1/2 turns out.
Sometimes you can find bowls, bowl gaskets, and few parts on Fleece bay.
https://outdoorpowerinfo.com/repairs/
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