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Author Topic: Welch plug sealant  (Read 1090 times)

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Offline jmester

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Welch plug sealant
« on: February 26, 2015, 02:43:09 pm »
Have heard many people say put them in dry. Walbro says to use nail polish. Think I read some where you can use 242 thread locker? Guess it is half one way half the other way. Looking to see what you guys use or don't use?
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Offline aclarke

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Re: Welch plug sealant
« Reply #1 on: February 26, 2015, 03:32:44 pm »
Clear nail polish.   Seems to be pretty fuel proof
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Offline jmester

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Re: Welch plug sealant
« Reply #2 on: February 26, 2015, 03:42:22 pm »
Just keep on looking for where I  read about using 242 and I found in the Stihl carb workshop manual. Trying to find something I already had in the shop. My wife doesn't paint her nails any more so no nail polish. Would almost think you don't need anything seems a tight fit.
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Offline Cut4fun .

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Re: Welch plug sealant
« Reply #3 on: February 26, 2015, 04:18:52 pm »
I'm just posting this info from a stihl dealer on my FB Chainsaw Repair group.

copy and paste usable or not.

In many cases it's the melted welch plug sealant that causes the problem. The latest carbs have stainless welch plugs that don't need sealer.

On the issue of whether to rebuild a carb. The newest carbs have ethanol resistant components that older carbs didn't. Like stainless steel jets and welch plugs. If the new carb is only 20 to 50 dollars it is a dir servive not to change it to a more serviceable component.
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Offline jmester

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Re: Welch plug sealant
« Reply #4 on: February 26, 2015, 06:26:47 pm »
That maybe true about ethanol resistant components but the metering diaphragm and pump diaphragm will still become fatigued over time. If the carb is 20 or 30 i can see buying a carb but most carbs are not that cheap.
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Offline farmboy

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Re: Welch plug sealant
« Reply #5 on: February 26, 2015, 10:01:24 pm »
I use nail polish.  Never had a problem w/it.
Shep
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Offline Al Smith

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Re: Welch plug sealant
« Reply #6 on: March 03, 2015, 04:42:49 am »
Red Loctite works too.
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