Merc 110 9.8hp carb welch plugs

[dajohnson53]

1974 SN 39xxxxx

I've dismantled and cleaned this carb before, but have never used a rebuild kit ($60 for rebuild vs the $6 gasket kit).

I decided to dismantle and clean again because of some lingering carb issues and this time bit the bullet and bought the rebuild kit.

The carb has two pressed in plugs, one silver and one brass colored - the silver one is quite a bit larger than the brass one. The kit has replacement plugs.

Neither the OEM nor the Seloc manuals I have address the plugs, although from searching these forums I think they're called welch or body channel plugs. I've read differing opinions on whether to mess with them or not.

Should I should remove them and make sure the passages underneath them are clear and clean, or is there another way?

I've searched, but have not found info on how to remove and/or replace them. Can someone give me an idiot's guide for putting new ones in?

Thanks again.

 

[Laddies]

Re: Merc 110 9.8hp carb welch plugs

Yes you have the kit use it remove the plugs and blow them out, you drill a 3/32 hole in the center of the plug and use a awl to pry the plug out. USE CARE not to drill through the carb after going through the plug. Also that the idle pickup tube out and give it a good cleaning

 

[dajohnson53]

Re: Merc 110 9.8hp carb welch plugs

Yes you have the kit use it remove the plugs and blow them out, you drill a 3/32 hole in the center of the plug and use a awl to pry the plug out. USE CARE not to drill through the carb after going through the plug. Also that the idle pickup tube out and give it a good cleaning

Thank you. Removing the plugs seems pretty straight forward - what you explained would have been my guess.

Can you tell me how to put the new ones in - remembering I've never done it. How to press them in properly, do they need to be sealed (and how), etc.

 

[Laddies]

Re: Merc 110 9.8hp carb welch plugs

Just drop the plugs into the recess convex side up and take a punch about the same dia. and tap the plug flat seal the plug with a coat of fingernail polish to seal it

 

[dajohnson53]

Re: Merc 110 9.8hp carb welch plugs

Thank you sir! Sounds easy, again kind of what I expected. I've been known to turn easy projects into adventures though.

Hmmm, I wonder if my 16 year old daughter will have any fingernail polish to loan? ;-)