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Michael Mayben · 08-18-2008, 01:27 PM

TWO metering body-to-main body gaskets??? THAT's bogus! That means someone in the past drove a screwdriver between the two parts to "separate" 'em and cut through the sealing projection in the zinc casting! NO leak is to be tolerated, in addition to being a hazard, that will be both a "metering" fuel leak AND a vacuum leak depending upon where it's boogered. Ya CANNOT seal this stuff with any type adhesive, it will simply not work. The "blue" gaskets are a composite paper material treated with a neoprene surface treatment to enhance sealing yet not "stick" like the older brown or black gaskets. I have more than a few carb bodies and metering blocks ruined in that same fashion!

Do what ya have to to make that area seal with only a single gasket, two gaskets totally upsets the relationship between the components.

Just because the accel pump circuit "squirts, evenly, doesn't mean the metering block is sealing and is free-flowing for both venturis. The accel pump "shooter" for both venturis draws from the single accel pump/check valve/reservoir. That is a test of ONLY the accel pump circuit.

Even a cheepo vacuum gauge is fine for doing this. It tells ya MUCH about what is going on!

Spray carb cleaner on the accel pump cam to clean it, rub the stuff in real well. The cam is nylon, the carb spray won't hurt it at all. The paint will rub right off.

#53 jets are GOOD, don't scruu with those other than to make CERTAIN they are tight.

08-18-2008, 01:27 PM	#13 (permalink)
Michael Mayben Tech Moderator Join Date: Jan 2007 Member Number: 10 Location: Leaburg, Orygone Age: 61 Posts: 1,352	Re: Rebuilding 2300 List 2977 Carb TWO metering body-to-main body gaskets??? THAT's bogus! That means someone in the past drove a screwdriver between the two parts to "separate" 'em and cut through the sealing projection in the zinc casting! NO leak is to be tolerated, in addition to being a hazard, that will be both a "metering" fuel leak AND a vacuum leak depending upon where it's boogered. Ya CANNOT seal this stuff with any type adhesive, it will simply not work. The "blue" gaskets are a composite paper material treated with a neoprene surface treatment to enhance sealing yet not "stick" like the older brown or black gaskets. I have more than a few carb bodies and metering blocks ruined in that same fashion! Do what ya have to to make that area seal with only a single gasket, two gaskets totally upsets the relationship between the components. Just because the accel pump circuit "squirts, evenly, doesn't mean the metering block is sealing and is free-flowing for both venturis. The accel pump "shooter" for both venturis draws from the single accel pump/check valve/reservoir. That is a test of ONLY the accel pump circuit. Even a cheepo vacuum gauge is fine for doing this. It tells ya MUCH about what is going on! Spray carb cleaner on the accel pump cam to clean it, rub the stuff in real well. The cam is nylon, the carb spray won't hurt it at all. The paint will rub right off. #53 jets are GOOD, don't scruu with those other than to make CERTAIN they are tight. __________________ EcoScout "Treehugger Mark I"