That's really an exaggeration.
Screws are available at many hardware stores, take one to match the threads to be sure.
The screws most available are socket head cap screws which are a little too long.
You may have to use a washer or two to avoid causing problems. I think the main problem of too long screws are they will punch out through the top of the float bowl base.
The only other possible danger would be to strip the screw holes. The screws that are stock are special soft screws, made to avoid stripping the screw holes in the carburetor.
The replacements are probably grade 5 or higher and so will easily strip the threads of the hole.
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He didn't say he had to replace the bowl screws, he said he had to replace the drain screw, which is not a standard screw.
Which reminds me, I had bought an old Honda once. The float bowl drain screw heads were buggered up, so I went down to buy some new ones. Well.......you just cannot buy replacement drain screws. You need to buy the ENTIRE float bowl assembly! They were over $50 each about 15 years ago......and I wanted FOUR of them!! So THAT idea went down the "drain" real fast.........
