I've found on the new Briggs gas-caps I've bought, the gasket is a much harder, almost nylon-looking material - to stand up better to high-ethanol, is my hope. Worked on the last one I replaced.Started the McCulloch today. 2 pulls. 1st pull choke on, didn’t fire, smelled gas from the muffler. Turned choke off, second pull it sputtered to life. Ran it with a 1500w load for 15 minutes. Then changed the oil with 30w. Checked plug and air filter, all good.
Had about a quart of gas in it and it was sloshing out around the gas cap. Gasket is probably not sealing plus It’s a little bent, so I ordered a new one from eBay.
Always nice to see the old stuff (as well as the new stuff), well taken-care of
Rgds, D.