I changed the oil today and noticed there was a fait fuel odor in the old oil. I know that's not normal. Also, does anti-sieze compund corrode and leave a dark residue on plug threads? I replaced the plugs, and on the threads was a dark residue ( I'm hoping that it's not motor oil ). There weren't any problems on the ignition points though. No oily residue- It was quite dry and clean, save for some carbon build up. So I don't know...

 

Thanks ahead of time.

Uh...I hope this is normal, every time I've ever changed the oil in my carby it's smelled a bit like gas.

Nothing wrong with a faint smell, but it shouldn't be strong. Normally, anti-seize is a dark gray or black compound, due to the molybdenum in it. Molyb is a soft metallic element kind of like graphite. It's what makes the anti-seize compound work. It forms a barrier between the cylinder head and spark plug that keeps rust or other oxydation from forming.

How much your oil smells of petrol depends on what kind of driving you do - if you do lots of stop-start around town driving, there can be a considerable amount of petrol dissolved in the oil.

Okay. about the fuel odor, that makes sense then. I have to do a lot of start and stop. But the dark residue around the threads of the plugs--deffinately didn't look like anti-sieze comp.

Were your plugs adequately torqued? You'll get a greasy black residue if they aren't, due to oxidation of the aluminum heads vibration against them. But, I think you'd hear it if they were that loose.

Black crud on spark plug threads isn't uncommon, or a cause for alarm, IMO.