If the O-Rings are gone, it can result in a fire starting other than at the burner. The bottom row of seals (in the picture) are ALL the O-Rings you would normally get if you bought the 29.95 MSR Service Kit from REI or so forth.
MSR Dragonfly Camping Stove O-Rings Set - Buna-N O Ring ORing Seal Kit Free Ship
O-Ring Kit for MSR Whisperlite & Whisperlite International - Double Kit
MSR WhisperLite Universal Backpacking Stove
NOB MSR WhisperLite Shaker Jet Stove Set For Camping And Backpacking
MSR WhisperLite International Compact Multi-fuel Camping and Backpacking Stove
