Re: Johnson fuel filters advice requested… Home › Forum › Ask A Member › Johnson fuel filters advice requested… › Re: Johnson fuel filters advice requested… meluginUS Member - 1 Year (includes $3 online payment fee)Replies: 260Topics: 32 September 17, 2018 at 2:16 am #83021 I’ve usually had luck with using them again after a good fire. Burn off the gummed up fuel residue(off the motor), clean with a toothbrush and blow it out with air. These are sintered metal and not too bothered by modest heat.