Re: Any idea what motor this gas cap is for? Home › Forum › Ask A Member › Any idea what motor this gas cap is for? › Re: Any idea what motor this gas cap is for? 20mercmanUS Member - 1 Year (includes $3 online payment fee)Replies: 613Topics: 23 March 18, 2018 at 4:24 am #72637 That’s too bad Scott, it should be sitting on my work bench! 😆 I have one like that and I have it on a Mercury, but I think it may be from a Champion. Steve