Spinfisher1
New member
Hello all, I have a 50 hp 2002 yamaha outboard. It has about 400 hours on it. I want to do a shock treatment with ring free and my question is this. I have a 19 gal fuel cell and I know the treatment calls for 1 oz ring free per gal of gas......how many gallons of gas do I need to treat and run through at 1 time for the shock treatment to be effective? Would 12 oz ring free and 12 gallons gas be sufficient? Any help would be great. Thanks