1stoutboard
Seaman Apprentice
- Joined
- Aug 21, 2003
- Messages
- 38
New 04/ 90 hp 2 stroke Yamaha motor. I had it in for the 20 hr check up yesterday. I bought some ring free for the first time.( I am glad I have been reading this forum). According to the directions, for shock treat, use 2oz/Gal. For constant treat use 1oz /10 Gal. My question is , since I have not used it before, should I put more than 1 oz per 10 Gallons? 2 or 3 oz maybe. Or just follow directions, or Shock it to clean whatever carbon build up is in there , since I did not use Ring free for the first 20 hrs, and of course you can see the black marks around the prop exhaust. <br />Thank you .