Yamaha 115-225 HP Outboards Service Manual, Page 100Get this manual
_ G620000
PISTON Cleaning 1) Using gasket-scraper, remove the carbon from the piston top2) Using broken ring, clean the ring grooves
_ G620000
PISTON Cleaning 1) Using gasket-scraper, remove the carbon from the piston top2) Using broken ring, clean the ring grooves