What are you trying to upgrade? Are you trying to get 9.9 HP out of your 8 HP or a new replacement motor? Also, what is the boat that it is being used on and what is the maximum HP rating for the boat? Finally the most important questions..... Why? What are you trying to achieve with the upgrade? Will it be worth the time and money?
Answers & Comments
What are you trying to upgrade? Are you trying to get 9.9 HP out of your 8 HP or a new replacement motor?
Also, what is the boat that it is being used on and what is the maximum HP rating for the boat? Finally the most important questions..... Why? What are you trying to achieve with the upgrade? Will it be worth the time and money?
Best not to do it as you will get maybe 2 mph. Also, I believe it is ******* to modify 1996 and later motors.