Tohatsu 25hp outboard upgrade?

Question

Anyone know firsthand if the gasket for a 30hp tohatsu outboard fits the 25hp tohatsu and boosts it to a 30?

http://www.internetoutboards.com/partdetail.asp?id=557

Answer 1

What gasket are you talking about? A 5hp increase won't do much for you, change the prop. If you are talking about the power head gasket, the answer is no, it is not the same.

Answer 2

No first hand experience with this.  However, it may work IF the hole in the 25 hp's  gasket is smaller than the carb throat it would restrict the fuel air mixture flow to the engine.  This gasket would then  have a larger hole to allow the full fuel air mix from carb to flow without restriction.