Hi I brought a westwood s600 ride on mower (TUG) is it's outher name I've just had 2 replace the carburetor on it what I what 2 do Is I'd like 2 get it running another 10-15 mph it's a 10hp I don't want 2 muck about with the engine would it help if I put a new drive belt on & a new air filter in what about if I put a hotter spark plug o yes & I'd like 2 somehow get better traction from the back drive wheel as the rear end is a bit light any ideas I'd me very grateful thank u   

From Michael damms

It's a riding mower, not a race car. You want to get it going 10 to 15 mph faster than it already does? That is unsafe and I'm not sure it could even be done.

It is what it is , like odinn7 said it's a ride on mower,
To make it go faster you would have to replace the rear end with one that has higher gears.