A lubricant filter mounting structure for a internal combustion engine includes a lubricant filter mounting surface and a catch member. The lubricant filter mounting surface is positioned at an angle with respect to a vertical plane, and the catch member is mounted at least partially directly below a lubricant filter. At least a portion of the induction system and at least a portion of the exhaust system is removeably mounted to the engine to enhance access to the filter, especially within the confined engine compartment of a personal watercraft.