Our Stage 1 modification for 25ft Yamaha SVHO Jet Boats delivers a huge performance gain through easy to install modifications. Expect awesome acceleration and a top speed increase of 4~5 MPH. Engine horsepower is boosted 20% from 250hp to 299hp (per engine). Requires use of fresh premium pump fuel (91~93 octane).

ACCELERATION DATA:
STOCK STAGE 1
5 → 55 MPH
Time: 14.48 seconds 5 → 55 MPH
Time: 11.70 seconds
Factory ECU is reflashed with Maptuner Device: The Maptuner Nano Bundle delivers instant plug-in horsepower! Includes everything you need to reflash your jet boat's ECU with our proven Stage 1 tuning. Flash your ECU for more power, monitor and log critical engine data, read & clear error codes all from your smartphone! This revolutionary app based device is controlled with your phone via wireless Bluetooth connection. Intuitive & easy to use with a few simple steps!

Features and Benefits:

Wireless Bluetooth connectivity to Android or iOS smartphone.
Switch between performance tunes quickly & easily.
Restore stock tune settings if you wish.
Reflash your ECU instantly without shipping it out for programming.
Allows reading & clearing fault codes.
Includes live monitoring & data logging of critical engine data.
RIVA Replacement Performance Air Filters are installed: High-performance filters directly replace stock paper elements delivering improved air flow with improved filtration and reliability. Our filter features double the surface area of the original filter allowing more airflow for increased power.

Solas Twin Pump Impellers are installed: These impellers dramatically improves the acceleration of your SVHO powered Yamaha Jet Boat. Unique twin design incorporates a smaller 'inducer' impeller that feeds the main impeller more water with less turbulence, preventing power-robbing cavitation. This allows the main impeller to produce more thrust to get your boat on plane quicker. We have tested this impeller extensively on both stock and Stage 1 applications.

Key Features:

Improved acceleration and top speed.
Dramatically reduces cavitation.
Decreases jet pump noise in cockpit area.
Faster planing with a loaded boat or pulling towables.
Enables tighter turning radius at mid-to-high speeds.