placement: Measuring from the
inside of the transom to the center of the carburetor on a Zenoah, RCMK S254 or
SIKK CY27, mount the engine at 26 ¾’’ and as low in the hull as possible.
Recommended mounts are the Hyper-Torque STD style. I recommend an Aluminum 2”
Band Pipe with 105* Header.
Tank/IV Bag placement: Mount the Fuel
Tank or IV Bag in front of the motor as far forward as possible.
placement: I recommend using the
Speedmaster VM-4 Strut – Hydro/Flat. Mount the strut directly in the middle of
the transom. Mount as low as possible.
Placement: I recommend using the
Speedmaster 4” XTD 60 Dual Rudder Assy.
Draw a vertical line on the transom at the middle of the hull. Measure 2
½” to the right and draw a second line. This becomes the rudder centerline.
Mount as low as possible.
Fin: I recommend using the Speedmaster
Sport Hydro Turn Fin. Mount the bracket at 90 degrees to the sponson bottom, ¼”
to ½” up. Make sure fin outside edge does not go past the sponson
Mount Radio box 1-2” behind bulkhead.
Standard size servos work fine. I use Hitec
HS-645MG for steering and HS-311 for throttle.
it all trimmed up now….
boat as with any Sport Hydro. With the hull balanced at the rear of the
sponsons, measured weight at the strut should be less than 1lb. Adjust strut and
Turn Fin as necessary. Don’t forget to open up scoop at top of cowl so the motor
can breathe. Additional openings can be made to increase airflow as