GRAUPNER GTX-500 Instructions D'utilisation page 3

Operating instructions for the Graupner GTX-500 outboard motor
This outboard motor is designed for small to medium-sized racing and sports boats up to about 60 cm in length. Power
transmission from motor to propeller is via a 2.5 mm Ø V2A flexible shaft which is easy to maintain. The version Order No. 2371
is equipped as standard with a SPEED 500 7.2 V motor, Order No. 1799. This version is the ideal choice for powering motor
yachts at medium speed. The version Order No. 2371.2 is supplied without an electric motor, and can be fitted with any motor of
the 500 size. This version is a good choice for racing boats.
Important notes:
•
The outboard motor must not be run in a model until the suppressor components have been fitted to provide adequate
interference suppression. First the motor cover must be removed; lever it upwards carefully until it disengages.
•
Solder the 470 nF capacitor across the two motor terminals as a bridge. Solder the power cables to the motor taking
care to maintain correct polarity, and arrange them in such a way that they can be routed through the small
rectangular cut-out in the motor cover.
•
Attach the outboard motor to the transom of the boat's hull using two to four screws (e.g. 2.9 mm Ø self-tapping
screws, Order No. 5877.10). The slots in the motor mount allow height adjustment of about 10 mm for trimming. The
thrust angle of the outboard motor can be adjusted by loosening the M3 cheesehead screw on the motor mount.
•
The steering movement of the outboard motor is controlled by the two lateral linkage lugs, and it is important that
there should be no slop in the linkage. We recommend that you connect the steering pushrod to the outboard motor
and the servo output arm using pushrod connectors, Order No. 1173.
•
The openings in the hull for the power cables and rudder linkage must be carefully sealed with rubber grommets or
bellows to prevent water penetrating the hull.
•
At the side of the outboard motor shaft, close to the motor mount, you will find a small hole through which you can
access the flexi-shaft clamping screw using a 1.5 mm allen key. The clamping screw must always be tightened very
firmly, otherwise the flexi-shaft might slip inside the coupling. If you wish to remove the flexi-shaft, unscrew the shaft
bearing from the shaft using an 8 mm A/F spanner, and withdraw the shaft and the flexi-shaft which is glued into it.
Caution: the shaft bearing has a left-hand thread. This means that you have to turn the spanner clockwise in order
to undo and remove it.
•
Do not run the outboard motor on its full operating voltage under no-load conditions (i.e. out of water), as this would
allow the system to spin up to excessive speed which could damage the flexi-shaft.
•
Do not cover or otherwise seal the cooling holes in the housing cover, as this would cause the motor to overheat.
•
The outboard motor is designed for use with a surface-piercing propeller, i.e. only the lower propeller blade is
submerged at any one time when the boat is running.
•
The motor system is designed for forward running only. Running the motor in reverse may damage the flexi-shaft.
•
The flexi-shaft and the shaft bearing should be lubricated occasionally using non-contaminating grease (e.g. Order
No. 570). Access to these parts is possible by removing the flexi-shaft as described above.
•
Ensure that the propeller does not contact any objects or parts of your body when the motor is running.
•
The operating voltage range is 6 - 9.6 Volts (applies to Order No. 2371); do not exceed the stated voltage.
•
Take care not to overload the motor, i.e. more than 12 A continuous current, as this may wreck the motor (applies to
Order No. 2371).
•
Never run the outboard motor in salt water
•
After every run remove any water which manages to get inside the case. A few drops of water will not damage the
motor, but it should be dried out after use.
Replacement parts:
Order No. Description
2371.1 Flexi-shaft
1799 SPEED 500 7.2 V electric motor (Order No. 2371 only)
GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
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All manuals and user guides at all-guides.com
# 44321
Order No. 2371
2371.2
06/2008