250 HP JET DRIVE INSTALLATION MANUAL
Page 3
90-10240040 DECEMBER 2003
Torque Specifications
NOTE: Tighten all fasteners, not listed, securely.
10 mm Fasteners
(Powerhead to Pump) 47 Nm (35 lb ft)
Reverse Stop Screw 14 Nm (120 lb in.)
Forward Stop Screw 14 Nm (120 lb in.)
Ride Plate-to-Pump Screws 8.5 Nm (75 lb in.)
Pump Cover to
Pump Housing Nuts 47 Nm (35 lb ft)
Installation Requirements
IMPORTANT: The Jet Drive is considered an INBOARD engine. The boat it is installed
in must meet industry standards (ABYC, NMMA, etc.), federal standards and Coast
Guard regulations for INBOARD engine installations.
Battery/Battery Cables
IMPORTANT: Boating industry standards (ABYC, NMMA, etc.), federal standards and
Coast Guard regulations must be adhered to when installing battery. Be sure battery
cable installation meets the pull test requirements and that positive battery terminal
is properly insulated in accordance with regulations.
IMPORTANT: Engine electrical system is negative (–) ground. It is recommended
(required in some states) that battery be installed in an enclosed case. Refer to
regulations for your area.
1. Select a battery that meets all of the following specifications:
FOR OPTIMAX ENGINES –
a. 12-volt marine type.
b. 1000 Marine Cranking Amps (MCA) or 750 Cold Cranking Amps (CCA) minimum.
c. Reserve capacity rating of at least 105 minutes.
IMPORTANT: Terminals must be soldered to cable ends to ensure good electrical
contact. Use electrical grade (resin flux) solder only. Do not use acid flux solder, as
it may cause corrosion and a subsequent failure.
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