Raider Outboards 55 User manual

RAIDER 55
Operator’s Manual
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RAIDER Outboards
DUAL ENGINE SYSTEM
The Raider series of outboard engines are dedicated to the Marine Raiders established by the
United States Marine Corps during WWII and are said by many to be the first United States special
operations force. Handpicked from the elite, these men were given specialized training and the
best equipment. They distinguished themselves during the conduct of clandestine amphibious
landings, utilizing small inflatable boats, operating behind enemy lines in direct support of
combat operations in the Central Pacific and Solomon Islands. Even though the Raiders were
disbanded at the close of WWII the need for specially trained warfighters and the requirements
for specialized equipment did not. Today’s Special Operations Forces (SOF) under the United
States Special Operation Command (USSOCOM) are expected to conduct similar and far more
demanding missions, to that end and with those warfighters in mind the Raider (OBM) is
specifically developed for SOF that routinely operate within the often unforgiving, highly
demanding, dynamic maritime environment.
WHO WE ARE
•Raider Outboards, Inc. is a-US owned and operated company based in Central Florida near
Kennedy Space Center, located in the Space Port Commerce Park. We design and produce
multi-fuel, submersible, lightweight outboard engines, and associated parts. Our markets
include Department of Defense (DOD), Other Government Agencies (OGA), National and
Local Law Enforcements and First Responder Services, Search & Rescue, and
commercial/retail.
•Raider also provides a series of transom plates that are attached to the transom of the
Inflatable Combat Raiding Craft (I-CRC) and Inflatable Combat Assault Craft (I-CAC). The
transom plates have single and dual engine configurations. The transom plates provide
centerline alignment and safety if the engine clamps loosen under vibration. Specialty
items like extended handles, extended fuel hose connections, outboard engine carts and
transportation cages are also available.

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WHAT WE ARE ABOUT
Raider Outboards develops, manufactures, and provides technical support services for highly
reliable outboard engines for today’s warfighter. Our designs are field proven and add capacity
and capability to perform the most difficult and demanding maritime missions. Features include.
•Simple and Robust.
•System Redundancy.
•Minimized Electronics.
•Air droppable.
•Bagless submersion.
•Superior dewatering.
•Leader in horsepower to weight ratio.
•25% better fuel efficiency than any other engine in its class.
•Easy to maintain and troubleshoot.
OUR MISSION
Raider Outboards will provide and deliver the most reliable premium products, hands on training,
and highest quality to the customer and serve as the premier outboard engine company to the
U.S. Military; while honoring those who protect, defend, and support our communities and our
country.
Chris Woodruff
Director of Engineering
Raider Outboards Inc.
[email protected]
321-567-2309

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YOUR RAIDER OUTBOARD ENGINE
a. The Raider R50ES-003 2805-01-697-7842 outboard engine is designed specifically for and
specially manufactured for the Department of Defense for use as the main propulsion
system on Inflatable Combat Raiding Craft (I-CRC) and Inflatable Combat Assault Craft (I-
CAC). The Raider brings additional capability far superior to any other engine in its class.
This engine can be submerged, without bagging, for extended periods and quickly
restarted.
b. We would like to emphasize that optimum engine operational performance can only be
assured on the condition that this manual is read through in its entirety and the
maintenance routines described later are followed carefully. Should difficulty arise with
the engine, please follow the troubleshooting procedures listed throughout the specified
sections within this manual. For any other issues, questions, or concerns please call 321-
383-9585 ext. 210 or contact [email protected] where our trained staff
of subject matter experts will provide you with any assistance required.
OWNER REGISTRATION AND IDENTIFICATION
a. This Raider outboard has been purchased by the Department of Defense. Each outboard
contains individual Serial Numbers and Raider Outboards has a record of every engine
delivered.
b. Serial Number: In the space provided below, please record the outboard engine's serial
number which is indicated on the starboard side of the cylinder block. The serial number
will be needed in ordering spare parts.
c. Serial Number: _______________________________________________________

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LIMITED WARRANTY
a. Raider Outboards Engines are fully guaranteed against defective materials and
workmanship for the period from the date of delivery for one year. The limited warranty
will not apply to the normal wear and tear of parts, adjustments, tune-ups, or to any
damage caused by:
1. Use or operation NOT conforming to the instructions described in this owner's
manual.
2. Damaged caused as a result of parachute failure or improper parachute rigging.
3. Damage, Deterioration, or Corrosion resulting in engine failure due to improper
conduct of Pre and Post Operations Checks. The Raider 55HP Outboard must be
flushed with fresh water and washed down after use.
4. Improper dewatering. Damage caused by failure to adhere to the dewatering
procedures.
5. Damage from accidents, collisions, contact with foreign materials, or submersion
without cleaning.
6. Growth of marine organisms on engine surfaces that exceeds recommended
submergibility times or left in the water between operational periods.
7. Any other careless use or operation issues.
8. Normal deterioration.
b. The limited warranty does not cover maintenance items. The following items are some
examples not covered by the limited warranty.
c. Spark plugs, anodes, trim-tab, propeller, fuel filter, Starter rope, split-pin, bolt/nut
washer, wire cable. Rubber goods: pump impeller. Oil seal, "O"-ring, fuel line, primer bulb,
etc., vinyl tube.
d. The limited warranty will cover only your Raider Outboards 55HP and will not cover the
craft the engine is mounted on, the trailer, equipment, or accessories associated with the
product.

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THIS MANUAL
a. This owner’s manual provides information that is needed for inspection, procedures to
prepare the engine for an operational cycle, preventative maintenance and
troubleshooting of the Raider 55 Outboard Engine. Additional information about specific
systems and parts are described within the service and parts manuals. These manuals
including this one may be found on the Raider Outboards web site raideroutboards.com
and may be downloaded for convenience. Should additional information be required
please call or email customer service department at 321-383-9585 ext 210 or
[email protected].
b. For our users we have built the best outboard engine for long term, it is essential for the
maintainer to prepare the outboard prior to the operational period. To ensure this, the
maintenance and service must be done properly by a service technician with fundamental
knowledge and skills. This manual is utilized so that our operators can always use their
outboard engine with full satisfaction.
c. Raider 55HP Outboard Engine Service manual: https://www.raideroutboards.com/ or
contact Raider Outboards customer service at 321-383-9585 ext 210,
[email protected]

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Contents
General Information ...................................................................................................................11
Safety Information...................................................................................................................11
Hazardous Materials Warning .................................................................................................11
Notice: Warning/Caution/Note ...............................................................................................14
Emergency Stop Switch ...........................................................................................................15
Raider Emergency Tool Kit.......................................................................................................16
RAIDER Model 55 Outboard Engine System Overview................................................................17
Capabilities/Features...............................................................................................................17
Specifications...........................................................................................................................19
Components and Controls.......................................................................................................20
Systems Details ...........................................................................................................................28
Intake and Exhaust System......................................................................................................28
Fuel System .............................................................................................................................32
Electrical System......................................................................................................................34
Drive System............................................................................................................................37
Cooling System........................................................................................................................43
Prior To Operation ......................................................................................................................47
Fuel Requirements ..................................................................................................................47
Break-In...................................................................................................................................51
Engine Mounting .....................................................................................................................52
Dual Engine..............................................................................................................................54
Dual Engine Mounting.............................................................................................................56
Dual Linkage Kit Installation ....................................................................................................58
Propeller Selection ..................................................................................................................65
Standard Operating Procedure ...................................................................................................66
Starting the RAIDER Model 55 Outboard Engine.....................................................................66
Maneuvering ...........................................................................................................................70
Trim Adjustments....................................................................................................................71
Shallow Water Running/Beaching ...........................................................................................73
Dewatering..............................................................................................................................74

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Dewatering Components .....................................................................................................74
Pre-Submersion ...................................................................................................................75
Post Submersion..................................................................................................................79
Flushing ...................................................................................................................................81
Long-term Storage (Layup)......................................................................................................84
Troubleshooting..........................................................................................................................90
Preventive Maintenance Checks and Services (PMCS)................................................................97
Before Operations Checks .......................................................................................................98
During Operations Checks .....................................................................................................104
After Operations Checks........................................................................................................106
Operator Maintenance and Repair Procedures ........................................................................109
Decompression Valve ............................................................................................................109
Spark Plugs ............................................................................................................................112
Float Chamber Gasket ...........................................................................................................112
Primer....................................................................................................................................115
Fuel Filter Element W/O-Ring................................................................................................117
Starter Lock ...........................................................................................................................119
Starter Rope ..........................................................................................................................125
Oil Fill/Drain Gasket...............................................................................................................131
Anode, Trim Tab ....................................................................................................................132
Propeller Assy (11PCV) ..........................................................................................................134
Anode, Stern Bracket.............................................................................................................138
Stop Switch Lanyard Assy ......................................................................................................139
Fuel Line Replacement Kit .....................................................................................................142
Stern Bracket Clamp Screw Kit ..............................................................................................144
Thermostat and Thermostat Cap Gasket...............................................................................145
Tachometer ...........................................................................................................................147
APPENDICES..............................................................................................................................150
Before Operations Checklist..................................................................................................150
During Operations Checks .....................................................................................................153
After Operations Checklist.....................................................................................................155

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Recommended Parts List Per Engine .....................................................................................157
Consumable Material Requirements.....................................................................................158

RAIDER 55
Operator’s Manual
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General Information
SAFETY INFORMATION
As the operator or coxswain of your craft, first and foremost, you are personally responsible for
the safety of the crew, embarked personnel, and any person in the water or in the vicinity of
the craft. Safety is paramount in all operations. Therefore, you should possess thorough
knowledge of correct operation of your craft, its accessories, and the RAIDER Model 55
Outboard Engine. This manual details the proper procedures, correct operation, and
maintenance of the engine. Additional hands-on training courses for both the operators and
technicians are available through Raider.
Hearing Protection
Ensure all personnel in the vicinity and operating the Outboard Engine wear hearing protection
when engine is being operated to prevent against potential noise hazards. Failure to follow this
warning may cause damage or loss of hearing.
Low Pressure (LP) Air
Compressed air used for cleaning purposes must not exceed 30 psi (207 kPa). Wear gloves and eye
protection. Do not direct compressed air at yourself or other people. Failure to comply may cause injury
to personnel.
HAZARDOUS MATERIALS WARNING
Degreasing Solvent
Cleaning Solvent is flammable and can cause irritation to the eyes, skin or respiratory tract.
Read and carefully follow manufacturer’s instructions prior to use. Only use in well-ventilated
areas and keep away from heat, open flame and/or other ignition sources. Ensure containers
are securely closed when not in use. Keep fire extinguishers nearby. Wear protective eyewear
and clothing. Do not breathe vapors. Use a respirator as needed. If exposed, immediately flush
eyes with water and/or wash skin with soap and water, seek medical attention.
Refer to local procedures and plans for preventing and responding to spills or leaks.
Immediately clean up any spills. Keep cloths / rags away from open flame and / or ignition
sources. Comply with local procedures and environmental regulations when disposing of
solvent, cleanup materials, and leaked or spilled fluid.
Failure to comply may result in injury to personnel, damage to equipment and/or damage to
the environment.

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Adhesive And Sealing Compounds
Adhesive and sealing compounds can be toxic and/or flammable. Only use in well-ventilated
areas and keep away from heat, open flame and/or other ignition sources. Ensure containers
are securely closed when not in use. Keep fire extinguishers nearby. Do not breathe vapors.
Continued exposure can cause dizziness and irritation to eyes, skin or respiratory tract. Sealing
compounds and adhesives bond on contact with eyes, skin, or clothing. Do not allow
compounds to contact skin or eyes. Wear protective eyewear and clothing. If exposed,
immediately flush eyes with water and/or wash skin with soap and water, seek medical
attention. Immediately clean up any spilled compound. Comply with local procedures and
environmental regulations when disposing of any adhesives/sealants or cleanup materials.
Failure to comply may result in injury to personnel and/or damage to the environment.
Fluid Spill
Fluid spills may be slippery and cause falls. Refer to local procedures and plans for preventing
and responding to fluid spills or leaks. Immediately clean up spilled fluid. Use a drain pan or
suitable container to capture any draining, leaking or spilled fluid. Refer to local procedures and
plans for preventing and responding to fluid spills or leaks. Immediately clean up spilled fluid.
Comply with local procedures and environmental regulations when disposing of cleanup
materials, and drained, leaked or spilled fluids. Failure to comply may result in injury to
personnel and/or damage to the environment.
Fuel
Fuel is flammable and harmful to health. Keep fuel away from heat or ignition sources. DO NOT
smoke within 50 feet (15 m) of a fuel source. Do not work on fuel system when engine is hot.
Shut down engine before refueling. Ensure fuel nozzle is grounded to filler neck. Do not overfill
fuel tank. Keep fire extinguisher nearby. Wear gloves and eye protection and ensure adequate
ventilation during refueling. Refer to local procedures and plans for preventing and responding
to fuel spills or leaks. Use a drain pan or suitable container to capture any draining, leaking or
spilled fuel. Refer to local procedures and plans for preventing and responding to fuel spills or
leaks. Immediately clean up spilled fuel. Keep cloths / rags away from open flame and / or
ignition sources. Comply with local procedures and environmental regulations when disposing
of unused fuel, soiled/cleanup materials (such as filters and rags), and drained, leaked or spilled
fuel.
Failure to comply may result in injury to personnel and/or damage to the environment.

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Lubricating Oil
Lubricating Oil may be flammable. Keep away from heat, open flame and/or other ignition
sources. Prolonged contact with lubricating oil may cause a skin rash. Wear protective eyewear,
gloves and clothing. Remove saturated clothing immediately and thoroughly wash skin that
comes in contact with lubricating oil. If exposed, flush skin and/or eyes with water and seek
medical attention.
Use a drain pan or suitable container to capture any draining, leaking or spilled fluid. Refer to
local procedures and plans for preventing and responding to fluid spills or leaks. Immediately
clean up spilled oil. Keep cloths / rags away from open flame and / or ignition sources. Comply
with local procedures and environmental regulations when disposing of lubricating oil,
soiled/cleanup materials (such as filters and rags), and drained, leaked or spilled fluids.
Failure to comply may result in injury to personnel and/or damage to the environment.
Grease
Grease contains ingredients that can cause mild skin contact hazard. Treat random or
occasional skin contact with mild soap and water. Gloves and eye protection is required with
heavy, constant exposure. Do not ingest. Immediately clean up any spilled compound. Comply
with local procedures and environmental regulations when disposing of grease or cleanup
materials.
Failure to comply may result in injury to personnel and/or damage to the environment.

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NOTICE:WARNING/CAUTION/NOTE
Before installing, operating, or otherwise handling your RAIDER Model 55 Outboard Engine, be
sure to thoroughly read and understand this operations section of this manual and carefully
follow all the instructions. Of particular importance is information preceded by the words
"WARNING," "CAUTION," and "NOTE." Always pay special attention to such information to
ensure safe operation of the outboard engine at all times.
The following safety statements are found throughout this manual and indicate information
which, if ignored, could result in fatal safety hazards or property damage.
Failure to observe could result in severe personal injury or death, or property damage.
Failure to observe could result in property damage.
This instruction provides special information to facilitate the use or maintenance of the
Outboard Engine or to clarify important points.

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EMERGENCY STOP SWITCH
Accidental activation of the Emergency Stop Switch could cause passengers to lose their
balance and even fall overboard, or it could result in loss of power in heavy seas, strong
currents, or high winds. Loss of control while mooring is another potential hazard.
The Emergency Stop Switch will stall the outboard engine when the stop switch lanyard is
pulled off. This stop switch lanyard can be attached to the operator of the outboard engine to
minimize or prevent injuries from the propeller in case the operator falls overboard. We highly
recommend use of the Emergency Stop Switch lanyard.

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RAIDER EMERGENCY TOOL KIT
Included with each RAIDER Model 55 Outboard
Engine is a Raider Emergency Field Kit (EFK).
This includes tools for underway
troubleshooting and emergency repairs and
spare parts. The tools and parts provided are
contained inside a small waterproof case
designed for easy stowage and is intended to
be carried onboard the craft as part of the
operational load out. This kit is not inclusive
and additional items may be required based on
organizational Standard Operating Procedures
(SOP).
The EFK includes the following items:
Emergency Field Kit with Case R-EFK50-002
CAGE Code
Part No.
Description
Qty
595K1
R-NGK4919
Sparkplugs
3
595K1
R-841150
M10 Deep Socket 3/8 Dr
1
595K1
R-841156
M16 Deep Socket 3/8 Dr
1
595K1
R-841153
M13 Deep Socket 3/8 Dr Modified
1
595K1
R-2292340
6 Way Screwdriver
1
595K1
R-67149
Crescent Wrench
1
595K1
R-63818
Pliers
1
595K1
R-52735A45
3/8 Hex Drill Socket
1
595K1
R-106988
3/8 Ratchet
1
595K1
R-5009238
Pelican Case 1150
1
595K1
R-203561746
#5.5 Starter Cord (7ft)
1
595K1
R-25002
2 Oz Marine Grease
1

RAIDER 55
Operator’s Manual
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RAIDER Model 55 Outboard Engine System Overview
CAPABILITIES/FEATURES
2-Stroke, Gasoline, Submersible, Air Droppable Outboard Engine
Part No. (R50-ES-003)
A propulsion system for boats, consisting of a self-contained unit that includes engine, gearbox,
and propeller, designed to be affixed to the outside of the transom. Lightweight and easily
removed for service, storage, or repairs.
•Gasoline only, with a certified NMMA TC-W3 2-Cycle Synthetic Marine Oil, Part No. (TC-
W III) at 50:1 Fuel to oil mixture.
•Fully submersible, in salt water, without bagging to depths greater than 50ft for 24
hours.
•Upon surface recovery fully operational within 10 minutes.
•Air Deployable from fixed wing and rotary aircraft
Submersible
Allows for full submersion, in salt water, without bagging to a depth greater than 50ft for 24
hours.
Dewatering
Upon recovery to the surface fully operational within 10 minutes. Easy instructions for
dewatering are provided affixed to each engine cowling of every outboard engine. Most
operators, with practice and adherence to the provided instructions, restore the engine to
operations within two minutes of surfacing. Skilled operators are able to achieve lite off in as few
as 30 seconds.
Air Deployable
When required is capable of being dropped from both fixed wing and rotary aircraft.
Lightweight
Maneuverable through the hatch of a Submarine or mounting when underway. The engine is
easily maneuvered by two personnel through the hatches of ships or submarines by using the

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installed reinforced no slip grab handles and rails. The special rail design allows the engine to be
stowed in an upright position of the deck or pallet instead of laying on its side.
Dual Linkage/Transom Plate applies to Inflatable Combat Assault Craft, I-CAC
(15 Person Craft) only
Dual Engine Transom Plate
Provides a means for repetitive, expeditious, safe, and secure dual mounting of the engine on
any marine craft transom. These plates provide a guide for the stern bracket of the engine that
will automatically center the Raider 55 to the keel (center line) of the craft. Then simply tighten
the stern bracket screws.

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SPECIFICATIONS
ITEM
RAIDER Model 55 Outboard Engine
Horsepower
55 HP
Overall length
45.1 inches (1145 mm)
Overall width
13 inches (330.2 mm)
Overall height
55.6 inches (1413 mm) (Long Shaft)
Weight
163.5 lbs. (74.2 kg)
Transom length
21.7 inches (550 mm)
Engine type
2-Stroke
Piston Displacement
42.5 in³ (697cc)
Bore and Stroke
2.68 Inches x 2.52 Inches (68 mm x 64 mm)
Number of cylinders
3
W.O.T.
5000 –5800 rpm
Exhaust System
Through Hub
Cooling System
Water cooling (Rotary rubber impeller)
Ignition System
Flywheel Magneto C.D. Ignition
Starting System
Pull Start
Intake System
Reed Valve
Lubrication System
Fuels pre-mixed with additives
Cooling System
Forced Water-cooling
Water temperature control
Thermostat (with pressure relief valve)
Gear Reduction Gear Ratio
12:23 1.92
Firing Order
1-2-3
Spark Plug
R-NGK4919 GAP “.035”
Alternator
12V 280W (Max.) (13.6V regulated)
Trim Angle
4-24 degrees
Trim Angle settings
6 degrees
Maximum tilt-up angle
75 degrees
Transom board thickness
1.22 - 2.76 inches (31-70 mm)
Maximum steering angle
80 degrees
Gear shift
Dog clutch (F-N-R) –front location
Throttle Control
Tiller Handle
Fuel Bladder/Tank
Organizational Dependent
Gasoline
50:1 mix
Engine Oil
TC-W3 2-Cycle Synthetic Marine Oil
Gear Oil
Synthetic Blend API GL5, SAE#80 to #90 16.89 fl. Oz.
(500 ml)

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COMPONENTS AND CONTROLS
1. Tilt Handle
10. Propeller
19. Reverse Lock Lever
2. Cowling
11. Skeg
20. Throttle Tension Adjust
3. Cowling Strap
12. Oil Plug (Lower)
21. Dewatering Lever
4. Cowling Latch
13. Water Strainer
22. Shift Lever
5. Tell-tale
14. Oil Plug (Upper)
23. Throttle Grip
6. Discharge Drain Tube
15. Stern Bracket Anode
24. Pull Start Handle
7. Water Plug
16. Stern Bracket Clamp
25. Stop Switch
8. Exhaust Port
17. Thrust Rod
26. Primer
9. Trim Tab
18. Clamp Screw
27. Tension Adjustment Bolt