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iii

GENERATOR VOLTAGE IS DEADLY

Generator electrical output connections must
be made by a trained and experienced electri-
cian in accordance with applicable codes.

When the boat has provisions for connection to
shore power, the genset must be connected to
the boat electrical system through an approved
transfer switch to prevent backfeed. Backfeed
can lead to electric shock resulting in severe
personal injury or death.

Use caution when working on live electrical
equipment. Remove jewelry, make sure cloth-
ing and shoes are dry, stand on a dry wooden
platform or rubber insulating mat and use tools
with insulated handles.

ENGINE EXHAUST IS DEADLY

Never sleep in a boat while the genset is run-
ning unless the cabin is equipped with a proper-
ly working carbon monoxide detector-alarm.

Inspect for exhaust leaks at every startup and
after every eight hours of operation.

The exhaust system must be installed in accor-
dance with the genset Installation Manual.

When modifying or repairing the boat, care
must be taken to maintain sealing of the living
quarters from spaces where exhaust gas can
accumulate.

The ventilation exhaust blowers must be kept
in good working order to prevent the accumula-
tions of engine exhaust.

For more information about the hazards of car-
bon monoxide see American Boat and Yacht
Council (ABYC) publication TH-22—

Educa-

tional Information About Carbon Monoxide.

GASOLINE IS FLAMMABLE AND

EXPLOSIVE

Do not smoke where fuel vapors are present or
in areas sharing ventilation with fuel tanks, en-

gines and other such equipment. Keep flames,
sparks, pilot lights, electrical switches, arc-pro-
ducing equipment and all other sources of igni-
tion well away.

All electrical devices, such as switches, circuit
breakers, meters and control panels used in
areas where gasoline vapors can accumulate
must be 

Ignition Protected.

No substitutes are permitted for the parts listed
in the 

Critical Parts Index

 of the genset Parts

Catalog. They must be purchased from Onan
and be installed in accordance with the genset
Service Manual by those who are trained and
experienced in marine gasoline genset service.

Fuel lines must be secure, free of leaks and
separated or shielded from electrical wiring.

When modifying or repairing the boat, care
must be taken to maintain sealing of the living
quarters from spaces where gasoline vapors
can accumulate.

The ventilation exhaust blowers must be kept
in good working order to prevent the accumula-
tions of gasoline vapors.

BATTERY GAS IS EXPLOSIVE

Do not smoke near batteries.

Wear safety glasses while servicing batteries.

To reduce arcing when disconnecting or recon-
necting battery cables, always disconnect the
negative (

) battery cable first and reconnect it

last.

MOVING PARTS CAN CAUSE SEVERE

PERSONAL INJURY OR DEATH

Do not wear jewelry or loose clothing near mov-
ing parts such as PTO shafts, fans, belts and
pulleys.

Keep hands away from moving parts.

Keep guards in place over fans, belts, pulleys,
and other moving parts.

POST THESE SUGGESTIONS IN POTENTIAL HAZARD AREAS OF THE BOAT

Redistribution or publication of this document, 

by any means, is strictly prohibited.

Summary of Contents for MGKBC Series

Page 1: ...Caution This document contains mixed page sizes 8 5 x 11 or 11 x 17 which may affect printing Please adjust your printer settings according to the size of each page you wish to print...

Page 2: ...Installation Manual MGKBC MGKBD Printed in U S A 02 04 981 0635B Redistribution or publication of this document by any means is strictly prohibited...

Page 3: ...aust from this product contains chemicals known to the State of California to cause cancer birth defects or other reproductive harm Redistribution or publication of this document by any means is stric...

Page 4: ...tion Protection 4 FUEL SUPPLY 5 ENGINE COOLING 6 Cooling System Overview 6 System Components 7 Raw Water Pickup Test 8 ENGINE EXHAUST 9 System Components 9 Exhaust Water Separator Backflow Test 10 ELE...

Page 5: ...genset drip pan and compartment clean Oily rags can catch fire Gear stowed in the compartment can cause the genset to over heat Make sure all fasteners are secure and proper ly torqued Do not work on...

Page 6: ...e present or in areas sharing ventilation with fuel tanks en gines and other such equipment Keep flames sparks pilot lights electrical switches arc pro ducing equipment and all other sources of igni t...

Page 7: ...plied greatly by the station wagon effect obstructions that block exhaust dissipation and infiltration from neighbor ing boats To protect against all three situations Onan recommends that reliable CO...

Page 8: ...13 liter min 3 0 gpm 16 liter min 3 5 gpm 13 liter min Raw Water Flow 60 Hz 50 Hz 5 0 gpm 19 liter min 4 0 gpm 15 liter min 5 0 gpm 19 liter min Maximum Raw Water Pump Lift 4 feet 1 2 m with 5 8 inch...

Page 9: ...vi This page is intended to be blank Redistribution or publication of this document by any means is strictly prohibited...

Page 10: ...G regulations is mandatory for boats in U S waters The American Boat and Yacht Council ABYC and the National Fire Protection Associa tion NFPA are typical of agencies that publish safety standards for...

Page 11: ...ex changer and replace the fuel pump At least 1 inch 25 mm of clearance is required in front of the outlet air grille on the right side There must be access for Starting and stopping the genset Resett...

Page 12: ...ct that WARNING Gasoline vapors can explode Be fore starting the genset operate the exhaust blower for 4 minutes and check the genset compartment and bilge for gasoline vapors Ventilation Ducts Ventil...

Page 13: ...heads for wiring conduit pipe and hose must be sealed to prevent exhaust gases and gasoline vapors from entering the rest of the boat Wiring conduit must be sealed inside as well as outside Plumbing F...

Page 14: ...in the fuel tank for the genset The inside diameter should be 1 4 inch 6 35 mm It must not be greater than 3 8 inch 9 mm In a common fuel supply tank the genset pickup tube should be shorter than tho...

Page 15: ...es The raw water is expelled from the boat along with the exhaust gases The V belt drives the coolant and the raw water pumps RAW WATER IN EXHAUST RAW WATER OUT THERMOSTAT HOUSING BLOCK DRAIN CAP RAW...

Page 16: ...engine A rear facing scoop can develop enough suction to impede flow Siphon Break Conduct the RAW WATER PICKUP TEST to deter mine whether a siphon break is required to prevent the engine from being f...

Page 17: ...rk the level on the genset enclosure 3 Operate the boat through its speed range for ward and reverse While the boat is operating have someone monitor the water level in the hose and mark the highest l...

Page 18: ...d stainless steel el bows are available from Onan Horizontal runs of hose must slope down at least 1 2 inch per foot 42 mm meter and be supported such that there are no sags The entire run of hose mus...

Page 19: ...linders become flooded The sea trials must verify that there is no backflow through either the exhaust hull fitting or the wa ter separator drain hose fitting Other Engine Exhaust Systems Do not T int...

Page 20: ...be able to look for water discharge from the hull to tell whether engine exhaust cooling water is flowing However the genset will shutdown if water stops flowing Code No 7 See Troubleshooting in the...

Page 21: ...MIN MUST BE ABOVE WATERLINE SIPHON BREAK NOT REQUIRED WHEN WATER EXHAUST MIXER IS AT LEAST 6 INCHES 152 MM ABOVE LOAD WATER LINE 12 INCH 305 MM MIN Note All exhaust hose and pipe must slope without s...

Page 22: ...HAN 6 INCHES 152 MM ABOVE LOAD WATER LINE Notes 1 All exhaust hose and pipe must slope without sagging at least 1 2 inch per foot 42 mm meter 2 The operator will not be able to look for water discharg...

Page 23: ...H 305 MM MIN 12 INCH 305 MM MIN MUST BE ABOVE WATERLINE SIPHON BREAK REQUIRED WHEN WATER EXHAUST MIXER IS BELOW OR LESS THAN 6 INCHES 152 MM ABOVE LOAD WATER LINE Note All exhaust hose and pipe must s...

Page 24: ...ge fre quency or to readjust voltage Grounding The genset power supply wiring and all connected electrical equipment must be bonded to the com mon grounding system of the boat in accordance with appli...

Page 25: ...tal Displays must have eight 8 conductors Harnesses for remote switches and meters only must have at least six 6 conductors connector pins 7 and 8 are not used See Figure 6 Note 1 All feed through hol...

Page 26: ...se vere personal injury The battery compartment must be ventilated and isolated from spark pro ducing equipment Battery Cables Size battery cables according to Table 2 Total cable length is the sum of...

Page 27: ...ctory Jumpers The genset leaves the factory with SWB jumpered to the other two connectors ESTOP and CO Leave the jumpers connected when no external shutdown devices are to be connected otherwise the g...

Page 28: ...e genset controller into voltage adjust mode The amber status light will begin blinking about once every sec ond to indicate the change to voltage adjust mode The green status light will remain on 3 T...

Page 29: ...ion and filling The entire exhaust system is accessible for in spection and replacement Fuel tanks piping hoses and filters comply with regulations and are accessible for inspec tion and replacement T...

Page 30: ...21 630 2528 FIGURE 8 WIRING DIAGRAM...

Page 31: ...22 630 252 FIGURE 9 GENERATOR CONNECTION DIAGRAM...

Page 32: ...23 500 3363 FIGURE 10 OUTLINE DRAWING...

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