Westerbeke 35B THREE User manual

OPERATOR'S MANUAL
WESTER8EKE
358 THREE, 388 FOUR, 428 FOUR
MARINE DIESEL
ENGINES
Publication # 37435
Edition One
March 1988
~ WESI'ERBEKE
WESTERBEKECORPORATION
AVON INDUSTRIAL PARK, AVON. MA 02322. TEL: [phone]

SAFETY PRECAUTIONS
The following symbols appear in this manual to call attention
to and emphasize conditions potentially dangerous to the
operator,
IIWARNINGII
The above symbol is used in the manual to warn of possible
serious personal injury or loss of life.
CAUTION
The above symbol is used in the manual to caution personnel
of possible damage to equipment.
Read the manual carefully and thoroughly before attempting
to operate the equipment. Know when dangerous conditions
can exist and take necessary precautions to protect personnel
and equipment.
Fuels, exhaust gases, batteries, electrical equipment, and
moving and hot parts are potential hazards that could result
in
serious personal injury or death. Follow recommended proce-
dures carefully.
Always operate bilge blowers for at least five minutes before
starting agasoline-fueled engine; ensure nogasoline fumes
are
present before starting.
• Prevent Electric Shock
Shut off electric power before accessing electrical equip-
ment.
Use insulated mats wheneverworking on electrical equip-
ment.
Make sure your clothing is dry, not
damp (particularly
shoes), and keep your skin surfaces
dry when handling
electrical equipment.
Remove wristwatch and jewelry when working on electri-
cal equipment.
Do not connect utility shore power to vessel's AC circuits,
except through a ship-to-shore double-throw transfer
switch. Damage
to vessel's AC generator may result if this
is not done.
Be extremely careful when working on electrical com-
ponents. High voltage can cause injury or death.
• Exhaust Gases Are Toxic
Ensure1hatthe exhaustsystem is adequate to expel gases
discharged
from the engine. Check exhaust system
regularly for leaks and make sure the exhaust manifolds
are securely attached and no warping exists.
Be sure the unit and its surroundings are well-ventilated.
• Use Extreme Care When Handling Engine Filel
(A constant danger of explosion or fire exists)
Do notfill fuel tank{s) while the engine is running.
Do notsmoke or use an open flame nearthe engine or the
fuel tank.
• Do Not Alter or Modifythe Filel System
Be sure all fuel supplies have a positive shut-off valve.
Be certain fuel line fitting!> are adequately tightened and
free of leaks.
Make sure a fire extinguisher is installed nearby and
is
properly maintained. Be familiar with its proper use. Ex-
tinguishers rated ABC by the NFPA are appropriate for aU
applications encountered in this environment.
• Use Extreme Care When Servicing Batteries
Wear rubber gloves, a rubber apron, and eye protection
when servicing batteries.
Lead acid batteries
emit hydrogen, ahighly-explosive gas,
which can be ignited by electrical arcing or by a lighted
cigarette, cigar, or pipe. Do not smoke or allow an open
flame near the battery being serviced. Shut off all electri-
cal equipment
in the vicinity to prevent electrical arcing
during servicing.
• Avoid Moving Parts
Do not service the unit while the unit is running; if a situa-
tion arises in which it is absolutely necessary to make
operating adjustments, use extreme care to avoid moving
parts and hot exhaust system components.
Do not wear loose clothing or jewelry when servicing
equipment; avoid wearing loose jackets, shirts or sleeves,
rings, necklaces,
or bracelets that might be caught in
moving parts.
Make sure all attaching hardware
is properly tightened.
Keep protective shields and guards in their respective
place at all times.
Do not check fluid levels or the drive-belt's tension while
the unit is operating.
Do notwork on the equipment when mentally or physical-
ly incapacitated by fatigue.
\-

IMPORTANT
PRODUCT SOFTWARE DISCLAIMER
Product software 01 all kinds, such as brochures, drawings, technical data, operator's and workshop
manuals, parts lists and parts price lists (and other related information), instructions and specifications
provided from sources other than Westerbeke,
Is not within Westerbeke's control and, accordingly, is
provided to Westerbeke customers onlyas a courtesy and service. WESTERBEKE CANNOT BE RESPON-
SIBLE
FOR THE CONTENT OF SUE:H SOFTWARE, MAKES NO WARRANTIES OR REPRESENTATIONS
WITH RESPECT THERETO, INCLUDING THE ACCURACY, TIMELINESS
OR COMPLETENESS THEREOF,
AND WILLIN NO EVENT
BE LIABLE FOR ANY TYPE OF DAMAGES OR INJURY INCURRED IN CONNEC-
TION WITH,
OR ARISING OUT OF, THE FURNISHING OR USE OF SUCH SOFTWARE.
For example, components and subassemblies incorporated into Westerbeke's products and supplied by
others (suchas engine blocks, fuel systems and components, transmissions, electrical components, pumps
and other products) are generally supported by their manufacturers with their own software, and Wester-
beke must depend on such software forthe design
of Westerbeke's own product software. Such software,
however, may be outdated and
no longer accurate. Routine changes made by Westerbeke's suppliers, of
which Westerbeke rarely has notice in advance, are frequently not reflected in the supplier's software until
after such changes take place.
Westerbeke customers should also keep in mind the time span between printings of Westerbeke product
software, and the unavoidable existence of earlier, non-current Westerbeke software editions in the field.
Additionally, mostWesterbeke products include customer-requested special features that frequently
do not
include complete documentation.
In summation, productsoftware provided WITh Westerbeke products, whetherfrom Westerbeke or othersup-
pliers, must not and cannot be relied upon exclusively as the definitive authority on the respective product.
It not only makes good sense, but is imperative that appropriate representatives of Westerbeke orthe sup-
plier in question be consulted to determine the accuracy and currency of the product software being con-
sulted bythe customer.
1 Westerbeke Diesel Engines

FOREWORD
Thank you for selecting a Westerbeke marine product for your use. We at Westerbeke are pleased to have
you as a customer.
Read this manual carefullyand observe ali safety precautions included throughout. Operating procedures,
periodic preventive maintenance procedures, installation checks, system descriptions and minor adjust-
ment procedures are included herein so you can operate your equipment safely and properly, maintain the
equipment at a high level
of efficiency, and expect dependable performance and long service life in return.
Should your unit require special attention, contact yourWesterbeke dealer for assistance. The Westerbeke
Service Organization
is trained to provide the support necessary to ensure long-term dependable perfor-
mance.
If, within 60 days of submitting the Warranty Registration Form for your unit, you have not received a Cus-
tomer Identification Card (see below) registering your warranty, please contact the factory in writing with
Model information, including the engine's serial numberand commission date.
from: WESTERBEKE CORPORATION
AVON INDUSTRIAL PARK
AVON. MA 02322
Mail To:
Inspection of Equipment
Tit'" ,,~ ..... "", ,~'" ~5~-"" .,,,,,,,, .".<0 ••
CUSTOMER IDENTIFICATION
Adam Smith
85 Maple Street
Alden, 1M 12234
Model W 358 THREE Ser. It 1234C7G6
Expires 117/88
The engine is shipped from the factory mounted securely and properly crated. Accessory equipment is
shipped in a separate small box, usually packed within the engine's crate.
Beforeaccepting shipment
of the enginefromthetransportation company, the craie should be opened and
the contents inspected
lor concealed damage. if either visible or concealed damage is noted, you should
require that the delivery agent sign "Received
in damaged condition" on the proper delivery receipt. Also
check the contents of the shipment against the packing list and make sure that the proper notation is made
if any discrepancies exist. These noted discrepancies are your protection against loss
or damage. Claims
concerning loss or damage must be rnade to the carrier, not to the Westerbeke Corporation.
Westerbeke Diesel
Engines

TABLE OF CONTENTS
Section..........................................................................Page
W 358 THREE MARINE DIESEL ENGINE
GENERAL SPECIFICATIONS .......................................... 12
W 35B THREE SYSTEM SPECiFiCATIONS .................... 13
W 38B FOUR MARINE DIESEL ENGINE
GENERAL SPECIFICATIONS .......................................... 15
W 38B FOUR SYSTEM SPECiFiCATIONS ...................... 16
W 42B FOUR MARINE DIESEL ENGINE
GENERAL SPECIFICATIONS .......................................... 18
W 428 FOUR SYSTEM SPECiFiCATIONS ...................... 19
INSTALLATION CHECKS ................................................ 21
PREPARATION FOR STARTING ..................................... 33
DESCRIPTION OF INSTRUMENT PANELS .................... 35
STARTING PROCEDURE ................................................ 39
STOPPING PROCEDURE ................................................ 41
FUEL SYSTEM ................................................................. 43
ELECTRICAL SYSTEM ..................................................... 46
CAPTAINS PANEL DC CONTROL CIRCUIT
WIRING DIAGRAM # 36467 ................................... .48 & 49
ADMIRALS PANEL DC CONTROL CIRCUIT
WIRING DIAGRAM #36844 ..................................... 50 & 51
COOLING SySTEM .......................................................... 52
LUBRICATION SYSTEM .................................................. 60
JS TRANSMISSION ........................................................ 63
OPTIONAL TRANSMISSIONS ......................................... 66
ENGINE TROUBLESHOOTING ....................................... 79
MAINTENANCE & ADJUSTMENTS .............................· .... 82
3 Westerbeke Diesel Engines

TABLE OF CONTENTS
(CONTINUED)
LAY-UP & RECOMMISSIONING ...................................... 89
TABLE OF STANDARD HARDWARE
TIGHTENING TORQUES .................................................. 93
TORQUE SPECiFiCATIONS ............................................. 94
SPARE PARTS .................................................................. 95
INDEX ................................................................................ 96
Westerbeke Diesel Engines 4

GENERAL
Introduction
This manual contains the equipment operating procedures as well as additional information needed to help
the operator keep the equipment in proper working order. Study and follow the instructions carefully. A
planned maintenance program is included in this manual; adhering to the programwill result in better equip-
ment performance and longer equipment life. Proper diagnosis of a problem
is the most important step to
satisfactory repair; therefore, a troubleshooting table is included.
Understanding the Diesel Engine
The diesel engine closely resembles the gasoline engine, sincethe mechanism is essentiallythe same. The
cylinders are arranged above a closed crankcase; the crankshaft
is of the same general type as that of a
gasolineengine; and the diesel engine hasthe sametypeof valves, camshaft, pistons, connecting rods, and
lubricating system.
Therefore,
to a greatextent, a diesel engine requires the same preventive maintenance as a gasoline engine.
The most importantfactors are proper ventilation and proper maintenance
of the fuel, lubricating and cool-
ing systems. Replacement of fuel and lubricating filter elements at the time periods specified is a must, and
frequent checking for contamination (that
is, water, sediment, or algae) in the fuel system is also essential.
Anotherimportantfactoristhe use of the same brand ofhigh detergent diesel lubricatingoil designed specifi-
cally for diesel engines. Be careful not to put gasoline in the diesel fuel tank(s). Gasoline does not have the
same lubricating qualities as diesel fuel; consequently, gasoline in the fuel lines will damage components in
the fuel lift pump assembly, fuel injection pump and injectors.
The diesel engine does differ from the gasoline engine, however, in its handling and firing
of fuel. The car-
buretor and ignition systems are done away with and in their place are
two components -the fuel injection
pump and the fuel injectors.
Ordering Parts
When contacting yourWesterbeke dealer, parts distributor, orthe factory concerning yourWesterbeke unit,
always providetheengine's model and serial number, and transmission number as theyappear on the black
and silver "Westerbeke" plate Which is mounted on the engine's exhaust manHold. When ordering parts for
your Westerbeke engine, be sure
to insist upon Westerbeke factory packaged parts, because "will fit" or
generic parts are frequently not made to the same specHications as original equipment.
Note that component locations in the manual are referenced from the front of the engine which
is the pul-
ley/drive belt end. (The flywheel/transmission end is the rear end.) Left and right sides are determined by
the engine; imagine straddling the engine and facing in the same direction as the front of the engine: the left
side is at your left, the right side is your right.
Westerbeke engines and generator sets afe thoroughly checked and given a final run under various load
conditions before leaving the factory. Test running the engine ensures dependable operation, long service,
and a satisfied owner.
Care at the factory during assembly, and thorough testing, have resulted in a Westerbeke diesel engine
capable of manythousands of hours of dependable service. However, the manufacturer cannot control the
treatment the unit receives in the field. That part
is up to the owner/operator.
5 Westerbeke Diesel
Engines

Fresh Water
Air Bleed
Fresh Water
Circulating
Pump
Sea Water Pump
Engine Isolator
Westerbeke Diesel Engines
W 358 THREE Marine Diesel Engine
Fresh Water Fill
Unit Data Plate
Starter with Solenoid
20 Amp DC
Circuit Breaker
90· Exhaust Elbow
DC Battery
Heat Exchanger
Transmission
Shift Lever
Ground Connection

W 35B THREE Marine Diesel Engine
20 Amp DC Circuit Breaker Top Lube Oil Fill
Preheat Solenoid
Fuel. Lift Pl,!mp
Instrument
Connections
Secondary
Fuel Filter
---....;::....
Zinc Anode
Transmission
Dipstick
JS Transmission
Fresh Water
Block Drain
Lube Oil Dipstick Oil Pressure
Sender
7
Fresh Water
Air Bleed
Switch
DC Charging
Side Lube
Oil Fill
Shut-off
Lever
Throttle Lever
Lube Oil
Drain Hose
Westerbeke Diesel Engines

W 38B FOUR Marine Diesel Engine
Top Engine Oil Fill
Starter
Westerbeke Diesel Engines

W 388 FOUR Marine Diesel Engine
Top Engine Oil Fill
Air Intake
SilElnCler
Fuel Lift pump
Connections
Secondary
Fuel
Filter'----
Zinc Anode --
lube Oil Dipstick Oil Pressure
Sender
lube Oil Filter
Oil Pressure
Switch
_" ___ '_ Oil
Throttle lever
Westerbeke Diesel Engines

W 4213 FOUR Marine Diesel Engine
Top Engine Oil Fill
90° Exhaust Elbow
Lever
Starter
Westerbeke Diesel Eng ines
10

Fuel Lift pump
Fuel Filler
Zinc Anode
W 428 FOUR Marine Diesel Engine
Lube Oil
Dipstick
Top Oil Fill
Lube Oil Filler
11
Oil Pressure
Sender Oil Pressure
Switch
Oil
Throttle lever
Westerbeke Diesel Engines

W 358 THREE MARINE DIESEL ENGINE
Engine Type
Governor
Valve Mechanism
Combustion Chamber
Bore & Stroke
Piston Displacement
Firing Order
Direction of Rotation
Maximum Torque (at 2300 rpm)
Compression Ratio
Compression Pressure
Valve Seat Angle
Valve Clearance
(engine cold)
Dimensions
Inclination
Dry Weight
Fuel Consumption
Idle Speed
Cruise RPM
Westerbeke Diesel Engines
GENERAL SPECIFICATIONS
Diesel, four-cycle, three-cylinder, fresh water-cooled,
vertical, in-line (32
hp at 3600 rpm, maximum)
Mechanical, centrifugal weight type
Overhead
Swirl chamber type
3.07 x 3.07 inches (78 x 78 mm)
68.23 cubic inches (1.118 liters)
1-3-2
Clockwise, when viewed from the front
41 Ibs-ft (5.67 kgs-m)
23:1
455 psi (32 kg/cm2) at 320 rpm
Intake 45°
Exhaust 45°
Intake 0.010 inches (0.25 mm)
Exhaust 0.010 inches (0.25 mm)
Height: 21.25 inches (539.75 mm)
Width: 18.37 inches (466.60 mm) Max.
Length: 30.10 inches (764.54 mm)
Continuous 14°
Temporary 25° (not to exceed 30 min.)
3681bs (166.9 kgs)
0.42 U.S. gph (1.59 Iph) running at
2500 rpm (approximate)
800 -1000 rpm
2500 -3000 rpm
12

W 35B THREE SYSTEM SPECIFICATIONS
FUEL SYSTEM
Fuel
Injection Pump
Injection Timing
Nozzle
Injection Starting Pressure
Lift Pump (with filter element)
Fuel Filter (on engine)
Air Cleaner
Air Flow (engine combustion)
COOLING SYSTEM
General
Operating Temperature
Fresh Water Pump
Sea Water Pump
Sea Water Flow, at 3600 rpm
(measured before discharging
into exhaust elbow)
System Capacity (fresh water)
LUBRICATION SYSTEM
General
Oil Filter
Sump Capacity (includes filter)
Open flow, totally self-bleeding
No.2 diesel oil (cetane rating of 45 or higher)
Nippondenso (Bosch M type)
23" ± OS BTDC (Static)
Throttle type
2275 psi (160 kg/cm2)
12-Volt DC; lift capac~y 6 ft (1.8 m)
Canistertype, with replaceable element
Metal screen type -cleanable
71 cfm (2.0 cmm)
Fresh water-cooled block,
thermostatically-controlled
w~h sea water exchanger system
170 _190" F (77 - 88' C)
Centrifugal type, metal impeller, belt.<Jriven
Positive displacement, rubber impeller, gear.<Jriven
gpm ( Ipm) approximate
6 U.S. qts (5.68I~ers)
Forced lubrication by gear pump
Paper element, spin-on type
4.22
U.S. qts (41~ers)
13 Westerbeke Diesel
Engines

W 358 THREE SYSTEM SPECIFICATIONS
Operating Oil Pressure
Oil Grade
ELECTRICAL SYSTEM
Starting Battery
Battery Capactty
Starting Aid
Starter
Motor
DC No-Load Current
Cold Cranking Current
Alternator
Regulator
TRANSMISSION
General
(JS Transmission)
Standard Gear Ratio
Propeller Shaft,
Direction
of Rotation
Propeller Recommendations
(using JS transmission
2.47:1 reduction)
Lubricating Oil Grade
SAE Grade
Transmission Sump
Capacity
Westerbeke Diesel Engines
35 - 55 psi (2.46 -3.86 kg/cm2)
API specijication CC or CD
12-Volt, 35 A-H, (-) negative ground
(recommended)
(45 A-H cold areas)
90 -125 (Ampere-Hours)
12-Voit sheathed type
glow plug
12-Volt, 1.2KW, solenoid, actuated shift
60 Amps at 11.5 Volts (6500 rpm, min.)
190 Amps at 12 Volts
12-Volt
DC, 50 Amps
Internal regulator, built into alternator
14.4 Volts DC ± 3 Volts
Case-hardened helical gears, with an intermediate
reverse gear. Reversing carried out by a servo
double disc system.
2.47:1
Right handed -standard transmission
16 D x 12 P - 2 blade
or 16 D x lOP - 3 blade
Propeller should allow the engine
to reach
tts full rated RPM (3600 + 000 -100) at full open
throttle while underway.
API specification of CC, CD, SC, SD, or SE
SAE 20W/20 or SAE 30 exclusively
(DO NOT mix grades of oil !)
(DO NOT use multigrade oils !)
1 qt (1 liter)
14

W 38B FOUR MARINE DIESEL ENGINE
Engine Type
Governor
Valve Mechanism
Combustion Chamber
Bore & Stroke
Piston Displacement
Firing Order
Direction of Rotation
MaximumTorque (at 2400 rpm)
Compression Ratio
Compression Pressure
Valve Seat Angle
Valve Clearance
(engine cold)
Dimensions
Inclination
Dry Weight
Fuel Consumption
Idle Speed
Cruise RPM
GENERAL SPECIFICATIONS
Diesel, four-cycle, four-cylinder, fresh water-cooled,
vertical, in-line (37
hp at 3600 rpm, maximum)
Mechanical, centrifugal weight type
Overhead
Swirl chamber type
2.87 x 3.07 inches
(73 x 78 mm)
79.64 cubic inches (1.305 liters)
1-3-2-4
Clockwise, when viewed from the front
53 Ibs-ft (7.33 kgs-m)
23:1
455 psi (32 kgJcm2) at 320 rpm
Intake 45'
Exhaust 45'
Intake 0.0098 inches (0.25 mm)
Exhaust 0.0098 inches (0.25 mm)
Height: 23.70 inches (601.98 mm)
Width: 18.37 inches (466.60 mm) Max.
Length: 33.77 inches (857.76 mm)
Continuous
14'
Temporary 25' (not to exceed 30 min.)
4191bs (190 kgs)
0.42 U.S. gph (1.59 Iph) running at
2500 rpm (approximate)
750 -950 rpm
2500 -3000 rpm
15 Westerbeke Diesel
Engines

W 38B FOUR SYSTEM SPECIFICATIONS
FUEL SYSTEM
Fuel
Injection Pump
Injection Timing
Nozzle
Injection Starting Pressure
Lift Pump
Fuel Filter (on engine)
Air Cleaner
Air Flow (engine combustion)
COOLING SYSTEM
General
Operating Temperature
Fresh Water Pump
Sea Water Pump
Sea Water Flow, at 3600 rpm
(measured before discharging
into exhaust elbow)
System Capacity (fresh water)
LUBRICATION SYSTEM
General
Oil Filter
Sump Capacity (includes filter)
Westerbeke Diesel Engines
Open flow, totally self-bleeding
No.2 diesel oil (cetane rating of 45 or higher)
Nippondenso (Bosch M type)
23° ± OS BTDC (Static)
Throttle type
2275 psi (160 kg/cm2)
12-Volt DC; lift capacity 6 ft (1.8 m)
Canister type, with replaceable element
Metal screen type -cleanable
82.9 cfm (2.34 cmm)
Fresh water cooled block,
thermostatically-controlled
with sea water exchanger system
170 -190° F (77 - 88° C)
Centrifugal type, metal impeller, belt-driven
Positive displacement, rubber impeller, gear-driven
gpm ( Ipm) approximate
7 U.S. qts (6.6 liters)
Forced lubrication by gear pump
Paper element, spin-on type
4.75 U.S. qts (4.5 liters)
16

W 38B FOUR SYSTEM SPECIFICATIONS
Operating Oil Pressure
Oil Grade
ELECTRICAL SYSTEM
Starting Battery
Battery Capacity
Starting Aid
Starter Motor
DC No-Load Current
Cold Cranking Current
Alternator
Regulator
TRANSMISSION
General
(JS Transmission)
Standard Gear Ratio
Propeller Shaft,
Direction of Rotation
Propeller Recommendations
(using JS transmission
2.47:1 reduction)
Lubricating Oil Grade
SAE Grade
Transmission Sump
Capacity
35 -55 psi (2.46 -3.86 kg/cm2)
API specification CC or CD
12-Volt, 35 A-H, (-) negative ground
(recommended)
(45 A-H cold areas)
90 -125 (Ampere-Hours)
12-Volt sheathed type
glow plug
12-Volt, 1.2KW, solenoid, actuated shift
60 Amps at 11.5 Volts (6500 rpm, min.)
190 Amps at 12Volts
12-Volt DC, 50 Amps
Internal regulator, built into alternator
14.4 Volts DC ± 3 Volts
Case-hardened helical gears, with an intermediate
reverse gear. Reversing carried out by a servo
double disc system.
2.47:1
Right handed -standard transmission
180 x 12 P - 2 blade or 18 0 x 10 P - 3 blade
Propeller should allowthe engine to reach
its full rated
RPM (3600 + 000 -100) at full open
throttle while underway.
API specification of CC, CD, SC, SO, or SE
SAE 20W/20 or SAE 30 exclusively
(DO NOT mix grades of oil 1)
(DO NOT use multigrade oils !)
1 qt (1 liter)
17 Westerbeke Diesel Engines

W 42B FOUR MARINE DIESEL ENGINE
Engine Type
Governor
Valve Mechanism
Combustion Chamber
Bore & Stroke
Piston Displacement
Firing Order
Direction of Rotation
MaximumTorque (at 2500 rpm)
Compression Ratio
Compression Pressure
Valve Seat Angle
Valve Clearance
(engine cold)
Dimensions
Inclination
Dry Weight
Fuel Consumption
Idle Speed
Cruise RPM
Westerbeke Diesel Engines
GENERAL SPECIFICATIONS
Diesel, four-cycle, four-cylinder, fresh water-cooled,
vertical, in-line (42
hp at 3600 rpm, maximum)
Mechanical, centrifugal weight type
Overhead
Swirl chamber type
3.07 x 3.07 inches (78 x 78 mm)
90.93 cubic inches (1.49 liters)
1-3-2-4
Clockwise, when viewed from the front
561b-ft (7.74 kg-m)
23:1
455 psi (32 kg/cm2) at 320 rpm
Intake 45'
Exhaust 45'
Intake 0.0098 inches (0.25 mm)
Exhaust 0.0098 inches (0.25 mm)
Height: 23.70 inches (601.98 mm)
Width: 18.37 inches (466.60 mm) Max.
Length: 33.77 inches (857.76 mm)
Continuous
14'
Temporary 25' (not to exceed 30 min.)
4191bs (190 kgs)
0.42 U.S. gph (1.59 Iph) running at
2500 rpm (approximate)
750 -950 rpm
2500 -3000 rpm
18