Kohler Command PRO EFI PCV850 User manual

19 590 02 Rev. A KohlerEngines.com
IMPORTANT: Read all safety precautions and instructions carefully before
operating equipment. Refer to operating instruction of
equipment that this engine powers.
Ensure engine is stopped and level before performing any
maintenance or service.
Warranty coverage as outlined in warranty card and on
KohlerEngines.com. Please review carefully as it provides you
specic rights and obligations.
To maintain compliance with applicable emission regulations,
exhaust system backpressure may not exceed limits which can
be found on KohlerEngines.com. Search by Model No., select
Read More, then select Specs tab.
Record engine information to reference when ordering parts or obtaining warranty coverage.
Engine Model
Specication
Serial Number
Purchase Date
EN
ESS
FRC
Owner's Manual
PCV850, PCV860

219 590 02 Rev. AKohlerEngines.com
Safety Precautions
WARNING: A hazard that could result in death, serious injury, or substantial property damage.
CAUTION: A hazard that could result in minor personal injury or property damage.
NOTE: is used to notify people of important installation, operation, or maintenance information.
WARNING
Explosive Fuel
can cause res
and severe
burns.
If a gaseous
odor is detected,
ventilate area
and contact
an authorized
service
technician.
Propane is extremely
ammable and is heavier
than air and tends to settle
in low areas where a spark
or ame could ignite gas.
Do not start or operate this
engine in a poorly ventilated
area where leaking gas
could accumulate and
endanger safety of persons
in area.
To ensure personal safety,
installation and repair
of propane fuel supply
systems must be performed
only by qualied propane
system technicians.
Improperly installed and
maintained propane
equipment could cause
fuel supply system or other
components to malfunction,
causing gas leaks.
Observe federal, state
and local laws governing
propane fuel, storage, and
systems.
WARNING
Carbon
Monoxide can
cause severe
nausea, fainting
or death.
Avoid inhaling
exhaust fumes.
Engine exhaust gases
contain poisonous carbon
monoxide. Carbon
monoxide is odorless,
colorless, and can cause
death if inhaled.
WARNING
High Pressure
Fluids can
puncture skin
and cause
severe injury or
death.
Do not work
on fuel system
without proper
training or safety
equipment.
Fluid puncture injuries are
highly toxic and hazardous.
If an injury occurs, seek
immediate medical attention.
WARNING
Rotating Parts
can cause
severe injury.
Stay away while
engine is in
operation.
Keep hands, feet, hair,
and clothing away from all
moving parts to prevent
injury. Never operate engine
with covers, shrouds, or
guards removed.
CAUTION
Electrical Shock
can cause injury.
Do not touch
wires while
engine is
running.
California Proposition 65 Warning
Engine exhaust from this product contains chemicals known
to State of California to cause cancer, birth defects, or other
reproductive harm.
WARNING
Accidental
Starts can cause
severe injury or
death.
Disconnect and
ground spark
plug lead(s)
before servicing.
Before working on engine or
equipment, disable engine
as follows: 1) Disconnect
spark plug lead(s). 2)
Disconnect negative (–)
battery cable from battery.
Before disconnecting
negative (-) ground cable,
make sure all switches
are OFF. If ON, a spark
will occur at ground cable
terminal which could cause
an explosion if hydrogen
gas or propane fuel vapors
are present.
WARNING
Hot Parts can
cause severe
burns.
Do not touch
engine while
operating or just
after stopping.
Never operate engine with
heat shields or guards
removed.
California Proposition 65 Warning
This product contains chemicals known to State of California to
cause cancer, birth defects, or other reproductive harm.

3
19 590 02 Rev. A KohlerEngines.com
EN
B
I
F
D
N
E
J
G
H
C
K
A
ML
P
Q
O
R
AEnd Cap BRetaining Clip CEjector Area DElement
EInner Element
(if equipped) FInlet Screen GAir Cleaner Housing HHeavy-Duty Air Cleaner
IOil Cooler (if
equipped) JOil Fill/Dipstick KVaporizer/ Regulator LOil Drain Plug
MOil Filter NSpark Plug OLock-Off PVaporizer/ Regulator Drain
Plug
QVaporizer/ Regulator Inlet
Filter RUnique EFI
Fuel Filter
Visit KohlerEngines.com for service parts information and purchasing options.

419 590 02 Rev. AKohlerEngines.com
Cold Weather Starting Hints
1. Use proper oil for temperature expected.
2. Disengage all possible external loads.
Stopping
1. If possible, remove load by disengaging all
PTO driven attachments.
2. Turn fuel valve to full closed position and
allow engine to continue running until it runs
out of fuel. Turn key switch to OFF position.
Angle of Operation
Refer to operating instructions of equipment
this engine powers. Do not operate this engine
exceeding maximum angle of operation; see
specication table. Engine damage could result
from insufcient lubrication.
Engine Speed
NOTE: Do not tamper with governor setting to
increase maximum engine speed.
Overspeed is hazardous and will void
warranty.
Pre-Start Checklist
1. Check oil level. Add oil if low. Do not overll.
2. Check fuel gauge (if equipped). If propane
tank is low, have it relled. Check fuel system
components and lines for leaks.
3. Check and clean cooling areas, air intake
areas and external surfaces of engine
(particularly after storage).
4. Check that air cleaner components and all
shrouds, equipment covers, and guards are
in place and securely fastened.
5. Check spark arrestor (if equipped).
Starting
WARNING
Carbon Monoxide can cause
severe nausea, fainting or death.
Avoid inhaling exhaust fumes.
Engine exhaust gases contain poisonous
carbon monoxide. Carbon monoxide is
odorless, colorless, and can cause death if
inhaled.
WARNING
Rotating Parts can cause severe
injury.
Stay away while engine is in
operation.
Keep hands, feet, hair, and clothing away
from all moving parts to prevent injury. Never
operate engine with covers, shrouds, or
guards removed.
NOTE: Do not crank engine continuously for
more than 10 seconds. Allow a 60
second cool down period between
starting attempts. Failure to follow
these guidelines can burn out starter
motor.
1. Place throttle control midway between slow
and fast positions.
2. Slowly turn fuel valve on propane tank to full
open position.
3. Turn key switch to START position. Release
switch as soon as engine starts. If starter
does not turn engine over, shut off key switch
immediately. Do not make further attempts to
start engine until condition is corrected. Do
not jump start. See your Kohler authorized
dealer for trouble analysis.

5
19 590 02 Rev. A KohlerEngines.com
EN
Maintenance Instructions
WARNING Before working on engine or equipment, disable
engine as follows: 1) Disconnect spark plug
lead(s). 2) Disconnect negative (–) battery cable
from battery.
Accidental Starts can cause
severe injury or death.
Disconnect and ground spark
plug lead(s) before servicing.
Normal maintenance, replacement or repair of emission control devices and systems may be
performed by any repair establishment or individual; however, warranty repairs must be performed
by a Kohler authorized dealer found at KohlerEngines.com or 1-800-544-2444 (U.S. and Canada).
For safety and health reasons, many states require special licensing or certication for servicing
propane fuel systems. Check local and state regulations before choosing a repair establishment to
perform fuel system repairs.
Maintenance Schedule
Every 100 Hours or Annually1
● Change oil. Oil lter is recommended.
● Remove cooling shrouds and clean cooling areas.
Every 150 Hours1
● Check air cleaner element.
● Check oil cooler ns, clean as necessary (if equipped).
Every 200 Hours1
● Change oil lter.
● Replace unique EFI fuel lters.
Every 300 Hours1
● Replace air cleaner element and check inner element (if equipped).
Every 500 Hours or Annually1
● Check all lines (high pressure/vacuum) including ttings for leaks.
● Drain vaporizer/regulator of accumulated fuel deposits.
● Replace spark plugs and set gap.
Every 500 Hours or Annually1,2
● Inspect lock-off assembly for damage/leakage.
● Have combustion deposits removed if using non-synthetic oil.
Every 600 Hours1
● Replace air cleaner inner element (if equipped).
Every 600 Hours1,3
● Have valve lash checked/adjusted.
Every 1500 Hours1,2
● Have vaporizer/regulator tested.
1Perform these procedures more frequently under severe, dusty, dirty conditions.
2 Must be performed by a Kohler authorized dealer or qualied propane personnel only.
3Have a Kohler authorized dealer perform this service.

619 590 02 Rev. AKohlerEngines.com
Change Oil and Filter
Change oil while engine is warm.
1. Clean area around oil ll cap/dipstick and
drain plug. Remove drain plug and oil ll cap/
dipstick. Allow oil to drain completely.
2. Clean area around oil lter. Place a container
under lter to catch any oil and remove lter.
Wipe off mounting surface. Reinstall drain
plug. Torque to 15.7 ft. lb. (21.4 N·m).
3. Place new lter in shallow pan with open end
up. Fill with new oil until oil reaches bottom of
threads. Allow 2 minutes for oil to be
absorbed by lter material.
4. Apply a thin lm of clean oil to rubber gasket
on new lter.
5. Refer to instructions on oil lter for proper
installation.
6. Fill crankcase with new oil. Level should be
at top of indicator on dipstick.
7. Reinstall oil ll cap/dipstick and tighten
securely.
8. Start engine; check for oil leaks. Stop engine;
correct leaks. Recheck oil level.
9. Dispose of used oil and lter in accordance
with local ordinances.
Oil Sentry™(if equipped)
This switch is designed to prevent engine
from starting in a low oil or no oil condition. Oil
Sentry™may not shut down a running engine
before damage occurs. In some applications
this switch may activate a warning signal. Read
your equipment manuals for more information.
Oil Recommendations
Synthetic oil is recommended for use in
propane fueled engines. Non-synthetic oil must
be low ash* rated oil. Oils (including synthetic)
must meet API (American Petroleum Institute)
service class SG, SH, SJ, or SL. Select
viscosity based on air temperature at time of
operation as shown in table below.
*Low ash is dened as less than 1% sulfated
ash.
°F -20 020324060
50 80 100
°C -30 -20 -10 0 10 20 30 40
5W-30
10W-30
SAE 30
Check Oil Level
NOTE: To prevent extensive engine wear or
damage, never run engine with oil level
below or above operating range
indicator on dipstick.
Ensure engine is cool. Clean oil ll/dipstick
areas of any debris.
1. Remove dipstick; wipe oil off.
2. Reinsert dipstick into tube; press completely
down.
3. Remove dipstick; check oil level. Level
should be at top of indicator on dipstick.
4. If oil is low on indicator, add oil up to top of
indicator mark.
5. Reinstall and secure dipstick.

7
19 590 02 Rev. A KohlerEngines.com
EN
Fuel Recommendations
WARNING
Explosive Fuel can cause res
and severe burns.
If a gaseous odor is detected,
ventilate area and contact an
authorized service technician.
Propane is extremely ammable and is
heavier than air and tends to settle in low
areas where a spark or ame could ignite
gas. Do not start or operate this engine in
a poorly ventilated area where leaking gas
could accumulate and endanger safety of
persons in area.
To ensure personal safety, installation and
repair of propane fuel supply systems must
be performed only by qualied propane
system technicians. Improperly installed and
maintained propane equipment could cause
fuel supply system or other components to
malfunction, causing gas leaks.
Observe federal, state and local laws
governing propane fuel, storage, and
systems.
This engine is certied to operate on
commercial propane (per GPA STD 2140). If
you have any questions, contact your propane
supplier.
Propane from an appropriate propane fuel tank
(supplied separately) is required to operate this
engine.
Vaporizer/Regulator
In compliance with government emission
standards, vaporizer/regulator is preset
at factory to provide proper supply of fuel.
No adjustment or resetting of vaporizer/
regulator is to be made. All service relating to
vaporizer/regulator must be performed by a
Kohler authorized dealer or qualied propane
personnel only.
Vaporizer/regulator can change propane from
supply tank to a gaseous/vapor state.
Lock-Off assembly opens and closes controlling
fuel ow from supply tank before reaching
vaporizer/regulator.
Over time, fuel deposits can accumulate inside
vaporizer/regulator. Removing these deposits
is recommended. Follow steps below to drain
vaporizer/regulators.
1. Turn fuel supply valve off, run engine out of
fuel, and turn off ignition switch.
2. Disconnect and ground spark plug leads.
3. Remove drain plug from bottom of vaporizer/
regulator. Remove any accumulated
deposits.
4. Reinstall plug and tighten securely. If
required, a replacement plug can be found at
KohlerEngines.com.
Fuel Line
High pressure fuel line meeting a minimum of
SAE R7 standard must be installed on Kohler
Co. engines equipped with propane EFI system
(from vaporizer/regulator to injectors).
Spark Plugs
CAUTION
Electrical Shock can cause injury.
Do not touch wires while engine
is running.
Clean out spark plug recess. Remove plug and
replace.
1. Check gap using wire feeler gauge. Adjust
gap, see specication table for adjustment.
2. Install plug into cylinder head.
3. Torque plug to 20 ft. lb. (27 N·m).
Jump Starting
Follow all safety guidelines and procedures
provided by battery manufacturer and/or
original equipment manufacturer (OEM). Failure
to follow proper procedures may result in
serious personal injury and/or non-warrantable
damage to engine’s EFI components.
Electronic Fuel Injection (EFI) System
EFI is an electronically-controlled fuel
management system which is monitored by an
Electronic Control Unit (ECU). A Malfunction
Indicator Light (MIL) will illuminate if problems
or faults are detected. Servicing by a Kohler
authorized dealer is necessary.
Fuel System Components
Engines are equipped with special EFI fuel
lters. See Maintenance Schedule.
Fuse Replacement
This engine has three (3) blade type automotive
fuses. Replacement fuses must have same
rating as blown fuse. Use fuse chart below to
determine correct fuse.
Wire Color Fuse Rating
2 Solid Red Wires 10-amp Fuse
1 Red Wire with Black Stripe
1 Red Wire with White Stripe 10-amp Fuse
2 Purple Wires 30-amp Fuse

819 590 02 Rev. AKohlerEngines.com
Air Cooling
WARNING
Hot Parts can cause severe
burns.
Do not touch engine while
operating or just after stopping.
Never operate engine with heat shields or
guards removed.
Proper cooling is essential. To prevent over
heating, clean screens, cooling ns, and other
external surfaces of engine. Avoid spraying
water at wiring harness or any electrical
components. See Maintenance Schedule.
Repairs/Service Parts
We recommend that you use a Kohler
authorized dealer for all maintenance, service,
and engine parts. To nd a Kohler authorized
dealer visit KohlerEngines.com or call 1-800-
544-2444 (U.S. and Canada).
Storage
If engine will be out of service for 2 months or
more follow procedure below.
1. Change oil while engine is still warm from
operation. Remove spark plug(s) and pour
about 1 oz. of engine oil into cylinder(s).
Replace spark plug(s) and crank engine
slowly to distribute oil.
2. Disconnect negative (-) battery cable.
3. Separate propane tank from unit and store
separately in an area designated for safe
propane tank storage.
4. Store engine in a clean, dry place.
Air Cleaner
NOTE: Operating engine with loose or
damaged air cleaner components
could cause premature wear and
failure. Replace all bent or damaged
components.
NOTE: Paper element cannot be blown out
with compressed air.
1. Unhook retaining clips and remove end
cap(s).
2. Check and clean inlet screen (if equipped).
3. Pull air cleaner element out of housing and
replace. Check condition of inner element (if
equipped); replace when dirty.
4. Check all parts for wear, cracks, or damage,
and that ejector area is clean.
5. Install new element(s).
6. Reinstall end cap(s) with dust ejector valve/
screen down; secure with retaining clips.
Breather Tube
Ensure both ends of breather tube are properly
connected.
Oil Cooler (if equipped)
1. Clean ns with a brush or compressed air.
2. Remove two screws securing oil cooler, and
tilt to clean back side.
3. Reinstall oil cooler.

9
19 590 02 Rev. A KohlerEngines.com
EN
Troubleshooting
Do not attempt to service or replace major engine components, or any items that require special timing or adjustment procedures. This work should be performed by a Kohler authorized dealer.
Possible Cause
Problem
No Fuel
Tank
Nearly
Empty Improper
Fuel Dirt In
Fuel Line Broken
Fusible Link
Dirty/
Restricted
Vaporizer/
Regulator
Inlet Filter
Dirty
Debris
Screen Incorrect
Oil Level Engine
Overloaded Dirty Air
Cleaner
Faulty
Spark
Plug
Dirty/
Restricted
Vaporizer/
Regulator
Will Not Start ● ● ● ● ● ● ● ● ● ● Hard Starting ● ● ● ● ● ● ● ● ● ● Stops Suddenly ● ● ● ● ● ● ● ● Lacks Power ● ● ● ● ● ● ● ● ● ●
Operates Erratically ● ● ● ● ● ● ● ●
Knocks or Pings ● ● ● ● ● ● Skips or Misres ● ● ● ● ● ● ● Backres ● ● ● ● ● Overheats ● ● ● ● ● ● ● ● High Fuel Consumption ● ●

10 19 590 02 Rev. AKohlerEngines.com
Engine Specications
Model Bore Stroke Displacement Oil Capacity
(Rell) Spark Plug
Gap
Maximum Angle
of Operation
(@ full oil level)*
PCV850 3.39 in.
(86 mm) 2.79 in. (70.9 mm) 50.3 cu. in. (824 cc) 2.7 U.S. qt. (2.6 L) 0.03 in.
(0.76 mm) 25°
PCV860
*Exceeding maximum angle of operation may cause engine damage from insufcient lubrication.
Additional specication information can be found in service manual at KohlerEngines.com.
Exhaust Emission Control System for models PCV850 and PCV860 is EM, O2S, ECM, MPI for
U.S. EPA, California, and Europe.
Any and all horsepower (hp) references by Kohler are Certied Power Ratings and per SAE J1940
& J1995 hp standards. Details on Certied Power Ratings can be found at KohlerEngines.com.