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Electrical System

KohlerEngines.com

22 690 01 Rev. --

BATTERY CHARGING SYSTEM

CAUTION

Electrical Shock can cause injury.
Do not touch wires while engine is running.

NOTE: Observe following guidelines to avoid damage to

electrical system and components:
● Make sure battery polarity is correct. A negative (-)

ground system is used.

● Disconnect rectiﬁ er-regulator plug and/or wiring

harness plug before doing any electric welding on

equipment powered by engine. Disconnect all other

electrical accessories in common ground with engine.

● Prevent stator (AC) leads from touching or shorting

while engine is running. This could damage stator.

These engines are equipped with either a 12 or 15 amp,

regulated battery charging system.

Ignition System Components

Kill Switch/Oﬀ Position

of Key Switch

Air Gap

Flywheel

Magnet

Spark Plug

Ignition Module

Kill Terminal

Spark Plug Boot

There is 1 type of ignition system used on these engines.

This system uses an ignition module which energizes

spark plug.
This ignition system is designed to be trouble free for

life of engine. Other than periodically checking/replacing

spark plugs, no maintenance or timing adjustments

are necessary or possible. Mechanical systems do

occasionally fail or break down. Refer to Troubleshooting

to determine root of a reported problem.
Reported ignition problems are most often due to poor

connections. Before beginning test procedure, check

all external wiring. Be certain all ignition-related wires

are connected, including spark plug leads. Be certain all

terminal connections ﬁ t snugly. Make sure ignition switch

is in run position.

Fixed Ignition System

This system uses an inductive discharge (ID) coil.

Ignition timing and spark remains constant regardless of

engine speed. Timing of spark is controlled by location of

ﬂ ywheel magnet group as referenced to engine TDC. A

typical ﬁ xed ignition system consists of:
● 1 magnet assembly which is permanently aﬃ xed to

ﬂ ywheel.

● 1 electronic inductive-discharge ignition module which

mounts on engine crankcase.

● 1 kill switch (or key switch) which grounds module to

stop engine.

● 1 spark plug.

BATTERY

A 12-volt battery with 250 cold cranking amps (cca) is

generally recommended for starting in all conditions.

A smaller capacity battery is often suﬃ cient if an

application is started only in warmer temperatures.

Actual cold cranking requirement depends on engine

size, application, and starting temperatures. Cranking

requirements increase as temperatures decrease and

battery capacity shrinks. Refer to equipment's operating

instructions for speciﬁ c battery requirements.

Battery Size Recommendations

If battery charge is insuﬃ cient to turn over engine,

recharge battery.

Battery Maintenance

Regular maintenance is necessary to prolong battery
life.

Battery Test

To test battery, follow manufacturer's instructions.

Содержание KS530

Страница 1: ...stem 40 Lubrication System 42 Electrical System 55 Starter System 57 Emission Compliant Systems 60 Disassembly Inspection and Service 76 Reassembly IMPORTANT Read all safety precautions and instructio...

Страница 2: ...ting 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 Accidental Starts can cau...

Страница 3: ...air cleaner element if not equipped with precleaner Air Cleaner Intake Every 100 Hours or Annually whichever comes rst Replace air cleaner element if equipped with precleaner Air Cleaner Intake Chang...

Страница 4: ...ved and should NOT be used e ects of old stale or contaminated fuel are not warrantable Fuel must meet these requirements Clean fresh unleaded gasoline Octane rating of 87 R M 2 or higher Research Oct...

Страница 5: ...ilter D 100 0 mm 3 94 in E Oil Fill and Dipstick F 10 0 mm 0 39 in Lifting Point G Throttle Cable Clip H 109 0 mm 4 29 in I 46 5 mm 1 83 in J 85 1 mm 3 35 in K Connection for Evaporative Hose 7 32 I D...

Страница 6: ...rt F 81 3 mm 3 20 in G 64 0 mm 2 52 in Keyway Length H 7 16 20 UNF 2B IN 38 1 mm 1 50 in Depth I 250 3 mm 9 86 in to Exhaust Port J 2 X 30 0 mm 1 18 in K 21 6 21 8 mm 0 85 0 86 in Keyway Depth L 95 0...

Страница 7: ...M N O F J A 116 0 mm 4 57 in B 55 0 mm 2 17 in C 150 D Accessory Mounting Surface E 2 X 288 8 mm 11 37 in F 35 G Rotation Direction H 254 0 mm 10 00 in I 150 2 mm 5 91 in J 45 K 36 6 mm 1 44 in L 105...

Страница 8: ...Cable Clip G 324 9 mm 12 79 in H 226 7 mm 8 93 in Lifting Point I 215 7 mm 8 49 in J 14 5 mm 0 57 in Oil Filter Removal K 113 6 mm 4 47 in to Oil Filter L Oil Filter M Engine Mounting Surface N Oil D...

Страница 9: ...crew 16 5 mm 0 65 in Min Depth Accessory Mounting Location E 93 2 mm 3 67 in F Carburetor G Oil Drain Plug H 122 7 mm 4 83 in I 6 32 6 36 mm 0 249 0 250 in Keyway Width J 25 37 25 40 mm 0 999 1 0 in K...

Страница 10: ...0 KS590 KS595 Bore 94 mm 3 70 in Stroke 78 mm 3 1 in Displacement 541 cc 33 0 cu in Oil Capacity re ll 1 4 L 1 5 U S qt Maximum Angle of Operation full oil level 5 25 TORQUE SEQUENCES KS530 KS540 KS59...

Страница 11: ...com TORQUE SEQUENCES KS530 KS540 KS590 KS595 Refer to Torque Speci cations for torque values Closure Plate Fasteners 1 2 3 4 5 6 7 9 11 10 8 Cylinder Head Fasteners 1 2 3 4 5 6 Oil Passage Cover Faste...

Страница 12: ...n lb M6 Nut 9 N m 80 in lb Fuel Bowl Retaining Screws 4 0 N m 35 in lb Choke Wire Hold Down Clamp if equipped Fastener 2 7 N m 24 in lb Closure Plate torque sequence on page 11 Fastener 24 N m 212 in...

Страница 13: ...lb Module Fastener 8 8 N m 78 in lb into new hole 3 4 N m 30 in lb into used hole Recti er Regulator Fastener 8 8 N m 78 in lb Intake Manifold to Cylinder Head Nuts 10 2 N m 90 in lb Mu er Retaining...

Страница 14: ...to Crankpin Running Clearance New Max Wear Limit 0 040 0 081 mm 0 0016 0 0032 in 0 096 mm 0 0038 in Connecting Rod to Crankpin Side Clearance 0 400 0 630 mm 0 0157 0 0248 in Connecting Rod to Piston...

Страница 15: ...0 in T I R PTO End Crankshaft in Engine Entire Crankshaft in V Blocks 0 150 mm 0 0059 in 0 100 mm 0 0039 in Cylinder Bore Bore I D New 94 010 94 035 mm 3 7011 3 7021 in Max Wear Limit 94 073 mm 3 704...

Страница 16: ...x 1 000 1 250 mm 0 0394 0 0492 in 1 504 mm 0 0592 in Thrust Face O D 7 New 93 975 93 989 mm 3 6998 3 7003 in Max Wear Limit 93 875 mm 3 6960 in Piston Thrust Face to Cylinder Bore7 Running Clearance 0...

Страница 17: ...nglish Fastener Torque Recommendations for Standard Applications Bolts Screws Nuts and Fasteners Assembled Into Cast Iron or Steel Grade 2 or 5 Fasteners Into Aluminum Size Grade 2 Grade 5 Grade 8 Tig...

Страница 18: ...Kohler required tools Components of 25 761 39 S Ignition System Tester Cylinder Leakdown Tester Oil Pressure Test Kit Recti er Regulator Tester 120 V AC 60Hz Kohler 25 761 39 S Kohler 25 455 01 S Kohl...

Страница 19: ...ts of 25 761 20 S and 25 761 41 S CS PRO Regulator Test Harness Special Regulator Test Harness with Diode Kohler 25 761 20 S Kohler 25 761 41 S Design Technology Inc DTI 031R DTI 033R Spark Advance Mo...

Страница 20: ...ce is at 3 Find a 1 in long capscrew with correct thread size to match threads in connecting rod 4 Use a at washer with correct I D to slip on capscrew and approximately 1 in O D Assemble capscrew and...

Страница 21: ...re Weak spark TROUBLESHOOTING GUIDE When troubles occur be sure to check simple causes which at rst may seem too obvious to be considered For example a starting problem could be caused by an empty fue...

Страница 22: ...indications of improper t and seal Check air cleaner element Look for holes tears cracked or damaged sealing surfaces or other damage that could allow un ltered air into engine A dirty or clogged elem...

Страница 23: ...is a vacuum and movement to right indicates a pressure Digital tester depress test button on top of tester Crankcase vacuum should be a minimum of 10 2 cm 4 in of water If reading is below speci catio...

Страница 24: ...e use a breaker bar and socket on ywheel nut screw to hold it in position An assistant may be needed to hold breaker bar during testing If engine is mounted in a piece of equipment it may be possible...

Страница 25: ...water with detergent Rinse and allow to air dry 3 Lightly oil precleaner with new engine oil squeeze out excess oil 4 Reinstall precleaner over paper element Paper Element 1 Remove element from air cl...

Страница 26: ...positive pressures in crankcase activate pump When piston moves upward in cylinder negative pressure vacuum is created in crankcase and in air chamber of pump Diaphragm exes toward negative pressure...

Страница 27: ...e ow 3 Check operation of fuel pump a Remove fuel line from inlet tting of carburetor b Crank engine several times and observe ow Condition Conclusion Fuel at tip of spark plug Fuel is reaching combus...

Страница 28: ...e Plate Screw R Throttle Plate S Filter T Throttle Lever and Shaft Assembly These engines are equipped with a xed main jet carburetor Carburetors will have a low idle speed adjustment screw Troublesho...

Страница 29: ...er fuel inlet needle Remove fuel bowl Clean vent ports and air bleeds Blow out all passages with compressed air Float is cracked or damaged Replace oat Carburetor solenoid gasket damaged Replace gaske...

Страница 30: ...set to manufacturer s recommendation turn adjustment screw on speed control bracket in clockwise to increase or out counterclockwise to decrease RPM speed High Speed RPM Adjustment 1 With engine runni...

Страница 31: ...ottle lever will contact idle speed screw when moved to closed position Inspect edge of new throttle plate Note that edge is chamfered to seal against throttle bore of carburetor when closed Installin...

Страница 32: ...is cold a spring on diaphragm in conjunction with a bimetallic spring will hold choke closed for starting When engine is warm bimetallic spring holds choke completely open while engine is running Cho...

Страница 33: ...not be any binding when choke shaft assembly is rotated which could cause choke to remain partially open 6 Check choke linkage for binding or debris build up Gently actuate linkage and observe that ch...

Страница 34: ...utral 3 Activate starter switch Release switch as soon as engine starts If starter does not turn engine over shut starter o immediately Do not make further attempts to start engine until condition is...

Страница 35: ...nt is in neutral 3 Activate starter switch Release switch as soon as engine starts 4 For Operation After engine starts move throttle choke control from fast choke ON position and set desired engine op...

Страница 36: ...should not move SEPARATE THROTTLE AND CHOKE CONTROL Some engines are equipped with separate throttle and choke controls This allows you to adjust choke and throttle controls individually Install Sepa...

Страница 37: ...tially on until engine warms up 4 For a Warm Engine Return choke to o position as soon as engine starts Changing High Speed RPM on Engines with Separate Controls Increase or Decrease RPM Speed Control...

Страница 38: ...trifugal yweight mechanical governor Governor gear yweight mechanism of mechanical governor is mounted inside closure plate and is driven o gear on crankshaft Governor Components F O N M Inside Engine...

Страница 39: ...rnor arm to open throttle plate wider This allows more fuel into engine increasing engine speed As speed reaches governed setting governor spring tension and force applied by regulating pin will again...

Страница 40: ...k 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...

Страница 41: ...2 5 PSI tester should indicated a change to continuity contacts closed between terminal 1 and terminal 3 on switch Continuity condition between 1 and 3 terminals should remain closed while pressure is...

Страница 42: ...d problem Reported ignition problems are most often due to poor connections Before beginning test procedure check all external wiring Be certain all ignition related wires are connected including spar...

Страница 43: ...AC B L U B A Red B Green C Violet D White E Spark Plug F Optional Fuel Shut o Solenoid G Optional Oil Sentry Switch Indicator H Bendix Starter I Engine Connector J Starter Solenoid K Ground To Kill Le...

Страница 44: ...White E Spark Plug F Fuel Shut o Solenoid G 3 Terminal Oil Sentry Switch Indicator H Bendix Starter I Engine Connector J Starter Solenoid K Ground To Kill Lead L Key Switch M Optional Oil Sentry N Opt...

Страница 45: ...U V L V V A Red B Green C Violet D White E Spark Plug F Fuel Shut o Solenoid G Optional Oil Sentry Switch Indicator H Bendix Starter I Engine Connector J Starter Solenoid K Ground To Kill Lead L Key S...

Страница 46: ...P A Red B Green C Violet D White E Spark Plug F Fuel Shut o Solenoid G Optional Oil Sentry Switch Indicator H Bendix Starter I Engine Connector J Starter Solenoid K Ground To Kill Lead L Key Switch M...

Страница 47: ...m is overcharging Replace recti er regulator iii If voltage stays at 12 5 VDC or decreases charging system is NOT operating proceed to step 4 4 With engine o unplug recti er regulator connector and in...

Страница 48: ...eeler gauge Adjust gap to 0 76 mm 0 030 in 2 Install plug into cylinder head 3 Torque plug to 27 N m 20 ft lb Inspection Inspect each spark plug as it is removed from cylinder head Deposits on tip are...

Страница 49: ...y that is hooked up or charged backward will crank engine but it won t have spark Be certain drive is in neutral and all external loads are disconnected Test Ignition Systems NOTE If engine starts or...

Страница 50: ...System Make sure engine ignition switch kill switch or key switch is in RUN position Check wires and terminals of ignition module and other components for accidental grounding and damaged insulation...

Страница 51: ...ent at yellow wire of 6 pin connector this is an indication that engine kill wire is grounded equipment safety circuit has been activated through a seat switch PTO switch operator present switch if eq...

Страница 52: ...o ground Conclusion Refer to equipment manual for inspection repair procedures or repair white kill wire short Condition Engine cranks but will not start Key Switch Safety Circuit Yellow Wire Volts So...

Страница 53: ...LAY CIRCUIT on previous pages for troubleshooting fuel relay part of circuit Blade stop stator brake circuit is provided as a safety feature to ensure application can meet ANSI American National Stand...

Страница 54: ...full speed condition Condition Conclusion Voltage does not increase Shut down engine remove stator brake relay from its socket and retest at full engine speed If battery voltage does not increase wit...

Страница 55: ...ing Clean corroded connections and tighten loose connections Replace wires in poor condition and with frayed or broken insulation Starter Switch or Solenoid By pass switch or solenoid with a jumper wi...

Страница 56: ...p while cranking stop test and perform a battery load test D E A C B F D D E G H I J K A Test 1 Battery Voltage Test Static B Test 2 Voltage Drop Across Battery Cranking C Test 3 Voltage Drop Across S...

Страница 57: ...r supplied canisters breather lter can be removed and cleaned with hot soapy water dried and reinstalled Do not oil breather screen This is done periodically or if system operation is suspect Carbon c...

Страница 58: ...drawn through an inlet screen of secondary air valve Air is then drawn into exhaust manifold and mu er where it mixes with any unburned hydrocarbons which then burn in heat of mu er A hose is connect...

Страница 59: ...et screen from secondary air valve assembly by grasping inlet screen at base and gently pulling away from valve assembly 2 Use a soft brush to remove debris from screen 3 Run water through inlet scree...

Страница 60: ...gine Components B O N P O R H A D J V J I T S T C I K U W T T M Q L E G F A Oil Fill Dipstick B Oil Fill Dipstick Tube C Oil Filter D Oil Drain Plug E Air Cleaner Adapter F Intake Manifold G Intake Ma...

Страница 61: ...r adapter Remove Fuel Pump if equipped NOTE Inlet outlet and pulse lines can remain on fuel pump unless replacement is required NOTE Unless fuel pump is being replaced disassembly from fuel pump brack...

Страница 62: ...take studs Turn assembly 90 to remove choke linkage from speed control bracket Remove and discard intake manifold gasket Smart ChokeTM Slide assembly forward and o intake studs Remove and discard inta...

Страница 63: ...ssure switch is installed into closure plate 1 Cut wire tie securing lead to switch 2 Disconnect lead or remove connector from Oil Sentry pressure switch 3 Remove pressure switch from closure plate Re...

Страница 64: ...shaft 3 Carefully lift cooling fan to disengage two drive pins and remove it from ywheel 4 Reinstall ywheel retaining screw 5 Install an anchor bolt assembly see Tools and Aids in each hole of ywheel...

Страница 65: ...Ba e Remove screws attaching cylinder head ba e to cylinder head and remove cylinder head ba e Remove Valve Cover A B A Valve Cover B Screw NOTE Valve cover is sealed to cylinder head using RTV silico...

Страница 66: ...valve train components that will be reused to ensure they are reassembled on same side 1 Loosen inner set screws T15 Torx Drive and back o rocker arm adjusting nuts Remove push rods and mark them so...

Страница 67: ...d guides Hard starting or loss of power accompanied by high fuel consumption may be symptoms of faulty valves Although these symptoms could also be attributed to worn rings remove and check valves rst...

Страница 68: ...ced if deteriorated or damaged in any way Never reuse an old seal Remove Breather F C A B D E A Breather Cover Screw B Breather Cover C Torx Screw D Reed Retainer E Breather Reed F Breather Filter NOT...

Страница 69: ...rotates freely Governor Gear Inspection Inspect governor gear teeth Look for any evidence of worn chipped or cracked teeth If one or more of these problems is noted replace governor gear Gear is held...

Страница 70: ...educed compression at cranking speeds several important bene ts are obtained 1 Electric start models can use a smaller starter and battery which are more practical for application 2 ACR eliminates nee...

Страница 71: ...ated by excessive oil consumption and blue exhaust smoke When rings fail oil is allowed to enter combustion chamber where it is burned along with fuel High oil consumption can also occur when piston r...

Страница 72: ...025 0 065 mm 0 0010 0 0026 in and middle compression ring to groove side clearance 0 040 0 080 mm 0 0016 0 032 in If side clearance is greater than speci ed a new piston must be used Piston and Rings...

Страница 73: ...placed Inspect crankshaft keyways If worn or chipped replacement of crankshaft will be necessary Inspect crankpin for wear score marks or aluminum transfer Slight score marks can be cleaned with crocu...

Страница 74: ...A A Oil Ba e Screws B Oil Ba e Remove screws securing oil ba e to bottom of crankcase remove oil ba e Remove PTO Side Oil Seal Use a seal puller to remove PTO side oil seal Crankcase Inspection and Se...

Страница 75: ...rements These measurements should be taken at three locations in cylinder at top middle and bottom Two measurements should be taken perpendicular to each other at 3 di erent locations Clean Cylinder B...

Страница 76: ...ld sealing material has been removed Use gasket remover lacquer thinner or paint remover to remove any remaining traces Clean surfaces with isopropyl alcohol acetone lacquer thinner or electrical cont...

Страница 77: ...l Pump Assembly C Oil Pump Housing Screws 1 Lightly grease gerotor gears and set them into crankcase 2 Install oil pump housing and secure to crankcase with screws torque screws to 4 8 N m 42 in lb 3...

Страница 78: ...re circumference Use a soft rubber grip hammer handle and tap piston connecting rod into bore First tap should be rather rm so oil ring moves from compressor into bore in one smooth quick motion Other...

Страница 79: ...tall Closure Plate Closure Plate Sealant Pattern on Crankcase A A Sealant Bead on Crankcase Closure Plate Fastener Torque Sequence 1 2 3 4 5 6 7 8 9 10 11 NOTE Always use fresh sealant Using outdated...

Страница 80: ...efer to Tools and Aids for a listing of approved sealants 1 Install breather lter into closure plate 2 Install breather reed and reed retainer hold them in alignment and secure with screw Torque screw...

Страница 81: ...cylinder head screws or gasket always replace with new parts NOTE If crankshaft has not been turned since installation of crank gear turn it one 1 complete revolution This will set piston at top dead...

Страница 82: ...other valve After tightening recheck adjustment Proper valve clearance is 0 101 0 152 mm 0 004 0 006 in Install Valve Cover Valve Cover Sealant Pattern Valve Cover Torque Sequence 2 3 4 1 NOTE Always...

Страница 83: ...talled NOTE Always use a ywheel strap wrench or ywheel holding tool to hold ywheel when tightening ywheel fastener Do not use any type of bar or wedge between cooling ns or ywheel ring gear as these p...

Страница 84: ...gulator B Connector 1 Attach connector to recti er regulator terminals 2 Using M6 screws mount recti er regulator onto crankcase bosses with cooling ns out Torque screws to 8 8 N m 78 in lb Install Oi...

Страница 85: ...rottle lever on carburetor Install throttle linkage and linkage spring into throttle lever Smart ChokeTM A B D E F G L J I L K H I M C A Air Cleaner Adapter B Nut C Carburetor Gasket Choke D Indicator...

Страница 86: ...3400 No Brown 3300 No Brown 3200 No Brown 2800 No Blue Connect Wire Controls D B A C A Choke Linkage B Control Bracket Lower Hole C Control Bracket Slot D Governor Spring Location in Control Bracket...

Страница 87: ...n Plug E Air Cleaner Adapter F Intake Manifold G Intake Manifold Nut H Standard Air Cleaner Cover I Precleaner J Paper Element K PRO Air Cleaner Cover L Fuel Filter M Pulse Line N Outlet Fuel Line O L...

Страница 88: ...ure Install Drain Plug Oil Filter and Oil 1 Install oil drain plug Torque plug to 14 N m 125 in lb 2 Place new lter in shallow pan with open end up Fill with new oil until oil reaches bottom of thread...

Страница 89: ...89 22 690 01 Rev KohlerEngines com...

Страница 90: ...90 KohlerEngines com 22 690 01 Rev...

Страница 91: ...91 22 690 01 Rev KohlerEngines com...

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