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Westerbeke L25 Technical Manual
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Westerbeke L25 Technical Manual

Westerbeke L25 Technical Manual

Marine diesel engine
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TECHNICAL MANUAL
WESTERBEKE L25
Marine Diesel Engine
PUBLICATION 19419
EDITION 3
MAY 1978
~r-.v-
'WESTERBEKE
J
WESTERBEKECORPORATION
•
MYLES STANDISH INDUSTRIAL PARK
150 JOHN HANCOCK ROAD, TAUNTON, MA 02780-7319

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Summary of Contents for Westerbeke L25

  • Page 1 TECHNICAL MANUAL WESTERBEKE L25 Marine Diesel Engine PUBLICATION 19419 EDITION 3 MAY 1978 ~r-.v- 'WESTERBEKE WESTERBEKECORPORATION • MYLES STANDISH INDUSTRIAL PARK 150 JOHN HANCOCK ROAD, TAUNTON, MA 02780-7319...
  • Page 2 TECHNICAL MANUAL WESTERBEKE L25 Marine Diesel Engine PUBLICATION 19419 EDITION 3 MAY 1978 ~r-.v- 'WESTERBEKE WESTERBEKECORPORATION • MYLES STANDISH INDUSTRIAL PARK 150 JOHN HANCOCK ROAD, TAUNTON, MA 02780-7319...
  • Page 3 SECTION INDEX GENERAL. Introduction Operation Installation Maintenance ENGINE OVERHAUL OTHER OVERHAUL Marine Engine Electrical System Cooling System (External) Transmissions GENERATOR SETS HYDRAULIC CRANKING SYSTEM SERVICE BULLETINS...
  • Page 4 YOUR NOTES...
  • Page 5 INTRODUCTION IMPORTANT THIS MANUAL IS A DETAILED GUIDE TO THE INSTALLATION, START-UP, OPERATION AND MAINTENANCE OF YOUR WESTERBEKE MARINE DIESEL ENGINE. THE INFORMA- TION IT CONTAINS IS VITAL TO THE ENGINE'S DEPENDABLE, LONG TERM OPERA- TION. READ IT KEEP IT IN A SAFE PLACE...
  • Page 7 J. H. to position as soon as the restriction has Westerbeke Corporation. been passed. In case it is necessary to hoist the RIGGING AND LIFTING engine either front end upwards or reverse The engine is fitted with lifting rings.
  • Page 8 PROPELLER COUPLING FOUNDATION FOR ENGINE A good engine bed contributes much Each Westerbeke Diesel engine is regu- toward the satisfactory operation of the larly fitted with a suitable coupling for engine. The engine bed must be of rigid connecting the propeller shaft to the engine.
  • Page 9 In making the final check for alignment, ment at frequent intervals and to correct the engine half coupling should be held in any errors when they may appear. one position and the alignment with the Misalignment between the engine and the propeller coupling tested with the propeller propeller shaft is the cause of troubles which are blamed often on other causes.
  • Page 10 support for the rubber hose to prevent cause rapid deterioration. Galvanized iron fittings and galvanized iron pipe is sagging, bending, and formation of water pockets. recommended for the exhaust line. The ex- haust line must be at least as large as Always arrange that water discharge into the rubber hose section is behind a the engine exhaust manifold flange and be...
  • Page 11 ELECTRIC PANEL interior is gel coated to prevent fibers The Westerbeke all-electric panel util- from contaminating the fuel system. izes an electronic tachometer with a Copper or galvanized fuel tanks should not built-in hour meter.
  • Page 12 plied, especially those relating to fuse/ cicuit breaker requirements. Starter batteries should be located as close to the engine as possible to avoid voltage drop through long leads. It is bad practice to use the starter batteries for other services unless they require low amperage or are intermittent'.
  • Page 13 OPERATION BLEEDING THE SYSTEM PREPARATION FOR FIRST START The engine is shipped "dry" •.• with lub- The fuel injection system of a compres- ricating oil drained from the crankcase sion ignition engine depends upon very and transmission. Therefore, be sure to high fuel pressure during the injection stroke to function correctly.
  • Page 14 Fig. 1 for mechanically governed and Fig. bleeding proceeds as follows. "0" Leave the governor bleed screw 2 for hydraulically governed pumps. slackened. Next slacken any two injector pipe line connections at the injector end. Set the throttle to the fully open pos- ition and turn the engine until fuel free from air flows from the unions.
  • Page 15 cap when refueling - see that it doesn't Do be careful to check with the engine pick up dirt or grit - this is how quite parts list regarding whether the engine a lot of dirt gets into the tank. requires injector seating washers or not.
  • Page 16 gine can be warmed up with the clutch reading after a stop does not neces- in neutral at 1000 rpm. Warming up sarily signal alarm against restarting. with clutch in neutral takes longer and If there is no functional difficulty, tends to overheat the transmission, if temperatures will quickly return to partial engagement occurs, which can be...
  • Page 17 TEN MUST RULES IMPORTANT IMPORTANT IMPORTANT ••• for your safety and your engine's dependability. ALWAYS - 1. Keep this Manual handy and read it whenever in doubt. 2. Use only filtered fuel oil and check lube oil level daily. 3. Check cooling water temperature frequently to make sure it is 190 or less.
  • Page 18 YOUR NOTES...
  • Page 19 MAINTENANCE PERIODIC ATTENTION: After you have taken delivery of your engine, it is important that you make the following checks right after the first fifty hours of its operation: FIFTY HOUR CHECKOUT (INITIAL) Do the following: 1. Retorque the cylinder head bolts. 2.
  • Page 20 CAUTION: The use of different brands of 3. Fill fresh water cooling system with lubricating oils during oil changes has antifreeze of a reputable make. (Refer been known to cause extensive oil sludg- to Cold Weather Precautions.) ing and may in many instances cause com- 4.
  • Page 21 LUBRICATING OILS Lubricating oils are available for Westerbeke Diesel engines which offer an improved standard of performance to meet the requirements of modern operating conditions such as sustained high speeds and temperatures.· These oils meet the requirements of the U. S. Ordnance Specification MIL-L-2l04B (API Service CC).
  • Page 22 YOUR NOTES...
  • Page 23 ENGINE OVERHAUL Two series of engines have been used referred to in the text as MK 3 and MK 4. They can be identified by the 2 letter prefix in the serial number. The MK 3 prefix is SP and the MK 4 is FK. TECHNICAL DATA 1,2,4,3 Firing order...
  • Page 24 Camshaft Valve timing Steel backed white metal bush Bearings 0'020 in. (0'513 mm.) o/s on 00 std. 10 Oversize bearings available 1'5597to 1'5605 in. (39·617t039·637mm.) Journal diameter 0'0025 to 0'0075 in. (0'064 to 0·191 mm.) End-float Connecting Rods and Big End Bearings Length between centres 4·927 to 4·929 in.
  • Page 25 Cylinder Head O' 260 (inlet and exhaust) Valve guide protrusion above spring seats Inlet valve depth below head face Mk 3: 0·050 in. Mk 4: 0·050 in. Exhaust valve depth below head face. Mk 3: 0·025 in. above Mk 4: 0·050 in. Valve spring free length 1·48 in.
  • Page 26 GENERAL DESCRIPTION The engine is a four cylinder, 'in line', overhead valve unit operating on the four stroke cycle with direct flow cylinder head and bowl-in-piston combustion chambers. The cylinder bores are machined directly in the cast iron cylinder block which is cast integral with the upper half of the crankcase and are provided with full length water jacketing.
  • Page 27 are marked, this is normally done, in production, by a number 2 stamped on the front inter- mediate cap and 4 on the rear intermediate cap. The rear cap is not marked. All caps must be fitted with the cast arrows pointing forwards. The crankshaft bearing liner parent bore in the cylinder block may be either standard or 0'015 in.
  • Page 28 The valve seats may be re-faced with a cutter tool with an included angle of 90° and the pilot diameter of the cutter should be 0·310 in. (7·87 mm.). INLET MANIFOLD The inlet manifold is of cast aluminium and has separate ports for each cylinder. A tap- ped hole is incorporated in the air cleaner mounting flange for the engine ventilation system vacuum connection.
  • Page 29 · A7 REAR OIL SEAL CARRIER The crankshaft rear oil seal is pressed into an aluminium carrier which is bolted to the cylinder block rear face, and fitted with a composition type gasket. The oil seal runs on the periphery of the flywheel mounting figure.
  • Page 30 The camshaft front and rear bushes are both approximately! in. (19·1 mm.) wide, the front one having an additional oil hole for the rocker shaft oil feed, and the centre bush approxi- mately tin. (15·9 mm.) wide. Fit the bushes using a replacer detail '-3b' in addition to the adaptors previously used.
  • Page 31 The centre main bearing journal has a double radius of 0'070 in. (1'78 mm.) and 0·080 in. (2'03 mm.) and the rear main bearing has a double fillet radius. the inner radius of which must.be maintained at 0·100 to 0'110 in. (2'54 to 2·79 mm.) when regrinding. The remain- ing main journal fillet radii are 0·080 to 0·094 in.
  • Page 32 The connecting rod small end bearing is a steel-backed bronze bush, which is not available in service, the connecting rod being serviced with the bush already fitted. When dismantling an engine examine the piston markings to check the connecting rods for straightness.
  • Page 33 Oversize pistons and rings are not available and replacement cylinder liners should be fitted. Pistons graded to cylinder bore size are fitted to new engines. One grade only is supplied for spares. FL VWHEEL AND RING GEAR The cast iron flywheel is located concentrically on the crankshaft flange and retained by six bolts fitted with washers and Loctite.
  • Page 34 THE OIL FILTER The full flow type oil filter is screwed to a mounting flange integral with the oil pump body and is of the disposable cartridge type. VENTILATION SYSTEM A semi-closed positive ventilation system is fitted as standard and consists of a breather and oil separator and a connecting tube to the inlet manifold.
  • Page 35 MAINTENANCE AND REPAIR Section A TOP ENGINE OVERHAUL - DECARBONISE CYLINDER HEAD AND REGRIND VALVES Op. No. Disconnect battery. Shut off fuel supply. Turn off seacock. Drain cooling system. Drain taps are located on port side of cylinder block and underside of heat exchanger. Disconnect sea water outlet hose on top of sea water pump.
  • Page 36 Check valve rocker oil feed hole is clear of obstruction. hole is located at No. 1 rocker pillar base. Clean tops of pistons of carbon and remove all traces of old cylinder head gasket from top of cylinder block. Thoroughly clean out exhaust manifold. Check injector sprays and pressure setting.
  • Page 37 A15 ' THROTTLE LEVER VENT SCREW FUEL INJECTION PUMP VENTING AND TIMING DETAIL Tighten the bolts as shown in Fig. 1. This should preferably done with the engine hot, using a Torque wrench and repeating the sequence in stages until the correct torque figure of 65/70 Ib./ft.
  • Page 38 To replace ball race on driven sprocket. drive off old race with a drift and press on re- placement ensuring that ball race is properly seated against shoulder. To replace needle roller inner race use tool No. S2350 and draw off race and press on replacement flush with end of sprocket hub.
  • Page 39 CHAINCASE COVER NEEDLE ROLLER OUTER RACE FLUSH WITH BOSS FACE SECTION OF CHAIN CASE COVER FITTING JOINING LINK TO FUEL PUMP DRIVE CHAIN /" .~:!!!:;.
  • Page 40 TO SERVICE FUEL INJECTOR PUMP DRIVE CHAIN ONLY Op. Nos C1-C6 and C16-C17. Replace chain if wear greater than -002 in. per link. TO SERVICE FRESH WATER PUMP Op. No. Carry out operations C2-C5. Withdraw fresh water pump pulley flange from pump shaft, after removing drive pin when fitted.
  • Page 41 Carefully align the pivot pin hole of yoke with pivot pin hole in end bracket by mov- ing solenoid assembly and fit pin (with head uppermost when installed on engine). Note: A new pin MUST be used after dismantling a starter. Fit the two bolts retaining the solenoid ensuring that the rubber sealing diaphragm is properly seated in the recess and fully tighten bolts.
  • Page 42 DIESEL ENGINE FAULT FINDING CHART MECHANICAL FUEL ENGINE ~------~------------------~ OVERHEATS ________________ Faulty injector(s) Insufficient water; Insufficient lubricating oil: Fan belt slack or broken; Thermostat sticking: Injection timing incorrect; Water pump needs attention; Engine needs top overhaul. ENGINE __________________ KNOCK~ _r----~~------------------~ Bearings worn;...
  • Page 43 A19 . TO SERVICE SEA WATER PUMP Op. No. Shut off seacock. Remove hoses. from pump. Remove two tin. AF bolts and withdraw pump and drive coupling. Remove pump cover plate. Pull out shaft with impellor and remove cam if worn. Replace seals and refit shaft and replacement impellor and cam.
  • Page 44 Remove gearbox if fitted and flywheel housing (6X1' in. AF bolts). Remove flywheel and stubshaft (1' in. AF nuts) or flywheel inertia weight (6Xt in. AF bolts) and drive plate if hydraulic gearbox is fitted. Invert engine and remove sixteen in.
  • Page 45 OTHER OVERHAUL CONTENTS SECTION PAGE MARINE ENGINE ELECTRICAL SYSTEM •••••••••••••••••• Q Activation by Fuel Pressure •••••••••••••••••••••••••• Q.2 Activation by Lube Oil Pressure •••••••••••••••••••••• Q.4 COOLING SYSTEM (EXTERNAL) •••••••••••••••••••••••• R TRA.NSMI SS IONS •.••••••••.••.•••••••••••••••••••••• Type SAl t1a.nual........Type SAO Ma.nual......• ..S. 9 SAl and SAO Clutch Adjustments •••••••••••••••••••••••...
  • Page 46 MARINE ENGINE ELECTRICAL SYSTEM ACTIVATION BY FUEL PRESSURE (Push Button Start) This system is supplied on all four and six cylinder Westerbeke engines beginning January 1975. Basically, the system is very simple and eliminates the need for a separate switch position to activate the engine alarm system, when supplied.
  • Page 47 SECTION Q ACTIVATION BY FUEL PRESSURE (PUSH BUTTON START) WIRING I N:)[RT rOil L-~_~R!"~!!.o.!OIl. INSTRUMENT P ... NEL ",S$E .. eLY NOT u . . I •• _ _ _ r------------~ -lsI:ENon-A ~WTG _____ )T"'RTtR __ _ DRWG 19201 DEC 75 •...
  • Page 48 Marine Engine Electrical System ACTIVATION BY LUBE OIL PRESSURE (Keyswitch Start) This system is supplied on all 4 and 6 cylinder Westerbeke diesels produced prior to January 1975. Operation is very simple. Putting the start switch in the Run posi- tion energizes an alarm system (when sup- plied).
  • Page 49 SECTION R COOLING SYSTEM (EXTERNAL) DESCRIPTION the fresh water. The fresh water flows The Four Marine Diesel Engines are from the expansion tank to the heat ex- equipped with a fresh water cooling system. changer; here it is cooled and discharged Transfer of heat from the fresh water into the lower part of the cylinder block, (closed system) circuit to the sea (raw)
  • Page 50 7. IMPELLER REPLACEMENT water via the heat exchanger. This raw water is picked up from the sea by a power- a. Remove front end cover and gasket. ful neoprene impeller sea water pump, and b. Remove impeller. passes through the oil cooler to the heat c.
  • Page 51 SECTION S L25 TRANSMISSION ADJUSTMENT OF GEAR MANUAL MARINE REVERSE GEAR First remove Inspection Cover of Gear Box. AHEAD CLUTCH (Ref: Plate "M") Rotate the drum M4 until the locking tab M20 is observed. This tab locks the aft part of drum to the forward part and engages in castellations cut in the forward portion.
  • Page 52 Check the adjustments of both AHEAD and REVERSE to see that these are correct. Check for worn or unevenly adjusted Toggles and Toggle Links. These may have been replaced at some time and were not correctly adjusted to produce even pressure on the clutch plates through the plungers.
  • Page 53 GEARBOX AND REDUCTION GEAR Plate Description Plate Description Ory. Oly. Gearbox S.L. nut for clam~ bolt Transax pin secur ng lever Joint. support flange to gearbox Cross shaft seal Reduction gear housln~ Cover. reduction gear ouslng Dip-stick. gearbox 011 level Joint.
  • Page 54 PLATE 'M' CLUTCH Plate Description Qty. Plunger only Gear, forward stub shaft Pilot bush for gear Split pin Cone key for gear Drum Operating collar assembly Drum bush Control shoe Split cone Fork lever Forward push plate Transax pin, pair Stud, long pinion Cross shaft Stud, short pinion...
  • Page 55 M52 into the splined plates, finally screwing home the Drum completely dismantle the reverse gear, it is better to slack off Arm Plate M19 When replacing the coupling L25 before fitting the nut L27 which secures the coupling BEFORE commenc- the key to the shaft slide the '0' ring up to the bearing.
  • Page 56 It is sometimes necessary to fit an extra joint between the faces of the housing and the cover to give perfect freeness. When replacing the coupling L25 before fitting the key to the shaft slide '0' up to the bearing having first checked there are no cuts in the ring.
  • Page 57 SECTION V SERVICE BULLETINS The following Bulletins contain supplementary and up- dated information about various components service pro- cedures which are important to the proper functioning of your engine and its support systems. You should familiarize yourself with the subjects and make sure that you consult the appropriate Bulletin(s) whenever your engine requires service or overhaul.
  • Page 58 The goal is to prevent excessive exhaust temperatures with the least amount of sea water. PN 19149 May 6. 1974 J H. WESTERBEKE CORP.· AVON INDUSTRIAL PARK· AVON. MASS. 02322 U.S.A.· TELEPHONE: 6i7 588·7700· TELEX: 92-4444· CABLE: WESTCORP.
  • Page 59 We presume basic understanding of good marine practice on the part of the installer. J H WESTERBEKE CORP.· AVON INDUSTRIAL PARK· AVON. MASS 02322 U.S A . TELEPHONE: 617588·7700· TELEX 92·4444· CABLE. WESTCORP. Page 1/2...
  • Page 60 HYDRO -HUSH BELOW ENGI NE . AIR VENT . • " PH,llI7"1 HYDRO-HU~H ..AIR VENT " / --- . / ,/ \, /"..\,~r~~· .&.----1I1v-;/-~ :-~A =-=~~=-=./: " ..L:Jlc·· .."." " <4--~- I I . "...
  • Page 61 V.D.C. Performer-Six, 115 Horsepower, diesel 200 minimum The ampere hour range shown is minimum. There is no real maximum. TELEP~ONE H WESTERBEKE CORp· AVON INDUSTRIAL PARK· AVON. MASS 02322 USA . 617588·7700· TELEX 92·4444· CABLE WESTCORP 20442 5/7/75 Page 1/1...
  • Page 62 Don't forget to drain to normal level before next start. J H. WESTERBEKE CORP . AVON INDUSTRIAL PARK· AVON. MASS 02322 U. SA· TELEPHONE 617 588·7700· TELEX 92·4444· CABLE WESTCORP PN 20629 7/16/75 rev'd 11/22/77...
  • Page 63 SERVICE BULLETIN #83 con't INSTALLATION ANGLE The installation angle must not exceed 18 to the horizontal. ROTATION This transmission turns a RIGHT HAND propeller on the above engine models. OPERATING TEMPERATURE This transmission is air cooled and proper ventilation of the engine compartment is required.
  • Page 64 This unit is sealed for maximum life and is not repairable. Continued-Reverse Side J H WESTERBEKE CORp· AVON INDUSTRIAL PARK· AVON, MASS. 02322 U.S.A.' TELEPHONE: 617588·7700, TELEX 92·4444· CABLE: WESTCORP. PN 20701 9/75 Page 1/1...
  • Page 65 BY-PASSING SPLITTER: In the event of failure, batteries may be charged directly from alternator by connecting either splitter terminal #1 or #2 to terminal A, bypassing the splitter itself. This should not be done simultaneously for both batteries unless they are, and will remain at, the same voltaQe (state of charge).
  • Page 66 Overleaf 1s a parts list and an illustration showing the proper installation of the fuel pressure switch used on most of our 'engine products. PIN 21564 . 9/9/76 H. WESTERBEKE CORP .. AVON INDUSTRIAL PARK· AVON, MASS. 02322 U.S.A.· TELEPHONE: 617 588·7700· TELEX: 92-4444· CABLE: WESTCORP.
  • Page 67 RII'llt; O.D • 19185" ADAPTER COPP£~ 1926/ iAlIISHE, SC~eW 192.04 Ass'", (8/.£'£D. 'TENlpAlC'r NO·1 DESCI</pTION ~.:=.IJ· H. WESTERBEKE CO AVON. 02122 .. c ..".ACTIO .. AL /'\..- ,,".ULA" 21743 D;:~_7tOr·"····"u"", r,,-, ." •• tI. •••• u .•.• , :-.:::=-~ ~·A::::_...
  • Page 69 PARTSLIST CONTENTS WESTERBEKE L25: BL0CK WESTERBEKE L25: HEAD - MANIFOLDS WESTERBEKE L25: PUMPS - COVERS - ALTERNATOR WESTERBEKE L25: FUEL SYSTEM WESTERBEKE L25: BACK END - STARTER WESTERBEKE L25: ELECTRICAL SYSTEM TYPE MANUAL EXTERNAL - REDUCTION TRANS~ISSION: TYPE MANUAL TRANSMISSION: INTERNAL - CLUTCH SUPERCEnF.D PARTS USED PRIOR TO SN 5375...
  • Page 70 WEST£RBEK£ L25:...
  • Page 71 WESTERBEKE L251 BI.OCK REMARKS NAME CYI.!NDER-BARE BI.OCK 21224 CORE PI.UG 21225 DIPSTICK BORE PI.UG 21226 CORE PI.UG 21227 OIL PICK-UP PIPE 21228 SUPPORT OIL SEAl. 21229 OIL SEAl. SUPPORT BOLT 212321 OIL SEAl. SUPPORT GASKET 21231 SEAl. 21232 PUMP 21233...
  • Page 72 BL.OCK...
  • Page 73 BLOCK WESTERBEKE L251 QUAN REMARKS NAME ~rF' ;q.4 21287 SUMP REAR SEAL 21288 SUMP SCREw 21289 GASKET SUMP-ONE PAIR 212921 SUMP PLUG ADAPTER 21291 SUMP PLUG ELBOW 21292 OIPSTICK 21293 DIPSTICK TUBE 21294 DIPSTICK TUBE BRACKET 21295 DIPSTICK EXTENSION TUBE...
  • Page 74 WESTERBEKE L25. HEAD - HANlrOLDS...
  • Page 75 WESTERREKE L251 HEAD - MANIFOLDS QUAN REMARKS CYLINDER HEAD 212188 CYLINDER HEAD ROLT 21089 CYLINDER HEAD GASKET 2j2J9~ EXHAUST rLANGE 21396 INLET VALVE 212191 EXHAUST VALVE 212192 SPRING VALVE 21093 VALVE SPRING RETAINER 21094 VALVE SPRING SPLITCONE 212195 OIL-VALVE STEM SEAL 212196 CYLINDER HEAD AFT...
  • Page 76 WESTERBEKE L25: HE.O - MANIfOLDS...
  • Page 77 WESTERBEKE L251 HEAD • MANIfOLDS QUAN NAME REMARKS ~F'r MANlfOlD-rRONT AND REAR PORTS GASKET EX~AUST 21139 INJECTED ELROW EX~AUST.WATER 19438 52-1 INLET ELBOW EX~AUST 21141 52 .. 2 GASKET f"LANGE EX~AUST 21142 SCREW fLANGE EX~AUST 21143 LIF'TING 21144 GUIDE VALVE...
  • Page 78 WESTER8EK[ L25, PUMPS - COVERS - ALTERNATOR 1118...
  • Page 79 WESTERBEKE L25: PUMPS - COVERS • ALTERNATOR QUAN NAME REMARKS CHAIN CASE 21158 BRACKET TO CHAIN CASE BOLT 211621 SCREW 21161 SPROCKET PUMP DRIVE 21162 RALL RACE 21163 BALL RACE RETAINER 21164 NEEDLE ROLLER BEARING 21165 ALTERNATOR 21386 INNER RACE...
  • Page 80 W£ST£RBEKE L25; PUMPS - COVERS ALTERNATOR...
  • Page 81 WESTERBEKE L25: PUMPS - COVERS - ALTERNATOR QUAN NAME REMARKS pr-,! ~r:- SEA WATER PUMP OUTLET HOSE 21236 CLAMP HOSE-SEA WATER LINE 212~7 HOSE-SEA WATER FROM PU"1P CLAMP 21206 BELT 21209 HOSE REINFORCING 9USHING 21210 LOCKWASHER 21211 LOCKWASHER 21212 ASSEMBLY·FRESH WATER PUMP...
  • Page 82 WESTERBEKE L25: FUEL SYSTEM...
  • Page 83 WESTfRBEKE FUEL SYSTEM 1..25. QUAN REMARKS NAME ~F"F" PUMP FUEL LIfT 21.313 FUEL LIFT PUMP PRIMER 21314 FUEL LIFT PUMP GASKET 21315 FUEL LIFT PUMP MOUNTING SCREW 21316 Ln"T PUMP TO FILTER LINE 21317 FUEL FILTER 21318 LIFT PUMP BRACKET 21319 ELEMENT FUEL F'ILTER...
  • Page 84 WESTERBEKE L25. FUEL SYSTEM...
  • Page 85 FUEL SYSTEM WESTERBEKE L251 QUAN NAME REMARKS WASHER 21366 BOLT 21367 LOCKWASHER 21368 SHAKEPROOF' WASHER 21369 SCREW 2137" LOCK WASHER 21371 SPLIT 21372 ANCHOR 21373 SCREW CLIP 21314 EXTENSION BOLT 21375 EXTENSION BOLT 21376 LOCKWASHER 21.377 INJECTOR NO~i!LE 21378 INJECTION PUMP...
  • Page 86 BACK END • STARTER WESTERBEI<E L25t 501i 347 ____ _...
  • Page 87 BACK END - STARTER WESTERBEKE L25' QUAN REMARKS NA~E F" STARTER MOTOR 213821 STARTER MOUNTING BOLT 21382 STARTER MOUNTING BOLT 21383 LOCKWASHER 21384 ASSEMBLY PINION 21385 STUB SHAFT STUD 21238 STUB SHAFT STUD 21239 11> SHAF'T STUB 212421 STARTER MOUNTING...
  • Page 88 WESTERBEKE L251 ELECTRICAL SYSTEM WIRING IN3f!T f'0f! L-~~!.~~!Oll. r------------""--:.--- ..., I N:'TRUMENT PANEL AS!>EMIILY I ..' I"","UsrJ SEE MOT.'" ~W.T.G. L! __ _ j"""' ' , ",-' " " ..• DRWG 19201 •...
  • Page 89 ELECTRICAL SYSTEM WESTER8EKE L25' QUAN REMARKS NAME ~rF' AMMETER 19165 HOUR METER TACHOMETER 11917 OIL PRESSURE GAUGe: 19166 WATER TEMPERATURE GAUGe: 19168 PUSHBUTTON SWITCH 11.957 ALTERNATOR 21386 SWITCH F'UEL N.O. 11383 OIL PRESSURE SENDER 19167 WATER TEMPERATURE SENDER 19169 MOTOR...
  • Page 90 TYPE MANUAL TRANSMISSION. EXTERNAL REDUCTION...
  • Page 91 TYPE MANUAL TRANSMISSION: EXTERNAL - REDUCTION QUAN REMARKS rOR TRANSMISSION HOUSING 21212~ SUPPORT rLANGE TO TRANSM HSING GASKET 212J19 CROSS SHAF'T SEAL 21421 TRANSM HSING OIL LEVEL DIPSTICK 21iU8 DRAIN-TRANSM HSING PLUG 2"'991 SET-BAND ANTI-RATTLE SCREw 21~~7 LOCK 20985 INSPECTION COVER 212J11 INSPECTION COVER TO TRANSM HSING...
  • Page 92 TYPE MANUAL TRANSMISSIONI EXTERNAL. REDUCTION...
  • Page 93 TYPE MANUAL TRANSMISSIONI EXTERNAL. REDUCTION QUAN NAME REMARKS ~rl=" SPACER fOR DRIVE SPROCKET 212'28 BALL .. AFT TOP BEARING 21~27 TRIPLE-50 LINKS 21Z1r;,S CHAIN 54-1 TRIPLE .. 46 LINKS CHAIN 210eJ6 54 ... 2 SPROCKET DRIVEN-3aT 21030 ;5-1 DRIVEN-31T SPROCKET 55-2 212'31 SHAFT...
  • Page 95 J TYPE MANUAL TRANSMISSION' INTERNAL. CLUTCH QUAN NAME REMARKS FORWARD STUB SHAFT GEAR 2UJ61 BUSHING PILOTING-FOR GEAR 21062 CONE~FOR TRANSMISSION 21063 DRUM 2UJ43 BUSHING DRUM 21044 SPLIT CONE 21054 " PUSH PLATE FORW~RO 212149 LONG PINION STUD 21.2148 SHORT PINION STUD 2Ul47 LONG-WITH BUSHING...
  • Page 97 INTERNAL • CLUTCH TVPE MANUAL TRANSMISSIONI REMARKS tlUAN NAME ~F'~ TRANSAX·rOR LINK PINS (PAIR) 21444 LINK PLATE 212'81 CROSS/LINK SPACER SHAFT 21382 SHAFT MAIN-DO 212116 ;"'-1 MAIN-REDUCTION SHAFT 21317 5&' 1 .. 2 & MAIN SHAFT TO TRANSM COUPLING 212160 MAIN SHArT GEAR 212159...
  • Page 98 ~375 SUPERCEDED PARTS USED PRIOR TO SN REMARKS QUAN NAME FORWARD (SN 172.3372) EXCHANGER 21441 FORWARD HEAT EXCHANGER (SN 172.3372) 21432 BRACKET FORWARD HEAT EXCHANGER (SN 172-3372) 21.427 OUTU::T EXHAUST (SN 172~3372) MANIF'OLD 2141i19 EXHAUST ~ANlrOLD 172~3372) 212140 EL.BOW EXHAUST MANIFOLD-45 DEGREE (SN 172-3372) REND 214"3 12/24 VOLT SYSTEM (SN...