Westerbeke M-30 Service Manual

SERVICE MANUAL M-20 + M-30 5416 + 5424 Part Number 200152 Edition 1 October 1990

• Valve timing When the valve clearance has hcp.n arl/usted as shown in Fig. 17. the standard valve timinq shown in the chart can be attaine

• Compression release (Release wire is optional parts) Assemblp thp parts as shown in Fig. 19. Pull the lever out as far as it will go. check

• Boring and replacing the cylinder liner Referriml to Fig 22. tht~ insirif~ diametPf of the linm sholiid be checked at points 1.2. and 3 ann in

Main Moving Parts • Pistons and piston rings The ['Istons and piston rings are shown in Fig. 26. If the cyl inder Imers have been bo

, 1307-·, I'!313m (43.959 -43 975mml 1 _ {, ~l 1--J! 2.050 - ) 052m 0 782 -~ O. 793m. 2.044 2.045111 (5'.921 51940mmJ (52064' 52131mm)

Main Components • Gear train Be sure to assemble thp. gears by matchinq the mating marks as shown in Fig 30. The backlash of each gear is 0.00

• Main bearing ass'y Insert the bearings in the main bearinq hnusing halves as in-dicated in Figs. 33 & 34, using the thrust wilsher

• Idler gear Secure the idler gear shaft to the engine block with 3 cap-screws. torque to 17 to 20 ft-lbs (2.4 to 2.8 kg-m) and bend tabs of

• Attaching flywheel to crankshaft Clean the entire contact suriil('P carPiully Coat the contact surface with enginp. oil, wa~h all the

• Starter specifications ------,--------------16 H.P. 24 H.P. Code No. 298783 298876 Type Solenoid ilctuilted with overruning clutch f-. Nominal 12V v

• • .. Specifications .. Fuel System . . . Lubrication System . Oi-Filter ... Combustion System Valve Timing ... Compression Release Cylinder Line

• Glow plug specifications Code No. Number Vol tilfJP & rw refl t '----16 H.P. 298795 ::> ArprOXIPlately 6.5 amp (l') 10.5 V • Glo

E Q) ..., en >-(J) -co (.) .-I-..., (.) Q) -w ENGINE CONNECTIONS __ 3 _Cl,,-L _0 _~ --,---t-,tr 2 CYl. 1-----"""----; . . - -

Reference Chart Engine Parts Specifications Standard Value Maximum Remarks Items limit -----.--Cylinder head tightness Ml0 x 125 54.2"'&qu

Items Specifications Standard Value Maximum Lomit Remarks r---.r--.--.-----------------------~.----------.----_+--------------+_----~--------------1 I

--Parts Items Specifications Standard V~lue Maximum limit Remarks Number of teeth, crank gear 34 Number of teeth, Idel gear 79 Number of teeth, cam ge

P"rts Item5 Specifications Standard Value Maximum Urn It Remarks 1---I-------------------.-+----------+--------{-----+-------------/ 0'>

Parts Spec if ications Standard Value Ma)(imum Remarks Items Limit ---Cooling system . With pressurized radiator Natural circulation (corrugated I 16

,"'-'" I Maximum Par" Items I Specifications Standard Value Remarks 1-. limit -'----------Number of teeth. pinion . Numb

Bolt material grades are shown by numbers punched on the bolt heads_ Prior to tlghtenong. be sure to check out the numbers as shown below: Punched Nu

..

MODEL SPECIFICATIONS 15 (5411) 20 (5416) 30 (5424) 40 (5432) 50 (5444) --------------------.----------------------------------------------------------

MODEL DGIN! OPlIATIJIIG TlJlPEIATUU MAX. OPERATING ANGLE ENGINE ROTATION PROPELLER ROTATION ENGI},,"! WEIGHT (Pounds) LENGTH (Overall) HEIGHT (Ov

Construction and Handling Fuel System • Fuel system The fuel systf;)m schematic is shown in Fig. 1 with the fuel flowing in the direction indic

[Jel injection pump The Injf'ction pump is the Bosch "Mine K type" It is a preci· sian riPee nf eQlJipment machined to close tolera

• Fuel injection'nozzle The fuel injection nozzle, like the fuel injection pump, is also a precision piece of equipment and should be treat

n Probable cause of low oil pressure n (1) Clearance on one of the bearings is to great. (2) One of the rocker arms is too loose. (3) Faulty pressure

--. --Lj~\ r n-:~~. .111J I ---~'~_ J j -, , __ ./_ L ___ ~ 1, Safety valve body 4. Oil filter base 2. SafetY valve spring 5. Safety valve 3. &qu