Operating instructions

ManualsBrandsWesterbeke ManualsAutomotive5.0 KW BCG 50Hz

ENGINE

ADJUSTMENTS

NOTE:

WESTERBEKE

recommends

that

the

following

engine

adjustments be performed

by

a competent

engine

mechanic.

The

information below

is

provided

to

assist

the

mechanic.

VALVE

CLEARANCE

ADJUSTMENT

NOTE:

Retorque

the

cylinder head bolts before adjusting

the

engine's valves

(see

TORQUING

THE

CYLINDER

HEAD

BOLTS).

1.

Remove

the

rocker cover

and

gasket.

2. Rotate the crankshaft

in

the normal direction of rotation,

placing

the

No.1 piston at the

top

of

its

compression

stroke

with

the exhaust and intake valves completely

closed. Adjust the intake and exhaust valves

for

No.1

cylinder,

the

exhaust valve for No.2 cylinder,

and

the

intake valve for No.3 cylinder (see chart).

3. Rotate the crankshaft 180

0

in

its

nOlmal

direction of

rotation. Locate

the

piston

in

No.1 cylinder at

the

top

of

its exhaust stroke. Adjust the intake valve for

No.2

cylinder

and

the

exhaust valve for No.3 cylinder (see

chart).

CYLINDER

#

CRANK

ANGLE

1 2 3

When

No.

1

piston

is

set

at

top

of

IN

•

I

•

compression

stroke

• •

EX

When

No.

1

piston

is

positioned

at

top

of

exhaust

stroke

IN

•

EX

•

4

•.

Replace the rocker cover along with a new rocker cover

gasket..

Rocker

cover

torque:

2.9-5.1

(b-n

(4

• 7

Nm)

VALVE

CLEARANCE

Valve

Clearance:

Inlake

O.20mm

(.008

inches)

Exhaust

0.30mm

(.0:12

inches)

IGNITION

TIMING

1.

Attach a timing light

to

the

#1

spark plug

and

mark

the

front timing pointer

to

indicate

15°.

Locate

the

timing

mark

on

the

crankshaft pulley

and

mark it

with

white

chalk

or

a

crayon.

2. Start

the

engine

and

warm

it

up

to

its

normal

operating

temperature. Make sure the generator

is

operating without

a load on

it.

3. Using

the

timing light, align

the

timing

mark

in

the

front

crankshaft

puI1ey

so

it

is

just slightly before the

first

tim-

ing

pointer.

Do

this

by

loosening

and

slowly rotating

the

distributor

body.

Use

the following timing specifications:

Timing

Specifications:

15"

±

.5

0

BTDe

at

1800

rpm

(no

load

on

generator)

,

IGNITION

TIMING

TORQUING

THE

CYLINDER

HEAD

BOLTS

After

the

initial break-in peliod (approximately

50

hours),

the

cylinder

head

bolts

should be re-torqued.

Tighten

the

cylind~r

head

bolts

according

to

the

sequence

shown.

Make sure

the

engine

is

cold

when

this

is

done,

and

loosen one head bolt one-half

turn

and

then

tighten

it

between

43

51lb-ft

(60

70

Nm).

Then

proceed

to

the

next

head

bolt

in

the

sequence. Tighten

the

RS

(rocker cover

stud)

securely.

FRONTO~

ENGINE

~

6

4

2

Engines & Generators

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