Westerbeke W-70GA Installationshandbuch PDF herunterladen (Seite 36)

ENGINE

ADJUSTMENTS

NOTE:

WESTERBEKE recommends that the following engine

adjustments be peiformed by a competent engine mechanic.

The infonnation 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).

Remove the rocker cover and

gaske~.

2. Position the No.1 piston at Top Dead Center

(IDC)

its

compression stroke and adjust the

and #3 exhaust

No.1 and No.2 valves on the intake side

the cylinder

head and the No.1 and No.3 on the exhaust side. Rotate

the crankshaft

360° in a clockwise direction and adjust

the remaining four valves.

INTAKE

EXHAUST

3. Replace the rocker cover and the rocker cover gasket..

Rocker cover torque: 2.9-S.1Ih-ft (0.4-0.7 kg-m)

4. Adjust all values to 0.012 (0.30mm) with the engine hot.

~'.D121'."mm)

IGNITION

TIMING

Attach a timing light

the

spark plug and mark the

front crankshaft timing

groove and the timing mark

the

scale embossed on the engine's front cover.

Each timing mark represents

2°.

CRANKSHAFT'

PULLEY

2. Start the engine and warm the engine to its nonnal

operating temperature.

Using the timing light, align the timing groove in the front

crankshaft pulley with the proper timing mark

the igni-

tion timing scale embossed on the engine's front cover.

tillS

by loosening and slowly rotating the distributor

body. Refer to the timing specifications:

TIMING

SPECIFICATIONS

0°

TOC

625

RPM

ELECTRIC

CHOKE

The electric choke uses a 12 volt heating element which

opens the choke automatically when the engine starts.

The choke

adjusted with the engine off and cooled. Adjust

the choke by loosening the three cover-securing screws and

rotating the cover clockwise to

LEAN

the choke and

counterclockwise to

RICH

the choke. The .choke

initially

set at the factory for an average

700P

(21°C) room

temperature. The choke may need readjustment at engine

commissioning for the ambient temperature of the area the

engine

operating in. The choke reference mark is located

on the underside

the choke cover.

SEE

CARBURETOR

Engines & Generators

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 63 64

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