CHAPTER 7. ENGINE REPAIR INSTRUCTIONS

CHAPTER 7

ENGINE REPAIR INSTRUCTIONS

Section I. GENERAL

7-1. Description

The Continental Engine Model RS 633 is a 6-cylinder, 4-

Major components located on the engine are the

stroke/cycle,

overhead-valve, liquid-cooled gasoline

governor, carburetor, starter, oil filters, magneto,

engine, developing 142 rated horsepower at 2,200 rpm.

generator, and fuel pump.

Manufacturer's tabulated data on the engine will be found

in chapter I, section II.

Section II. CARBURETOR

Remove all deposits from the

7-2. General

throttle bore and idle port.

The updraft-type carburetor, with duplex float, is of the

double-venturi design to aid in complete vaporization of

c. Inspect the float for a badly worn shaft bearing or

fuel. The power jet and accelerating pump systems are

wear on the top side of the float lever, where it contacts

operated by the engine vacuum.

the fuel valve. Shake the floats to determine if gasoline

has leaked inside.

7-3. Disassembly and Reassembly

d. Inspect the throttle plate for burrs or damaged

Disassemble the carburetor as shown in figures 7-1 and 7-

edges.

2, in sequence indicated by the key numbers.

Reassemble in the reverse sequence.

e. Inspect the choke plate for bends, burrs, or

damaged edges.

Note. Do not remove the throttle shaft bushings from the

f. Inspect the choke shaft for straightness and the

throttle body unless they are worn. See paragraph 7-4h.

bearing surfaces for wear.

Caution

g. Inspect the vacuum pump cylinder in the throttle

Do not pull, twist, or apply pressure

body for excessive wear, deep scratches, ridges, or

on the float bodies. To adjust the

scoring of the vacuum pump cylinder head. Reassemble

distance between the float bodies

the vacuum pump into the vacuum pump cylinder.

and the machined surface, apply

Inspect the clearance at the upper operating end.

pressure with long nosed pliers on

Desirable clearance is 0.001 inch. Maximum allowable

the float lever close to the float

clearance is 0.003 inch. Clearance in excess of 0.003

body.

inch will allow air or fuel to be discharged into the

manifold through the vacuum package, and result in poor

Note

performance of the idling jet, power jet, and vacuum

Adjust the float 2 1/64 inches + 1/32

pump.

inch from the bottom of the float to

h. Inspect the throttle shaft for excessive wear on

the machined surface of the cover.

the bearing surfaces.

7-4. Cleaning, Inspection, Repair

Caution

a. Clean all parts in an approved solvent; then blow

Side play of the throttle shaft in

dry with compressed air.

excess of 0.005 inch, due to worn

b. Blow out all passages in the throttle body and fuel

throttle

bowl with compressed air.

Note

7-1