Operator`s manual

ManualsBrandsBoss Manualsaudio & home theatreRIOT RT745

4-24.

MAGNETOS

(Four

Cylinder

Engines).

See

figure

4-1.

Assemble

a Woodruff

key

(9)

in

the

shaft

of

the

conventional

or retard

breaker

magneto.

Assemble

the

magneto

gear

(5)

on

the drive

shaft,

install

the

washer

(4) and

nut

(3).

Tighten

to

specified

torque

and

se-

cure

with

cotter

pin

(2).

4-25.

MAGNETOS

(SixCylinderEngines).

See

figure

4-1.

Assemble

a Woodruff

key

(9)

in the

drive

shaft

of

the

conventional

or

retard

breaker

magneto

and

assem-

ble

the

drive

coupling

(13)

over

the

key.

On all

magnetos

assemblethe

Woodruff

key

(9)

and bushing

(10)onshaft,

install

nut

(3),

tighten

to

specified

torque

and

secure

with

cotter

pin

(2).

4-26.

MAGNETOS

(Eight

Cylinder

Engines).

As

the

magneto

drive

plate

was

not

removed

at disassembly

no reassembly

is required.

INSTALLATION

4-27.

MAGNETOS

(Four

Cylinder

Engines).

See

figure

4-1.

Assemble

a gasket

(1)

on

magneto

mountingpads,

note

that

when

the

magneto

is of

the

impulse

coupling

type

an

additional

gasket

(6)

and

adapter

(7) are

re-

quired.

4-28.

MAGNETOS

(Six

Cylinder

Engines).

See

figure

OVERHAUL

MANUAL-

LYCOMING

DIRECT

DRIVE

AIRCRAFT

ENGINES

Section 4

Ignition

System

4-1.

Assemble

a gasket

(1),

adapter

(7)

and

gasket

(6)

on

the

magneto

mounting

pads.

Assemble

the

ball

bear-

ing (12)

onthe

magneto

gear

and

retainer

(5) and

install

the

assemblies

engaging

the marked

tooth

of

the

mag-

neto

gear

(See

figure

4-3)

between

the

two

marked

teethon

the

crankshaft

idler

gear

(See

figure

4-4).

In-

stall

the

drive

cushions

(11)

in

the

retainer.

NOTE

The

magneto

gear

and

retainer

assem-

blies

on

engines

employing

two

impulse

coupling

magnetos

and

TIO-540

engines

use

a different

assembly

on

the

left

and

right

side.

Consult

parts

catalog

for

cor-

rect

part

number.

4-29.

MAGNETOS

(EightCylinder

Engines).

Seefigure

4-1.

Assemble

a gasket

(1),

adapter

(7)

and gasket

(6)

onthe

magneto

mounting

pads.

Assemble

and

centering

plate

(16)

into

the

retainer

(15)and

assemble

the

drive

cushions

(11)

around

the centering

plate.

Install

the

magneto

gear

(5)

and

the

above

assemble

meshing

the

magneto

gear

and the

crankshaft

idler

gears

as des-

cribed

for

the

six

cylinder

engines.

4-30.

TIMINGMAGNETOTO

ENGINE.

(Four,

six

and

eight

cylinder

engines).

Rotate

the crankshaft

in

dir-

ectionof

normal

rotationuntil

No.

1 cylinder

is onthe

compression

stroke

and approximately

35

°

BTC.Clamp

the

ignition

timing

pointer

on

the advance

timing

mark

on

the rear

of

the

starter

ring

gear.

The

starter

ring

gear

may

be marked

at 20

°

and

25

°

. Consult

engine

nameplate

for

correct

advance

timing

mark

to use.

Continue

rotating

the crankshaft

until the

timing

point-

er and

the parting

flange

of

the crankcase

align. Leave

the

crankshaft

in

this position

until

the magneto

is

in-

stalled.

Figure

4-7.

Ignition

Wiring

Diagram

Four

Cylinder

Engines

REASSEMBLY

4-23.

MAGNETOS

(All

Engines).

Before

assembling

the

magneto

gear

or

drive

coupling

(whichever

is ap-

plicable)

tothe

magneto

drive

shaft,

apply

a

light

coat-

ing

of Go-Jo-No-Lox

compound

or

equivalent

to

the

tapered

section

of

the magneto

drive

shaft.

See

figure

4-2.

This

compound

is

manufactured

by

Gojer,

Inc.

Akron

9,

Ohio.

After

assembling

gear

or

coupling,

wipe

excess

compound

from

the

drive

shaft.

Figure

4-8.

Ignition

Wiring

Diagram

Four

Cylinder

Engines

-

Optional

Revised

October

1974

4-5