Specifications

35
2
11. When test is complete, close air valve.
Then, pull out knob and turn
counterclockwise as far as it will go to
release pressure in combustion chamber.
12. Disconnect outlet hose from tester before
removing from spark plug hole.
Possible Causes for Poor Compression:
• Loose cylinder head bolts
• Blown head gasket
• Burned valves, valve seats and/or loose
valve seats
• Insufficient tappet clearance
• Warped cylinder head
• Warped valve stems
• Worn bore and/or rings
• Broken connecting rods
ELECTRICAL TEST EQUIPMENT
Digital Multimeters & Settings
A digital multimeter is required to perform
electrical tests. Briggs & Stratton offers
multimeter (#19581) from your dealer source of
supply. The multimeter you use must withstand
DC input of 10 - 20 amps for up to 30 seconds and
should be equipped with two fuses to prevent
damage to the meter if the input limits are
exceeded. Refer to the operators manual that
applies to your meter for the procedure to check
the fuses and general operation.
The digital multimeter is used for numerous tests
which include the following:
Fig. 5
Fig. 6
Fig. 7
Fig. 8
0 10 20 30
O F F
C O M
V Ω 1 0 A
FUS ED
Ω
V ∼
300 mV
V
A
A ~
AC Volts
Insert the BLACK test lead
into the COM receptacle
of the multimeter. Insert the
RED test lead into the VΩ
receptacle. Set the rotary
switch to V~.
0
10
20
30
OFF
COM
VΩ
10A
FUSED
Ω
V ∼
30 0m V
V
A
A ~
DC Volts
Insert the BLACK test lead
into the COM receptacle of
the multimeter. Insert the
RED test lead into the VΩ
receptacle.Set the rotary
switch to V===.
0 10 20 30
OF F
COM
V Ω
10A
FUSED
Ω
V ∼
30 0 mV
V
A
A ~
DC Amps over 10 Amps
Use with DC Shunt. Insert
the BLACK test lead into the
COM receptacle of the
multimeter. Insert the RED
test lead into the VΩ
receptacle. Set the rotary
switch to 300mV.
0 10 20 30
OF F
COM
V Ω
10A
FUS ED
Ω
V ∼
30 0m V
V
A
A ~
Ohms or Continuity
Insert the BLACK test lead
into the COM receptacle of
the multimeter. Insert the
RED test lead into the VΩ
receptacle. Set the rotary
switch to Ω.