Compression tester for gasoline engine

M-1

M-1

The compression tester is compact size and easy to handle. It can be used for extensive applications by fitting either the provided straight or curved stem depending on the position of a plug hole.The use of the optional system separately sold allows the use of this tester for a wider variety of vehicle types.


Meter
diameter
Max. scale Min. scale Overall
length
Accessories Case Total
weight
φ50mm 1.5MPa
(Approx.
15kgf/c㎡)
0.05MPa 130mm Straight stem
83mm
Curved stem
85mm
Metal case
W235×
D75×
H45mm
Approx.
700g

☆Optional adapter

  • Special stem:This stem can also be used with Model GU-3H shown below.
  • 18mm diameter V rubber

G-1C

G-1C

Measurement can be made by a single person since the tester can be secured in close contact with a measured object by inflating the 14mm rubber at the end of the tester by turning the adjust nut (only when used for the 14mm spark plug). In the case of a vehicle with a plug other than the 14mm spark plug, the tester can be used as a manual pressure contact type by replacing the 14mm rubber with the provided V rubber.

Meter
diameter
Max. scale Min. scale Overall
length
Accessories Case Total
weight
φ60mm 2.5MPa
(Approx.
25kgf/c㎡)
0.1MPa 220mm 14mm rubber
(spare) (2)
V rubber (1)
Metal case
W235×
D75×
H45mm
Approx.
800g

☆Optional adapter

  • 18mm diameter V rubber

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GU-2C

GU-2C

Measurement can be made by a single person since this tester can be secured in close contact with a measured object by inflating the 14mm rubber at the end of the stem by turning theadjust nut (only when used for the 14mm spark plug). Since the stem can be easily attached and detached by means of the adjust nut, the tester can be used with various vehicle types by fitting either the long stem or short stem depending on the position of a plug hole. In the case of a vehicle with a plug other than the 14mm spark plug, the tester can be used as a manual pressure contact type by replacing the 14mm rubber with the provided V rubber.

Meter
diameter
Max. scale Min. scale Overall
length
Accessories Case Total
weight
φ60mm 2.5MPa
(Approx.
25kgf/c㎡)
0.1MPa 970mm Long stem
220mm
Short stem
99㎜
14mm rubber
(Spare) (2)
V rubber (2)
Metal case
W290×
D165×
H70mm
Approx.
2,100g

☆Optional adapter

  • ・Special stem 150mm、200mm、250mm、300mm、400mm、500mm
  • ・18mm diameter V rubber

GU-3H

GU-3H

The attached hose allows convenience in setting the compression tester.The tester can be used for extensive applications by fitting any of the three provided stems (long, short or curved stem) depending on the position of a plug hole.The use of the optional system separately sold allows the use of this tester for a wider variety of vehicle types.


Meter
diameter
Max. scale Min. scale Overall
length
Accessories Case Total
weight
φ75mm 2.5MPa
(Approx.
25kgf/c㎡)
0.1MPa 970mm Long stem
140mm
Short stem
83㎜
Curved stem
85mm
V rubber (2)
Metal case
W290×
D165×
H70mm
Approx.
1,850g

☆Optional adapter

  • ・Special stem
  •   Straight stem 200mm、300mm、400mm、500mm
  •   Curved stem 200mm、300mm、400mm、500mm
  • ・18mm diameter V rubber

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GU-53C

GU-53C

Measurement can be made by a single person since this compression tester can be secured by screwing the hose adapter into the spark plug hole. Screwing of the hose adapter into the spark plug hole can be performed just by hand requiring no tool. The hose adapter can be connected to and disconnected from the tester main body by means of a coupler quickly and easily. The long hose adapter as long as 400mm allows easy connection even to a deeply set spark plug like the DOHC.
With three types (10mm,12mm,14mm) of hose adapters provided, this tester can be used with most of reciprocating engines from a two-wheeled vehicle to a four-wheeled car.

GU-51C

GU-51C

This tester is an equivalent of GU-53C shown on the left and provided with only one hose adapter for the 14mm spark plug often used for four-wheeled cars.
※Purchase a hose adapter separately sold according to need.

Specifications

Model Meter
diameter
Max. scale Min. scale Overall length
of tester body
Provided adapter
(Overall length)
Accessories Case Total
weight
GU-53C φ60mm 2.5MPa
(Approx.25kgf/c㎡)
0.1MPa 170mm For 10mm plug(400mm)
For 12mm plug(400mm)
For 14mm plug(400mm)
Spare
O-ring for 10、12、and 14mm
(one for each)
Metal case
W290×
D165×
H70mm
Approx.
1,850g
GU-51C For 14mm plug(400mm) Spare
O-ring for 14mm (1)
Approx.
1,500g

☆Optional adapter

  • For 18mm spark plug / For 8mm spark plug
  • For 14mm taper-seal type spark plug (Ford)
  • [For a special adapter for special spark plug etc., contact us for detailed information.]

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GU-6

GU-6

Many of natural gas fueled cars like CNG cars are subjected to higher compression pressure compared with gasoline cars.This compression tester allows the measurement of higher compression pressure for these vehicles.To enhance the heat resistance required for the measurement of higher compression pressure, heat dissipation performance is improved by the use of heat-dissipating materials and shape on the end part.
Measurement can be made by a single person since this tester can be secured by screwing the hose adapter into the spark plug hole.This tester can be used for various types of plugs by fitting any of the three types (10mm, 12mm, 14mm) of the provided plug adapters.

Specifications

Model Meter diameter Max. scale Min. scale Overall length of tester body Provided adapter (Overall length) Case Total weight
GU-6 φ60mm 4MPa
(Approx.40kgf/c㎡)
0.1MPa 370mm For 10mm plug (65mm)
For 12mm plug (65mm)
For 14mm plug (65mm)
Metal case
W290×D165×H70mm
Approx.1,500g

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