Zenoah G231PUM User Manual

11
2) SPECIFICATIONS & TECHNICAL DATA
Items unit G231PUM G231PUH G260PU G260PUM G260PUH G290PUM
Type — Water Cooled Air Cooled Air Cooled Water Cooled Air Cooled Water Cooled
Bore x Stroke mm 32x28 ← 34x28 ←←36x28
Displacement cm
3
22.5 ← 25.4 ←←28.5
Effective
— 8.4 ←←←←9.9
Compression Ratio
Type (Walbro) WT-644 WT-643 WT-645 WT-644 WT-643 WT-644
Carburetor
Venturi (mm) ø12.7 ←←←←←
Air Cleaner — Dry Type — — Dry Type —
Hand flipping
Starting — Recoil Starter ← or Recoil Starter ←←
Electric Motor
Type CDI ←←←←←
Ignition
BTDC°/rpm 30/7000 ← 28/7000 30/7000 ←←
STD RZ7C ←←←←←
Spark Plug
Option CMR6H/7H — — CMR6H/7H — CMR6H/7H
1800
Idle Speed rpm 3500 3000 3500 3000 3500
APC 18x8
Max. Power kW/rpm 2.09/12000 1.58/13000 1.62/12000 2.16/12000 1.71/13000 —
Max. Torque N·m/rpm 1.79/10000 1.34/9000 1.48/9000 1.91/9500 1.42/9500 —
Fuel Consumption g/kW·H 720 700 790 710 760 —
Weight kg 1.55 1.78 (✽ 1.58) 1.69 (✽ 1.52) 1.54 1.77 (✽ 1.57) 1.59
(✽): Without Muffler Specifications are subject to change without notice.
3) MAINTENANCE SPECIFICATIONS
G231PUM/PUH G260PU/PUM/PUH G290PUM
Items Standard Limit Standard Limit Standard Limit Measuring Device Remarks
Bore (mm) ø32
Plating damaged ø34 Plating damaged ø36 Plating damaged Eye Checking
Diameter (mm) ø31.97 ø31.87 ø33.97 ø33.87 ø35.97 ø35.87 Micro Meter
Piston Ring
1.01 1.11 1.01 1.11 1.01 1.11
Thickness Gauge
Groove width (mm)
Piston Pin Hole (mm) ø8.01 ø8.05 ø8.01 ø8.05 ø8.01 ø8.05 Cylinder Gauge
Clearance between
Piston and
0.03~0.06 0.15 0.03~0.06 0.15 0.03~0.06 0.15
Cylinder (mm)
Clearance between
Groove and
0.02~0.04 0.1 0.02~0.04 0.1 0.02~0.04 0.1 Thickness Gauge
Piston Ring (mm)
End Gap (mm)
0.05~0.25
0.5 0.05~0.25 0.5 0.05~0.25 0.5 Thickness Gauge
Width (mm) 0.98 0.93 0.98 0.93 0.98 0.93 Micro Meter
Piston Pin Diameter (mm) ø8 ø7.98 ø8 ø7.98 ø8 ø7.98 Micro Meter
Connecting Rod Small end (mm) ø11 ø11.05 ø11 ø11.05 ø11 ø11.05 Cylinder Gauge
Crankshaft Dia. at Main Bearing (mm) ø12 ø11.98 ø12 ø11.98 ø12 ø11.98 Micro Meter
Eccentricity (mm) — 0.07 — 0.07 — 0.07 Dial Gauge
Axial Play (mm) — 0.5 — 0.5 — 0.5
Thickness Gauge
Gritty or Gritty or Gritty or
Main Bearing — — — —
Feels Flat Spot Feels Flat Spot Feels Flat Spot
At the skirt end
and the right angle
to the piston pin.
When inserted
in a new
cylinder.
Piston
Cylinder
Piston
Ring
Micro Meter
Cylinder Gauge

Zenoah G231PUM Specifications

General

Brand	Zenoah
Model	G231PUM
Category	Engine
Language	English