a1 size 841×594 eng gx25/gx35 - visman covisman-co.com/other/service/service_pdf/component layout...

© Honda Motor Co., Ltd. Power Product Service Division.

GX25/GX35A1 SIZE 841×594 ENG

LIQUID GASKET

6.4 N‧m(0.65 kgf‧m,4.1lbf‧ft)

3.4 N‧m(0.3 kgf‧m,2.5lbf‧ft)

15 N‧m(1.55 kgf‧m,17lbf‧ft)

22.6 N‧m(2.3 kgf‧m,16.7lbf‧ft) GX-3514.7 N‧m(1.49 kgf‧m,10.71lbf‧ft) GX-25

12 N‧m(1.2 kgf‧m,2.2lbf‧ft)

3.0 N‧m(0.3 kgf‧m,2.2lbf‧ft)

6.4 N‧m(0.65 kgf‧m,4.7lbf‧ft)

6.4 N‧m(0.65 kgf‧m,4.7lbf‧ft)

4.4 N‧m (0.45 kgf‧m,3.2lbf‧ft)

6.4 N‧m(0.65 kgf‧m,4.7lbf‧ft)

3.0 N‧m(0.3 kgf‧m,2.2lbf‧ft)

3.0 N‧m(0.3 kgf‧m,2.2lbf‧ft)

4.9 N‧m (0.45 kgf‧m,3.2lbf‧ft)

THROTTLE STOP SCREW

Adjustment:Start the engine and allow it to warm up to normal operating temperature.Then,adjust the idle speed by turning the throttle stop screw right or left.

Honda recommends that you use API SERVICE category SF or SG oil.

Set the oil seal on the crankshaft.

Install by aligning the oil seal projection with the groove in the cylinder barrel.

Standard idle speed 3.100±200rpm

CYINDER HEAD CENTER

ADJUSTINGSCREW

ADJUSTINGSCREWLOCK NUT

To increase valve clearance,screw out.To decrease valve clearance,screw in.

0.3-0.5mm (0.012-0.020 in)

Specified clearance

0.2-0.4mm (0.008-0.016 in)

GX25

GX35

FEELERGAUGE

MAGNETICPARTS

0.2-0.4mm(0.008-0.016 in)

0.2-0.4mm(0.008-0.016 in)

CAM PULLEY

TIMING BELT

PISTON

CRANKSHAFT 10mm(0.4 in)

CYLINDERBARREL

BREATHER TUBE

12.3×2.4mm O-RING

CARBURETORGASKET

10W-30

-30 -20 -10 0 10 20 30 40℃

-20 0 20 40 60 80 100℉

“ ” MARK

“ ” or “R” MARK

O-RING

INLET SCREEN

INLETNEEDLEVALVE

METERINGDIAPHRAGM

METERINGLEVER PIN

METERINGLEVERSPRING METERING

LEVER

METERINGDIAPHRAGMGASKET

PUMPDIAPHRAGM

MAIN JETPUMP SPRING

PUMP GASKET

SOLVENT ENGINE OIL

SQUEEZETHOROUGHLY

AIR CLEANER COVER

OILFILLERNECK

AIR CLEANERELEMENT

TORQUE:4.9N‧m(0.5Kgf‧m,3.9lbf‧ft)

Standard valve clearance0.08±0.02mm0.11±0.02mm

INEX

Spark plug gap 0.6–0.7mm (0.024–0.028 in)

Standard spark plug CMR5H (NGK)

ALIGNMENT MARK

CRANKSHAFT/CAMPULLEY CRANKSHAFT/PISTON CARBURETOR DISASSEMBLY/REASSEMBLY CARBURETOR REMOVAL /INSTALLATION

ENGINE OIL

AIR CLEANER

SPARK PLUG

ADJUSTMENT THE IDLE SPEED

IGNITION COIL AIR GAP

VALVE CLEARANCE