Robin EH12 Service Manual

5-4-7-1 CRANKSHAFT END PLAY (For D type and B type)
(1) Measure the depth “Al” (From the mating surface to the inner race of the ball bearing.)
(2) Measure the height “BI” (From the mating to the crank gear.)
(Al+ 0.3) - Bl=SIDE CLEARANCE (mm)
(SIDE CLEARANCE) - 0.2=THICKNESS OF CRANKSHAFT SHIM (mm)
(A+ 0.0123 -’ Bl=SIDE CLEARANCE (in)
SIDE CLEARANCE - 0.008”=THICKNESS OF CRANKSHAFT SHIM (in)
5-4-7-2 CAMSHAFT END PLAY (Model B=2:1 Reduction type only)
(1) Measure the depth “A2” (From the mating surface to the inner race of the camshaft bearing.)
(2) Measure the weight “B2” (From the mating surface to the camgear inner boss.)
(A2+ 0.3) - B=SIDE CLEARANCE (mm)
(SIDE CLEARANCE) - 0.2=THICKNESS OF CAMSHAFT SHIM (mm)
(A2+ 0.012”) - B=SIDE CLEARANCE (in)
SIDE CLEARANCE - 0.008”=THICKNESS OF CAMSHAFT SHIM (in)
Following are availalbe spacer shims.
EH12, EH17 type
CRANKSHAFT
CAMSHAFT
T=0.6
mm (0.024”) T=0.6 mm (0.024”)
SPACER SHIMS
T=l.O mm (0.039”)
T=l .O mm (0.039”)
T=0.8 mm (0.031 ”)
T=0.8 mm (0.031 ”)
EH25 type
CRANKSHAFT
CAMSHAFT
T=2.7 mm (0.106”) T=0.6 mm (0.024”)
SPACER SHIMS
T=l .O mm (0.039”)
T=3.1 mm (0.1 12“)
T=0.8 mm (0.031 ”) T=2.9 mm (0.1 14”)
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Robin EH12 Specifications

General

Ignition System	Transistorized magneto ignition
Starting System	Recoil starter
Bore x Stroke	60 mm (2.36 in) x 43 mm (1.69 in)
Max Output	3.6 kW (4.8 HP) at 3, 600 rpm
Engine Type	4-Cycle, Air cooled, Single cylinder, OHV