EH12, EH17, EH25 - Small Engine Discount
EH12, EH17, EH25 - Small Engine Discount EH12, EH17, EH25 - Small Engine Discount
TOP RING “N” MARK SECOND RlNC OIL RING I Fig. 5-28 Fig. 5-29 5-4-3 PISTON AND CONNECTING ROD (1) When installing the piston on the connecting rod, place ‘‘4 ” mark of the piston crown on the “MAG” side of the connecting rod. (See Fig. 5-30.) Apply oil to the small end of the connecting rod, piston and piston pin before installation. Be sure to use clips on the both end of the piston pin to secure the pin in position. “MAG” SIDE I ” 4 ” MARK Fig. 5-30 - 32 -
(2) Install the piston and connecting rod assembly into the cylinder. Use a piston ring compressor to hold the piston rings. Place ‘‘4 ” mark of the piston crown on the magneto side of the crankcase.(See Fig. 5-31.) PISTON RING COMPRESSOR CONNECTING ROD -[NOTES] 1 (1) Applyenough oil to piston rings, connecting rod bearings and cylinder bore before assembly. (2) Set gaps of the piston rings 90 degrees apart from each other before assembly. (See Fig. 5-32.) CRANK CASE (FLYWHEEL SIDE) Fig. 5-31 -SECOND RING \ Fig. 5-32 5-4-4 CONNECTING ROD (1) Turn crankshaft to bottom dead center, lightly tap top of the piston until large end of the rod meet crankpin. (2) Install the connecting rod cap to the connecting rod matching alignment marks. (See Fig. 5-33.) Torque connecting rod bolts to specification. M8 X 46 mm connecting rod bo1 t .... 2pcs. CONNECTING ROD BOLT TIGHTENING TORQUE I EH12 I EH17 I EH25 I 90-1 15 kg*cm 9-11 N-m 170-200 kg-cm 17-19.5 Nom 225-275 kgocrn 22-27 Nom 6.5-8.3 ft*lb 12.3-14.5 ftdb 16.3-19.9 ft4b ALIGNMENT MARK h Fig. 5-33 B (3) Check for free movement of connecting rod by turning crankshaft slowly. - 33 -
- Page 2 and 3: ROBIN ROBIN AMERICA, INC. ROBIN TO
- Page 4 and 5: " . 13-1 13-2 13-3 13-4 13-5 13-6 1
- Page 6 and 7: ~~~~ ~~ Model TY Pe Bore X Stroke P
- Page 8 and 9: 2. PERFORMANCE 2-1 MAXIMUM OUTPUT A
- Page 10 and 11: n 0 EHf7D, B (. ). for B type " kg-
- Page 12 and 13: 3. FEATURES 1. The overhead valve d
- Page 14 and 15: 4-6 CAMSHAFT ‘I’he camshaft for
- Page 16 and 17: 4-12 IGNITION SYSTEM The ignition s
- Page 18 and 19: ROCKER ARM I L - 14 -
- Page 20 and 21: 5-3 DISASSEMBLY PROCEDURES Step Par
- Page 22 and 23: ~~ I Step I Part to remove 1 Proced
- Page 24 and 25: Step Part to remove Procedures Rema
- Page 26 and 27: ~ ~~ ~ ~~ ~~~ ~ I Step Part to remo
- Page 28 and 29: ~~ ~ ~~ Step 18 Part to remove 1 Pr
- Page 30 and 31: Step Part to remove 1 Procedures Re
- Page 32 and 33: Step 26 Part to remove Connecting r
- Page 34 and 35: ~~~~ Step Part to remove Procedures
- Page 38 and 39: 54-5 BALANCER SHAFT (EH25 type only
- Page 40 and 41: Fig. 5-36 (2) Lubricate the oil sea
- Page 42 and 43: (2) Loosen the lock nut on the rock
- Page 44 and 45: (3) Connect the speed control lever
- Page 46 and 47: 5-5 BREAK-IN OPERATION An engine th
- Page 48 and 49: 6-3 WIRING DIAGRAM STANDARD - Ignit
- Page 50 and 51: 8. CARBURETOR 8-1 OPERATION AND CON
- Page 52 and 53: 8-2-4 MAIN SYSTEM (1) Remove the bo
- Page 54 and 55: (4) Remove the reel from the starte
- Page 56 and 57: (6) Test the operation of the recoi
- Page 58 and 59: 10-1-3 IGNlTfON SYSTEM Check the fo
- Page 60 and 61: 11. INSTALLATION Engine life, ease
- Page 62 and 63: ITEM T EH12 T EH17 Unit: mrn (in) S
- Page 64 and 65: ~~ ~~~ ~ Ring groove ITEM side clea
- Page 66 and 67: ITEM T STD EH12 Limit Unit: mrn (in
- Page 68 and 69: ~ CONNECTING ROD ITEM T STD EH25 Li
- Page 70 and 71: Unit : mm (in) CAMSHAFT ITEM STD EH
- Page 72 and 73: ITEM T STD EH25 Limit Unit: mm (in)
- Page 74 and 75: 12-3 OIL GRADE CHART I 5w I Compari
- Page 76: ~ ~ ~~~~ ~ ~ 13-4 EVERY 100-200 HRS
TOP RING<br />
“N” MARK<br />
SECOND RlNC<br />
OIL RING<br />
I<br />
Fig. 5-28<br />
Fig. 5-29<br />
5-4-3 PISTON AND CONNECTING ROD<br />
(1) When installing the piston on the connecting<br />
rod, place ‘‘4 ” mark of the piston crown on<br />
the “MAG” side of the connecting rod.<br />
(See Fig. 5-30.)<br />
Apply oil to the small end of the connecting<br />
rod, piston and piston pin before installation.<br />
Be sure to use clips on the both end of the<br />
piston pin to secure the pin in position.<br />
“MAG” SIDE<br />
I<br />
” 4 ” MARK<br />
Fig. 5-30<br />
- 32 -
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