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ROBIN AMERICA, INC. ROBIN TO WISCONSIN ROBIN ENGINE MODEL CROSS REFERENCE LIST ROBIN WISCONSIN ROBIN SIDE VALVE EY 08 W 1-080 EY15 WI-145 EY 15V W1-145V EY20 W1-185 EY20V W1-185V EY23 W 1-230 EY28 W 1-280 EY3 5 Wl-340 EY40 W1-390 EY45V W 1 -450V EY2 1 EY21W EY44 EY44W EY 18-3 EY 18-3W EY25 EY25W EY27 EY27W v EH11 WO1-115 EH12 wo1-120 EH15 WO1-150 EH17 WO1-170 EH2 1 wo1-210 EH25 WO 1-250 EH3 0 WO 1 -300 EH30V WOI-3oov EH34 WO 1-340 EH34V WO1-340V EH43V WO
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CONTENTS Section Title Page 1 . SPECIFICATIONS ............................................ 1 2 . PERFORMANCE ............................................ 2 2.1 . Maximumoutput ....................................... 2 . Continuous Rated Output ................................. 2 2.2 2.3 . Maximum Torque and Fuel Consumption Ratio at Max . Output ........ 2 3 . FEATURES ............................................... 3 4 . GENERAL DESCRIPTION of ENGINE CONSTRUCTION ............... 4
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7 . MAGNETO ............................................... 18 7.1 . Magneto ............................................. 18 7.2 . Breaker Point Adjustment ................................. 18 7.3 . Timing Adjustment ..................................... 18 7.4 . Magneto Service Instructions ............................... 19 8 . GOVERNOR ADJUSTMENT ................................... 21 9.CARBURETOR ............................................. 22 9.1 . Operation and Construction ...
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1. SPEC1 FICATIONS -1-
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2. PERFORMANCE 2-1 MAXIMUM OUTPUT The maximum output of an engine is such standard power as developed by that engine, after its initial run-in period with a1 the moving parts properly worn-in, when operating with the fully open throttle valve. Therefore, it follows that a nev engine may not develop this maximum output in the beginning, because moving parts are not in a properly w0rn-h condition. 2-2 CONTINUOUS RATED OUTPUT The continuous ra
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3. FEATURES 1. A compact, lightweight, and highly durable 4cycle aircooled EYseries with high output, embodying ingenious design and advanced machining techniques. 2. Simple construction, good appearance, plus easy start-up. 3. Smooth speed control functions of governor guarantees stable operation under various load conditions over a wide range of applications. 4. Economical advantage with minimized fuel consumption. 5. Since power can be taken
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/- FLYWHEEL(COOLI~G FAN) I \ LIGHTING COIL CRANKCASE -4 -
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SEl -5-
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4-2 CRANKCASE The crankcase is made of aluminum die-cast and separable on driving shaft side with main bearing cover assembled. Provided on blower side are two ball bearings, each supporting the crankshaft and camshaft. 4-3 MAIN BEARING COVER The aluminum die-cast main bearing cover on the driving shaft side allows easy access to the engine interior for inspection simply by removing it. The’fange and boss permit direct coupling of operating machin
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4-10 GOVERNOR The centrifugal flyweight type governor assures constant-speed operation at selected speed, irrespective of load fluctuations. 4-11 COOLING The cooling fan which also serves as a flywheel forcily feeds cooling air to the cylinder head with the aid of cylinder baffles and head cover. 4-12 LUBRICATION The rotating and sliding parts are lubricated by scooping and splashing oil in crankcase with oil scraper attached to connecting ro
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5. INSTALLATION Since the installation method affects the service life, ease of maintenance, frequency of check and reapir, and operating costs of engine, the following contents should be carefully examined before installing your engine. For details, refer to the separate “SALES MANUAL”-Engineering Information-. 5-1 MOUNTING When installing the engine, its mounting position, coupling conditions with operating machines, and anchoring or supporting
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5-6 WIRING a JIS CB104 female terminal -e JIS CA104 male terminal -@ JIS LA 104 or LA1 08 plate terminal - """ The dotted parts are not supplied with the engine. 5-6-1 ROPE STARTING ENGINE MAGNETO _"""" / '.-N BUZZER (6"- 8W) SPARK PLUG LAMP (12V. 15W) Fig. 5-6-1 5-6-2 ENGINE with STARTING MOTOR MAGNETO LA 104 - g -:
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6. DISASSEMBLY and REASSEMBLY 6-1 PREPARATIONS and SUGGESTIONS 1) When disassembling engine, carefully note mounting positions and methods of respective parts in order to be able to reassemble them correctly. Tag parts, if there is a possibility of confusion. 2) Prepare several boxes to keep parts belonging to respective groups together. 3) In order to prevent missing or misplacing, group related parts together, tentatively assembling them immediately af
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209 9901 0 07 Flywheel Puller (Y790-350) I Bolt 001 65085 00 209 9901 1 07 Valve Spring Compressor (Y790-282) I1 Valve Seat Cutter (45”) 209 9901 2 07 1 Pilot Stem 1 (H640-118) 6-3 DISASSEMBLY and REASSEMBLY PROCEDURES 6-3-1 FUEL TANK and TANK BRACKET 1) Disconnect fuel pipe between fuel strainer and carburetor from carburetor. 2) Detach fuel tank from its mounting bracket (8mm nut X 4). 3) Detach bracket and head cover from cylinder head (8mm bolt X 2
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6-3-6 STARTING PULLEY and FLYWHEEL (magneto) Remove 3 pieces mounting bolts to detach starting pulley from flywheel. Remove flywheel from crankshaft. Insert a socket wrench or box wrench into an 18mm nut, and give the wrench a sharp blow with a soft hammer. Remove nut and spring washer. Attach flywheel puller to flywheel as shown in Fig. 6-3-1, and turn center bolt clockwise until flywheel becomes loose enough to be removed. Disconnect h
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In reassembly; 1) Clean carbon and gum deposits from the valves, seats, ports and valve stem holes. 2) Replace valves, if badly burned, pitted or warped. 3) Correct the valve seat by using 45" seat cutter tool as illustrated in Fig. 6-3-3. The seat should be finished to 1.2-1 Smm (.04-.05 inch) in width. 4) Cylinder block should be replaced if valve stem clearance becomes excessive. 'Refer to Fig. ..-' 4 for clearance specifications and proper assembly
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ADJUSTING TAPPET CLEARANCE (Fig. 6-3-5) 6) * Rotate crankshaft until tappet is in its lowest position, hold valve down and insert feeler gauge between valve and tappet stem. The clearance for both intake and exhaust, with engine cold. 0.13-0.17mm (0.0051”to 0.0067“) * If clearance is less than specified, slightly grind valve stem and measure it again. * If clearance is larger than specified, sink valve seat to adjust clearance. * After clearance adjus
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In reassembly; 1) When reassembling main bearing cover, assemble governor lever shaft and governor arm before reinstalling them into crankcase. NOTE: If replacement of oil seal is required, force-fit new oil seal before reassembly. 2) When reassembling main bearing cover, apply oil to bearing surfaces, gear train, tappets, and oil seal lips, and form a thin film of oil on main bearing cover face. Mount an oil seal guide onto .crankshaft to prevent dama
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In reassembly; PISTON RING (See Fig. 6-3-10) 1) Use a ring expander tool to prevent ring from becoming distorted or broken when installing onto piston. If an expander tool is not available, install rings by of piston. placing the open end of the ring on first land Spread ring only far enough to slip over piston and into correct groove, being careful not to district ring. (Fig. 6-3-1 0) NOTE: With or without expander tool, assemble bottom ring first
