Wisconsin VH4D Spécifications

NOTE:CYLINDERS, RINGS, PISTONS, PINS, TAPPETS, VALVES,CAMSHAFT, BEARINGS AND ETC. ARE LUBRICATED BYTHE OIL SPRAY OR MIST THROWN OFF T

GENERAL INFORMATION and DESIGNWisconsin engines are of the four cycle type, in which eachof the four operations of intake, compression

GRADE OF OILSEASON OR TEMPERATURESpring, Summer or Fall+ 120°F to + 40°FWinter+ 40°F to + 15°F+ 15°F to 0°FBelow ZeroGRADE OF OILSAE 30SAE 20-20WS

IGNITION SWITCHMagneto ignition is standard on these engines, with a levertype switch on the side of the magneto, which is always in theon or runni

Fig. 8Fig. 7is in good condition; otherwise use a new gasket. SeeFig. 7, which shows the strainer mounted to the fueltank of a pow

HOLE PLUGFig. lO=Magneto Breaker Point Adjustment’. If this does notremedy the trouble, it may be necessary to install anew condenser.

No. 1 TERMINAL INDICATED ONMAGNETO END CAP AS SHOWN.OTHER TERMINALS FOLLOW FIR-ING ORDER IN CLOCKWISE ROTA-TION.NO 9--NO 4~NO 3VERTICA

NEON LAMP TIMINGThe engine should be timed to the 23° advancedposition at not less than 2000 R.P.M.The timing should be checked with a neon

FOREWORDGood operation and a planned maintenance program as outlined in this manual are vital inobtaining maximum engine performance and long engin

Fig. 172. Open these covers frequently and clean out alldust and chaff. Be sure to close covers.3. Keep this space between cylinders

To test for clogged fuel line, loosen fuel line nut atcarburetor slightly. If line is open, fuel should dripout at loosened nut.CO

Loose or burnt out connecting rod bearing.Engine overheated due to causes under previousheading.Worn or loose piston pin.ENGINE BACKFIR

Fig. 19CYLINDER HEADThe cylinder head must be removed if it is necessaryto regrind valves, or to work on the piston, rings orconnec

In reassembly; inspect crankshaft oil seal and re-place if necessary. Be sure that oil sling is in placeon crankshaft, then mount

LOCATING LUGSSTAMPEDNUMBERSSHELLBEARINGFig. 26Fig. 28MARK ON CAPOIL SPRAY NOZZLESFig, 27crankshaft untilpiston is at top, then push connect

PLACE OPEN END OFRING ON PISTONFIRST AS SHOWNFig. 30CHROME FACEDCOMPRESSION RINGSCRAPER RINGOIL RING WITHEXPANDERF ig. 31over piston and into correc

VALVE LIFTERRETAINERF ig. 33.007", the guides should be driven out and replacedwith new guides.These engines that have Stellite exh

OIL FILLER ANDINSPECTION PLATEOIL LEVEL PLUGOIL DRAIN PLUGFig. 38CLUTCH ADJUSTIvlENTIf the clutch begins to slip, it should be readjus

IMPORTANTREAD THESE INSTRUCTIONS CAREFULLYAll points of operation and maintenance have been covered as carefully as possible, but if furtherinformati

OIL FILLEROILLEVEL PLUGSOIL DRAIN PLUGFig. 41quency at which these oil changes should be madedepends entirely on the kind of service

FUEL PUMP SERVICE INSTRUCTIONSWISCONSIN FUEL PUMPS, No. LP-38E, LP-38H and LP-38F (Cold Weather: -65°F)For all 4 cylinder engine modelsThe

WIRING CIRCUIT, Flg. 42, Flg. 43The fool-proof type connectors used to prevent incor-rect wiring from the stator to the rectifier an

Problem: Low/No ChargePossible Cause & RemedyTest 2.02.12.2Proceed with Test1.0 and 1.1. It isnecessary toslightly dischargebattery t

Test 7.0 STATOR GROUNDLike the Regulator, the YB 81 and YB 82 Stators mustbe grounded. Stator ground can be checked with anytype co

ZENITH MODEL 87A8 CARBURETORL-57, L.77Seri sSERVICE INSTRUCTIONSDESCRIPTIONThe Zenith 87-Series is a horizontal carburetor with a con-centric fuel

Adjust the idle adjusting needle to obtain smooth idling ofthe engine at idling speed. Turn the needle out (counter-clockwise) to

IMPORTANT SAFETY NOTICEProper repair is important to the safe and reliable operation of an engine. This Repair Manualoutlines basic recommended pro

CARBURETORZENITH MODEL 68-7WISCONSIN L-63 SERIESL-63 SerlesThe Zenith 68-7 Series carburetor is of an up-draft single venturidesign with a

when startin{~ the engine. The choke valve is of a =semi=automa-tics type, having a poppet valve incorporated in its design, whichis

DISASSEI~BLYBefore disassembling: Clean outside of carburetor from allreign material.When cleaning a completely assembled carburetordo not blow w

MAGNETO SERVICE INSTRUCTIONSFAIRBANKS-MORSE TYPE FM-X4B7AY-97 SeriesWisconsin No. Y-97-$2 (With GD-93C-4 DRIVE GEAR) FOR MODEL VH4DGENERAL DESCRIP

SERVICE PARTS LISTPER-LUX YF50S1/YF50AS1 DISTRIBUTORDISTRIBUTORAPPLICATIONYF50SI and YF5OCSIVH4D, SIDEMOUNTYF50ASI and YF50DSIVH4D, TOP MOUNTIT

SAFETY PRECAUTIONS¯Never fill fuel tank while engine is running or hot;avoid the possibility of spilled fuel causing a fire.¯ Always refuel slowly t

EXHAUST MUFFLERP RE-CLEANERAIR CLEANERCARBURETORFUEL PUMPFUEL PUMP PRIMER HANDLEAIR VENT HOLEFUEL TANK CAP-----~OIL FILLER ANDBREATHER CAPGASOL