Specifications

ManualsBrandsCraftsman ManualsAutomotive143.991200

MATCH MARKS

DURLOCK BOLT

OIL SEAL

PROTECTOR

SERVICE BUSHING

We are supplying this bushing for service repair. After the bushing has been installed, it requires line reaming

to the proper size.

Following the chart below, have a reputable machine shop do this work for you.

BUSHING SIZE CHART

BUSHING SERVICE FINISHED REAM

PART NUMBER BORE DIAMETER

30979 .............................................................. .8755 - .8760" (22.226 - 22.250 mm)

31461 .............................................................. 1.0000 - 1.0005" (25.4 - 25.413 mm)

31462 .............................................................. 1.0000 - 1.0005" (25.4 - 25.413 mm)

31546 .............................................................. 1.0000 - 1.0005" (25.4 - 25.413 mm)

33368 .............................................................. 1.1880 - 1.1890" (30.175 - 30.2 mm)

34836 .............................................................. 1.0005 - 1.0010" (25.413 - 25.425 mm)

34837 .............................................................. 1.0005 - 1.0010" (25.413 - 25.425 mm)

35377 .............................................................. 1.3765 - 1.3770" (34.950 - 34.976 mm)

35400 .............................................................. 1.3765 - 1.3770" (34.950 - 34.976 mm)

ENGINE ASSEMBLY

The following procedures apply to most engine

models. Actual procedure may vary.

1. Use new gaskets and seals at all locations.

Clean all internal engine parts with solvent

and blow dry with compressed air or allow to

dry.

2. Using the correct seal protector (see Chapter

11 under "Tools"), apply engine oil to the

crankshaft bearing surfaces and insert the

tapered end of the crankshaft in the

crankcase. Slide the crankshaft in until it

bottoms.

3. Apply engine oil to the piston skirt, rings,

connecting rod bearing surface, and the

cylinder bore. Using a band type ring

compressor, stagger the ring end gaps,

compress the rings, and push the piston

assembly into the cylinder with the match

marks on the connecting rod facing out of the

crankcase and the arrow on the top of piston

or on the piston skirt pointing toward the push

rod location or the carburetor side of the

engine if applicable. Push the piston

assembly in until the rod is positioned on the

crankshaft rod journal surface.

4. Align the match marks on the rod cap and

rod, install the rod cap bolts and dipper if

applicable and tighten the bolts in equal

increments to the specified torque.

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